roll everything back.

36 files changed, 517 insertions, 15371 deletions

diff --git a/geometry.h b/geometry.h
deleted file mode 100644
index 0e4f748..0000000
--- a/geometry.h
+++ /dev/null
@@ -1,110 +0,0 @@
-#define DEG 0.01745329251994330	/* π/180 */
-
-typedef struct Point2 Point2;
-typedef struct Point3 Point3;
-typedef double Matrix[3][3];
-typedef double Matrix3[4][4];
-typedef struct Quaternion Quaternion;
-typedef struct RFrame RFrame;
-typedef struct RFrame3 RFrame3;
-typedef struct Triangle3 Triangle3;
-
-struct Point2 {
-	double x, y, w;
-};
-
-struct Point3 {
-	double x, y, z, w;
-};
-
-struct Quaternion {
-	double r, i, j, k;
-};
-
-struct RFrame {
-	Point2 p;
-	Point2 bx, by;
-};
-
-struct RFrame3 {
-	Point3 p;
-	Point3 bx, by, bz;
-};
-
-struct Triangle3 {
-	Point3 p0, p1, p2;
-};
-
-/* Point2 */
-Point2 Pt2(double, double, double);
-Point2 Vec2(double, double);
-Point2 addpt2(Point2, Point2);
-Point2 subpt2(Point2, Point2);
-Point2 mulpt2(Point2, double);
-Point2 divpt2(Point2, double);
-Point2 lerp2(Point2, Point2, double);
-double dotvec2(Point2, Point2);
-double vec2len(Point2);
-Point2 normvec2(Point2);
-
-/* Point3 */
-Point3 Pt3(double, double, double, double);
-Point3 Vec3(double, double, double);
-Point3 addpt3(Point3, Point3);
-Point3 subpt3(Point3, Point3);
-Point3 mulpt3(Point3, double);
-Point3 divpt3(Point3, double);
-Point3 lerp3(Point3, Point3, double);
-double dotvec3(Point3, Point3);
-Point3 crossvec3(Point3, Point3);
-double vec3len(Point3);
-Point3 normvec3(Point3);
-
-/* Matrix */
-void identity(Matrix);
-void addm(Matrix, Matrix);
-void subm(Matrix, Matrix);
-void mulm(Matrix, Matrix);
-void smulm(Matrix, double);
-void transposem(Matrix);
-double detm(Matrix);
-double tracem(Matrix);
-void adjm(Matrix);
-void invm(Matrix);
-Point2 xform(Point2, Matrix);
-
-/* Matrix3 */
-void identity3(Matrix3);
-void addm3(Matrix3, Matrix3);
-void subm3(Matrix3, Matrix3);
-void mulm3(Matrix3, Matrix3);
-void smulm3(Matrix3, double);
-void transposem3(Matrix3);
-double detm3(Matrix3);
-double tracem3(Matrix3);
-void adjm3(Matrix3);
-void invm3(Matrix3);
-Point3 xform3(Point3, Matrix3);
-
-/* Quaternion */
-Quaternion Quat(double, double, double, double);
-Quaternion Quatvec(double, Point3);
-Quaternion addq(Quaternion, Quaternion);
-Quaternion subq(Quaternion, Quaternion);
-Quaternion mulq(Quaternion, Quaternion);
-Quaternion smulq(Quaternion, double);
-Quaternion sdivq(Quaternion, double);
-double dotq(Quaternion, Quaternion);
-Quaternion invq(Quaternion);
-double qlen(Quaternion);
-Quaternion normq(Quaternion);
-Point3 qrotate(Point3, Point3, double);
-
-/* RFrame */
-Point2 rframexform(Point2, RFrame);
-Point3 rframexform3(Point3, RFrame3);
-Point2 invrframexform(Point2, RFrame);
-Point3 invrframexform3(Point3, RFrame3);
-
-/* Triangle3 */
-Point3 centroid(Triangle3);
diff --git a/graphics.h b/graphics.h
deleted file mode 100644
index 51c0a93..0000000
--- a/graphics.h
+++ /dev/null
@@ -1,51 +0,0 @@
-typedef enum {
-	Portho,		/* orthographic */
-	Ppersp		/* perspective */
-} Projection;
-
-typedef struct Vertex Vertex;
-typedef struct Viewport Viewport;
-typedef struct Camera Camera;
-
-struct Vertex {
-	Point3 p;	/* position */
-	Point3 n;	/* surface normal */
-};
-
-struct Viewport
-{
-	RFrame;
-	Memimage *fb;
-};
-
-struct Camera {
-	RFrame3;		/* VCS */
-	Viewport viewport;
-	double fov;		/* vertical FOV */
-	double clipn;
-	double clipf;
-	Matrix3 proj;		/* VCS to NDC xform */
-	Projection ptype;
-
-	void (*updatefb)(Camera*, Rectangle, ulong);
-};
-
-/* Camera */
-Camera *alloccamera(Rectangle, ulong);
-void configcamera(Camera*, Image*, double, double, double, Projection);
-void placecamera(Camera*, Point3, Point3, Point3);
-void aimcamera(Camera*, Point3);
-void reloadcamera(Camera*);
-
-/* rendering */
-#define FPS2MS(n)		(1000/(n))
-#define WORLD2VCS(cp, p)	(rframexform3((p), *(cp)))
-#define VCS2NDC(cp, p)		(xform3((p), (cp)->proj))
-#define WORLD2NDC(cp, p)	(VCS2NDC((cp), WORLD2VCS((cp), (p))))
-int isclipping(Point3);
-Point toviewport(Camera*, Point3);
-Point2 fromviewport(Camera*, Point);
-void perspective(Matrix3, double, double, double, double);
-void orthographic(Matrix3, double, double, double, double, double, double);
-void line3(Camera*, Point3, Point3, int, int, Image*);
-Point string3(Camera*, Point3, Image*, Font*, char*);
diff --git a/libgeometry/doc/libgeometry.ms b/libgeometry/doc/libgeometry.ms
deleted file mode 100644
index 47c8d94..0000000
--- a/libgeometry/doc/libgeometry.ms
+++ /dev/null
@@ -1,429 +0,0 @@
-.TL
-libgeometry
-.AU
-Rodrigo G. López
-.sp
-rgl@antares-labs.eu
-.AI
-Antares Telecom Laboratories
-Albatera, Alicante
-.FS
-ACHTUNG! this is a
-.B "WORK IN PROGRESS"
-.FE
-.SH
-Introduction
-.PP
-.I Libgeometry is a computational geometry library that provides all
-the utilities anybody working with graphics or scientific simulations
-could need.
-.NH 1
-Data Structures
-.NH 2
-Point2
-.P1
-struct Point2 {
-	double x, y, w;
-};
-.P2
-.PP
-.I Point2
-represents a point in two-dimensional projective space, which itself
-is an extension of the two-dimensional euclidean space that allows us
-to work with vectors and compose affine transformations in a friendly
-manner.  A point
-.EQ
-gfont roman
-(x, y, w)
-.EN
-made out of homogenous coordinates
-.I x ,
-.I y ,
-and
-.I w ,
-yields a point with cartesian coordinates
-.EQ
-(x/w, y/w) .
-.EN
-.NH 2
-Point3
-.P1
-struct Point3 {
-	double x, y, z, w;
-};
-.P2
-.PP
-.I Point3
-is a point in three-dimensional projective space.
-.NH 2
-Matrix
-.P1
-typedef double Matrix[3][3];
-.P2
-.PP
-.I Matrix
-represents a 3x3 matrix, thought to compose affine transformations to
-apply to homogeneous 2D points.
-.NH 2
-Matrix3
-.P1
-typedef double Matrix3[4][4];
-.P2
-.PP
-.I Matrix3
-represents a 4x4 matrix, thought to compose affine transformations to
-apply to homogeneous 3D points.
-.NH 2
-Quaternion
-.P1
-struct Quaternion {
-	double r, i, j, k;
-};
-.P2
-.PP
-.I Quaternions
-are a numbering system that extends the complex numbers up to
-four-dimensional space, and are used to apply rotations and model
-mechanical interactions in 3D space.  Their main advantages with
-respect to their matrix relatives are increased computational and
-storage performance and gimbal lock avoidance.
-.NH 2
-RFrame
-.P1
-struct RFrame {
-	Point2 p;
-	Point2 bx, by;
-};
-.P2
-.PP
-A reference frame (or frame of reference) is
-.NH 2
-RFrame3
-.P1
-struct RFrame3 {
-	Point3 p;
-	Point3 bx, by, bz;
-};
-.P2
-.PP
-A reference frame (or frame of reference) is
-.NH 1
-Algorithms
-.NH 2
-Point2
-.SH
-Addition
-.P1
-Point2 addpt2(Point2 a, Point2 b)
-.P2
-.EQ
-a + b ~=~ left ( x sub a + x sub b ,~ y sub a + y sub b ,~ w sub a + w sub b right )
-.EN
-.SH
-Substraction
-.P1
-Point2 subpt2(Point2 a, Point2 b)
-.P2
-.EQ
-a - b ~=~ left ( x sub a - x sub b ,~ y sub a - y sub b ,~ w sub a - w sub b right )
-.EN
-.SH
-Multiplication
-.P1
-Point2 mulpt2(Point2 p, double s)
-.P2
-.EQ
-p * s ~=~ left ( xs,~ ys,~ ws right )
-.EN
-.SH
-Division
-.P1
-Point2 divpt2(Point2 p, double s)
-.P2
-.EQ
-p / s ~=~ left ( x over s ,~ y over s ,~ w over s right )
-.EN
-.SH
-Vector Dot Product
-.P1
-double dotvec2(Point2 a, Point2 b)
-.P2
-.EQ
-a vec ~•~ b vec ~=~ x sub a x sub b + y sub a y sub b
-.EN
-.SH
-Vector Magnitude/Length
-.P1
-double vec2len(Point2 v)
-.P2
-.EQ
-| v vec | ~=~ sqrt { x sup 2 + y sup 2 }
-.EN
-.SH
-Vector Normalization
-.P1
-Point2 normvec2(Point2 v)
-.P2
-.EQ
-n vec ~=~ left ( x over {| v vec |},~ y over {| v vec |} right )
-.EN
-.NH 2
-Point3
-.SH
-Addition
-.P1
-Point3 addpt3(Point3 a, Point3 b)
-.P2
-.EQ
-a + b ~=~ left ( x sub a + x sub b ,~ y sub a + y sub b ,~ z sub a + z sub b ,~ w sub a + w sub b right )
-.EN
-.SH
-Substraction
-.P1
-Point3 subpt3(Point3 a, Point3 b)
-.P2
-.EQ
-a - b ~=~ left ( x sub a - x sub b ,~ y sub a - y sub b ,~ z sub a - z sub b ,~ w sub a - w sub b right )
-.EN
-.SH
-Multiplication
-.P1
-Point3 mulpt3(Point3 p, double s)
-.P2
-.EQ
-p * s ~=~ left ( xs,~ ys,~ zs,~ ws right )
-.EN
-.SH
-Division
-.P1
-Point3 divpt3(Point3 p, double s)
-.P2
-.EQ
-p / s ~=~ left ( x over s ,~ y over s ,~ z over s ,~ w over s right )
-.EN
-.SH
-Vector Dot Product
-.P1
-double dotvec3(Point3 a, Point3 b)
-.P2
-.EQ
-a vec ~•~ b vec ~=~ x sub a x sub b + y sub a y sub b + z sub a z sub b
-.EN
-.SH
-Vector Cross Product
-.P1
-double crossvec3(Point3 a, Point3 b)
-.P2
-.EQ
-a vec ~×~ b vec ~=~ left ( y sub a z sub b - z sub a y sub b ,~
-			 z sub a x sub b - x sub a z sub b ,~
-			 x sub a y sub b - y sub a x sub b right )
-.EN
-.SH
-Vector Magnitude/Length
-.P1
-double vec3len(Point3 v)
-.P2
-.EQ
-| v vec | ~=~ sqrt { x sup 2 + y sup 2 + z sup 2 }
-.EN
-.SH
-Vector Normalization
-.P1
-Point3 normvec3(Point3 v)
-.P2
-.EQ
-n vec ~=~ left ( x over {| v vec |},~ y over {| v vec |},~ z over {| v vec |} right )
-.EN
-.NH 2
-Matrix
-.SH
-Addition
-.P1
-void addm(Matrix A, Matrix B)
-.P2
-.EQ
-( bold A + bold B ) sub {i,j} ~=~ bold A sub {i,j} + bold B sub {i,j}
-.EN
-.SH
-Substraction
-.P1
-void subm(Matrix A, Matrix B)
-.P2
-.EQ
-( bold A - bold B ) sub {i,j} ~=~ bold A sub {i,j} - bold B sub {i,j}
-.EN
-.SH
-Multiplication
-.P1
-void mulm(Matrix A, Matrix B)
-.P2
-.EQ
-left [ bold A bold B right ] sub {i,j} ~=~ sum from {k = 0} to 3-1 bold A sub {i,k} bold B sub {k,j}
-.EN
-.SH
-Transpose
-.P1
-void transposem(Matrix M)
-.P2
-.EQ
-( bold M sup T ) sub {i,j} ~=~ bold A sub {j,i}
-.EN
-.SH
-Identity
-.P1
-void identity(Matrix M)
-.P2
-.EQ
-bold M ~=~ left [ rpile {
-	1 ~ 0 ~ 0
-above	0 ~ 1 ~ 0
-above	0 ~ 0 ~ 1
-} right ]
-.EN
-.SH
-Determinant
-.P1
-double detm(Matrix M)
-.P2
-.EQ
-det( bold M ) ~=~ lpile {
-			m sub 00 ( m sub 11 m sub 22 - m sub 12 m sub 21 ) +
-above			m sub 01 ( m sub 12 m sub 20 - m sub 10 m sub 22 ) +
-above			m sub 02 ( m sub 10 m sub 21 - m sub 11 m sub 20 )
-}
-.EN
-.NH 2
-Matrix3
-.SH
-Addition
-.P1
-void addm3(Matrix3 A, Matrix3 B)
-.P2
-.EQ
-( bold A + bold B ) sub {i,j} ~=~ bold A sub {i,j} + bold B sub {i,j}
-.EN
-.SH
-Substraction
-.P1
-void subm3(Matrix3 A, Matrix3 B)
-.P2
-.EQ
-( bold A - bold B ) sub {i,j} ~=~ bold A sub {i,j} - bold B sub {i,j}
-.EN
-.SH
-Multiplication
-.P1
-void mulm3(Matrix3 A, Matrix3 B)
-.P2
-.EQ
-left [ bold A bold B right ] sub {i,j} ~=~ sum from {k = 0} to 4-1 bold A sub {i,k} bold B sub {k,j}
-.EN
-.SH
-Transpose
-.P1
-void transposem3(Matrix3 M)
-.P2
-.EQ
-( bold M sup T ) sub {i,j} ~=~ bold A sub {j,i}
-.EN
-.SH
-Identity
-.P1
-void identity3(Matrix3 M)
-.P2
-.EQ
-bold M ~=~ left [ rpile {
-	1 ~ 0 ~ 0 ~ 0
-above	0 ~ 1 ~ 0 ~ 0
-above	0 ~ 0 ~ 1 ~ 0
-above	0 ~ 0 ~ 0 ~ 1
-} right ]
-.EN
-.SH
-Determinant
-.P1
-double detm3(Matrix3 M)
-.P2
-.EQ
-det( bold M ) ~=~ rpile {
-		  m sub 00 ( m sub 11 ( m sub 22 m sub 33 - m sub 23 m sub 32 ) +
-			     m sub 12 ( m sub 23 m sub 31 - m sub 21 m sub 33 ) +
-			     m sub 13 ( m sub 21 m sub 32 - m sub 22 m sub 31 ) )
-above		 -m sub 01 ( m sub 10 ( m sub 22 m sub 33 - m sub 23 m sub 32 ) +
-			     m sub 12 ( m sub 23 m sub 30 - m sub 20 m sub 33 ) +
-			     m sub 13 ( m sub 20 m sub 32 - m sub 22 m sub 30 ) )
-above		 +m sub 02 ( m sub 10 ( m sub 21 m sub 33 - m sub 23 m sub 31 ) +
-			     m sub 11 ( m sub 23 m sub 30 - m sub 20 m sub 33 ) +
-			     m sub 13 ( m sub 20 m sub 31 - m sub 21 m sub 30 ) )
-above		 -m sub 03 ( m sub 10 ( m sub 21 m sub 32 - m sub 22 m sub 31 ) +
-			     m sub 11 ( m sub 22 m sub 30 - m sub 20 m sub 32 ) +
-			     m sub 12 ( m sub 20 m sub 31 - m sub 21 m sub 30 ) )
-}
-.EN
-.NH 2
-Quaternion
-.SH
-Addition
-.P1
-Quaternion addq(Quaternion q, Quaternion r)
-.P2
-.EQ
-q + r ~=~ ( r sub q + r sub r ,~ i sub q + i sub r ,~ j sub q + j sub r ,~ k sub q + k sub r )
-.EN
-.SH
-Substraction
-.P1
-Quaternion subq(Quaternion q, Quaternion r)
-.P2
-.EQ
-q - r ~=~ ( r sub q - r sub r ,~ i sub q - i sub r ,~ j sub q - j sub r ,~ k sub q - k sub r )
-.EN
-.SH
-Multiplication
-.P1
-Quaternion mulq(Quaternion q, Quaternion r)
-.P2
-.EQ
-q ~=~ [ r sub q ,~ v vec sub q ]
-r ~=~ [ r sub r ,~ v vec sub r ]
-qr ~=~ [ r sub q r sub r - v vec sub q • v vec sub r ,~ v vec sub r r sub q + v vec sub q r sub r + v vec sub q X v vec sub r ]
-.EN
-.SH
-Scalar Multiplication
-.P1
-Quaternion smulq(Quaternion q, double s)
-.P2
-.EQ
-qs ~=~ [ r sub q s ,~ i sub q s ,~ j sub q s ,~ k sub q s ]
-.EN
-.SH
-Inverse
-.P1
-Quaternion invq(Quaternion q)
-.P2
-.EQ
-q sup -1 ~=~ left ( r over {| q | sup 2} ,~ -i over {| q | sup 2} ,~ -j over {| q | sup 2} ,~ -k over {| q | sup 2} right )
-.EN
-.SH
-Magnitude/Length
-.P1
-double qlen(Quaternion q)
-.P2
-.EQ
-| q | ~=~ sqrt { r sup 2 + i sup 2 + j sup 2 + k sup 2 }
-.EN
-.NH 2
-RFrame
-.SH
-Change of reference
-.P1
-Point2 rframexform(Point2 p, RFrame rf)
-.P2
-.NH 2
-RFrame3
-.SH
-Change of reference
-.P1
-Point3 rframexform3(Point3 p, RFrame3 rf)
-.P2
diff --git a/libgeometry/doc/libgeometry.pdf b/libgeometry/doc/libgeometry.pdf
deleted file mode 100644
index 3a49480..0000000
--- a/libgeometry/doc/libgeometry.pdf
+++ /dev/null
diff --git a/libgeometry/doc/libgeometry.ps b/libgeometry/doc/libgeometry.ps
deleted file mode 100644
index 635b9cd..0000000
--- a/libgeometry/doc/libgeometry.ps
+++ /dev/null
@@ -1,2799 +0,0 @@
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-	/parenleftex		[-20 -170 0 0]
-	/integral		[100 -50 500 0]
-	/infinity		[10 -75 730 0]
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-
-/S1defs [
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-	/endash			[7 90 650 0]
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-% Tries to round clipping path dimensions, as stored in array pagebbox, so they
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-%
-
-/roundpagebbox {
-    7 dict begin
-	/papersizes [8.5 inch 11 inch 14 inch 17 inch] def
-
-	/mappapersize {
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-		diff slop lt {papersizes j get} {val} ifelse
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-
-	pagebbox 0 0 put
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-	pagebbox dup 2 get mappapersize 2 exch put
-	pagebbox dup 3 get mappapersize 3 exch put
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-%
-% Encoding vector and redefinition of findfont for the ISO Latin1 standard.
-% The 18 characters missing from ROM based fonts on older printers are noted
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-	/plus
-	/comma
-	/minus
-	/period
-	/slash
-	/zero
-	/one
-	/two
-	/three
-	/four
-	/five
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-	/seven
-	/eight
-	/nine
-	/colon
-	/semicolon
-	/less
-	/equal
-	/greater
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-	/at
-	/A
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-	/D
-	/E
-	/F
-	/G
-	/H
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-	/backslash
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-	/underscore
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-	/a
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-	/c
-	/d
-	/e
-	/f
-	/g
-	/h
-	/i
-	/j
-	/k
-	/l
-	/m
-	/n
-	/o
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-	/q
-	/r
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-	/u
-	/v
-	/w
-	/x
-	/y
-	/z
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-	/bar
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-	/.notdef
-	/dotlessi
-	/grave
-	/acute
-	/circumflex
-	/tilde
-	/macron
-	/breve
-	/dotaccent
-	/dieresis
-	/.notdef
-	/ring
-	/cedilla
-	/.notdef
-	/hungarumlaut
-	/ogonek
-	/caron
-	/space
-	/exclamdown
-	/cent
-	/sterling
-	/currency
-	/yen
-	/brokenbar		% missing
-	/section
-	/dieresis
-	/copyright
-	/ordfeminine
-	/guillemotleft
-	/logicalnot
-	/hyphen
-	/registered
-	/macron
-	/degree			% missing
-	/plusminus		% missing
-	/twosuperior		% missing
-	/threesuperior		% missing
-	/acute
-	/mu			% missing
-	/paragraph
-	/periodcentered
-	/cedilla
-	/onesuperior		% missing
-	/ordmasculine
-	/guillemotright
-	/onequarter		% missing
-	/onehalf		% missing
-	/threequarters		% missing
-	/questiondown
-	/Agrave
-	/Aacute
-	/Acircumflex
-	/Atilde
-	/Adieresis
-	/Aring
-	/AE
-	/Ccedilla
-	/Egrave
-	/Eacute
-	/Ecircumflex
-	/Edieresis
-	/Igrave
-	/Iacute
-	/Icircumflex
-	/Idieresis
-	/Eth			% missing
-	/Ntilde
-	/Ograve
-	/Oacute
-	/Ocircumflex
-	/Otilde
-	/Odieresis
-	/multiply		% missing
-	/Oslash
-	/Ugrave
-	/Uacute
-	/Ucircumflex
-	/Udieresis
-	/Yacute			% missing
-	/Thorn			% missing
-	/germandbls
-	/agrave
-	/aacute
-	/acircumflex
-	/atilde
-	/adieresis
-	/aring
-	/ae
-	/ccedilla
-	/egrave
-	/eacute
-	/ecircumflex
-	/edieresis
-	/igrave
-	/iacute
-	/icircumflex
-	/idieresis
-	/eth			% missing
-	/ntilde
-	/ograve
-	/oacute
-	/ocircumflex
-	/otilde
-	/odieresis
-	/divide			% missing
-	/oslash
-	/ugrave
-	/uacute
-	/ucircumflex
-	/udieresis
-	/yacute			% missing
-	/thorn			% missing
-	/ydieresis
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-
-/NewFontDirectory FontDirectory maxlength dict def
-
-%
-% Apparently no guarantee findfont is defined in systemdict so the obvious
-%
-%	systemdict /findfont get exec
-%
-% can generate an error. So far the only exception is a VT600 (version 48.0).
-%
-
-userdict /@RealFindfont known not {
-	userdict begin
-		/@RealFindfont systemdict begin /findfont load end def
-	end
-} if
-
-/findfont {
-	dup NewFontDirectory exch known not {
-		dup
-		%dup systemdict /findfont get exec	% not always in systemdict
-		dup userdict /@RealFindfont get exec
-		dup /Encoding get StandardEncoding eq {
-			dup length dict begin
-				{1 index /FID ne {def}{pop pop} ifelse} forall
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-		NewFontDirectory 3 1 roll put
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-
-%%Patch from lp
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-setup
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-12 /LucidaSans-Demi f
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-10 /LucidaSans-Italic f
-(Rodrigo G. L\363pez) 2469 1480 w
-(rgl@antares-labs.eu) 2377 1760 w
-10 /LucidaSansUnicode00 f
-(Antares Telecom Laboratories) 2156 1960 w
-(Albatera, Alicante) 2451 2100 w
-10 /LucidaSans-Demi f
-(1.) 720 2700 w
-(Data Structures) 873 2700 w
-(1.1.) 720 2940 w
-(Point2) 962 2940 w
-9 /LucidaTypewriter f
-(struct) 920 3110 w
-(Point2) 1375 3110 w
-({) 1830 3110 w
-(double) 1440 3220 w
-(x,) 1895 3220 w
-(y,) 2090 3220 w
-(w;) 2285 3220 w
-(};) 920 3330 w
-10 /LucidaSans-Italic f
-(Point2) 970 3546 w
-10 /LucidaSansUnicode00 f
-(represents) 1324 3546 w
-(a) 1886 3546 w
-(point) 1989 3546 w
-(in) 2289 3546 w
-(two-dimensional) 2428 3546 w
-(projective) 3299 3546 w
-(space,) 3823 3546 w
-(which) 4179 3546 w
-(itself) 4508 3546 w
-(is) 4795 3546 w
-(an) 4923 3546 w
-(extension) 720 3666 w
-(of) 1240 3666 w
-(the) 1383 3666 w
-(two-dimensional) 1583 3666 w
-(euclidean) 2451 3666 w
-(space) 2959 3666 w
-(that) 3280 3666 w
-(allows) 3516 3666 w
-(us) 3862 3666 w
-(to) 4019 3666 w
-(work) 4161 3666 w
-(with) 4442 3666 w
-(vectors) 4691 3666 w
-(and compose affine transformations in a friendly manner.) 720 3786 w
-(A point) 3589 3786 w
-(\() 2696 3966 w
-(x) 2737 3966 w
-(,) 2806 3966 w
-(y) 2846 3966 w
-(,) 2906 3966 w
-(w) 2946 3966 w
-(\)) 3031 3966 w
-(made) 720 4146 w
-(out) 1027 4146 w
-(of) 1227 4146 w
-(homogenous) 1365 4146 w
-(coordinates) 2036 4146 w
-10 /LucidaSans-Italic f
-(x) 2643 4146 w
-10 /LucidaSansUnicode00 f
-(,) 2697 4146 w
-10 /LucidaSans-Italic f
-(y) 2769 4146 w
-10 /LucidaSansUnicode00 f
-(,) 2824 4146 w
-(and) 2896 4146 w
-10 /LucidaSans-Italic f
-(w) 3116 4146 w
-10 /LucidaSansUnicode00 f
-(,) 3194 4146 w
-(yields) 3267 4146 w
-(a) 3588 4146 w
-(point) 3684 4146 w
-(with) 3977 4146 w
-(cartesian) 4223 4146 w
-(coordi\255) 4701 4146 w
-(nates) 720 4266 w
-(\() 2588 4446 w
-(x) 2629 4446 w
-(/) 2698 4446 w
-(w) 2759 4446 w
-(,) 2844 4446 w
-(y) 2884 4446 w
-(/) 2944 4446 w
-(w) 3005 4446 w
-(\)) 3090 4446 w
-(.) 3139 4446 w
-10 /LucidaSans-Demi f
-(1.2.) 720 4746 w
-(Point3) 962 4746 w
-9 /LucidaTypewriter f
-(struct) 920 4916 w
-(Point3) 1375 4916 w
-({) 1830 4916 w
-(double) 1440 5026 w
-(x,) 1895 5026 w
-(y,) 2090 5026 w
-(z,) 2285 5026 w
-(w;) 2480 5026 w
-(};) 920 5136 w
-10 /LucidaSans-Italic f
-(Point3) 970 5352 w
-10 /LucidaSansUnicode00 f
-(is a point in three-dimensional projective space.) 1309 5352 w
-10 /LucidaSans-Demi f
-(1.3.) 720 5592 w
-(Matrix) 962 5592 w
-9 /LucidaTypewriter f
-(typedef) 920 5762 w
-(double) 1440 5762 w
-(Matrix[3][3];) 1895 5762 w
-10 /LucidaSans-Italic f
-(Matrix) 970 5978 w
-10 /LucidaSansUnicode00 f
-(represents) 1341 5978 w
-(a) 1914 5978 w
-(3x3) 2028 5978 w
-(matrix,) 2274 5978 w
-(thought) 2681 5978 w
-(to) 3123 5978 w
-(compose) 3280 5978 w
-(affine) 3775 5978 w
-(transformations) 4110 5978 w
-(to) 4942 5978 w
-(apply to homogeneous 2D points.) 720 6098 w
-10 /LucidaSans-Demi f
-(1.4.) 720 6338 w
-(Matrix3) 962 6338 w
-9 /LucidaTypewriter f
-(typedef) 920 6508 w
-(double) 1440 6508 w
-(Matrix3[4][4];) 1895 6508 w
-10 /LucidaSans-Italic f
-(Matrix3) 970 6724 w
-10 /LucidaSansUnicode00 f
-(represents) 1398 6724 w
-(a) 1964 6724 w
-(4x4) 2071 6724 w
-(matrix,) 2310 6724 w
-(thought) 2711 6724 w
-(to) 3147 6724 w
-(compose) 3298 6724 w
-(affine) 3787 6724 w
-(transformations) 4116 6724 w
-(to) 4942 6724 w
-(apply to homogeneous 3D points.) 720 6844 w
-8 /S1 f
-(__________________) 720 6980 w
-8 /LucidaSansUnicode00 f
-(ACHTUNG!) 720 7080 w
-(this) 1163 7080 w
-(is) 1333 7080 w
-(a) 1423 7080 w
-8 /LucidaSans-Demi f
-(WORK) 1493 7080 w
-(IN) 1769 7080 w
-(PROGRESS) 1883 7080 w
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-showpage
-saveobj restore
-%%EndPage: 1 1
-%%Page: 2 2
-/saveobj save def
-mark
-2 pagesetup
-10 /LucidaSansUnicode00 f
-(\255 2 \255) 2783 480 w
-10 /LucidaSans-Demi f
-(1.5.) 720 840 w
-(Quaternion) 962 840 w
-9 /LucidaTypewriter f
-(struct) 920 1010 w
-(Quaternion) 1375 1010 w
-({) 2090 1010 w
-(double) 1440 1120 w
-(r,) 1895 1120 w
-(i,) 2090 1120 w
-(j,) 2285 1120 w
-(k;) 2480 1120 w
-(};) 920 1230 w
-10 /LucidaSans-Italic f
-(Quaternions) 970 1446 w
-10 /LucidaSansUnicode00 f
-(are) 1623 1446 w
-(a) 1829 1446 w
-(numbering) 1938 1446 w
-(system) 2522 1446 w
-(that) 2916 1446 w
-(extends) 3161 1446 w
-(the) 3601 1446 w
-(complex) 3810 1446 w
-(numbers) 4279 1446 w
-(up) 4762 1446 w
-(to) 4942 1446 w
-(four-dimensional) 720 1566 w
-(space,) 1607 1566 w
-(and) 1953 1566 w
-(are) 2171 1566 w
-(used) 2361 1566 w
-(to) 2631 1566 w
-(apply) 2767 1566 w
-(rotations) 3067 1566 w
-(and) 3539 1566 w
-(model) 3757 1566 w
-(mechanical) 4096 1566 w
-(interac\255) 4676 1566 w
-(tions) 720 1686 w
-(in) 1015 1686 w
-(3D) 1161 1686 w
-(space.) 1354 1686 w
-(Their) 1749 1686 w
-(main) 2055 1686 w
-(advantages) 2349 1686 w
-(with) 2952 1686 w
-(respect) 3212 1686 w
-(to) 3622 1686 w
-(their) 3775 1686 w
-(matrix) 4055 1686 w
-(relatives) 4426 1686 w
-(are) 4888 1686 w
-(increased computational and storage performance and gimbal lock avoidance.) 720 1806 w
-10 /LucidaSans-Demi f
-(2.) 720 2046 w
-(Algorithms) 873 2046 w
-(2.1.) 720 2286 w
-(Point2) 962 2286 w
-(Addition) 720 2526 w
-9 /LucidaTypewriter f
-(Point2) 920 2696 w
-(addpt2\(Point2) 1375 2696 w
-(a,) 2285 2696 w
-(Point2) 2480 2696 w
-(b\)) 2935 2696 w
-10 /LucidaSansUnicode00 f
-(a) 2051 2971 w
-10 /S f
-(+) 2122 2971 w
-10 /LucidaSansUnicode00 f
-(b) 2193 2971 w
-10 /S f
-(=) 2312 2971 w
-10 /LucidaSansUnicode00 f
-10 /S f
-(\354) 2431 2934 w
-(\356) 2431 3034 w
-10 /LucidaSansUnicode00 f
-(x) 2480 2971 w
-7 /LucidaSansUnicode00 f
-(a) 2552 2991 w
-10 /S f
-(+) 2615 2971 w
-10 /LucidaSansUnicode00 f
-(x) 2686 2971 w
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-(b) 2758 2991 w
-10 /LucidaSansUnicode00 f
-(,) 2818 2971 w
-(y) 2898 2971 w
-7 /LucidaSansUnicode00 f
-(a) 2961 2991 w
-10 /S f
-(+) 3024 2971 w
-10 /LucidaSansUnicode00 f
-(y) 3095 2971 w
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-(b) 3158 2991 w
-10 /LucidaSansUnicode00 f
-(,) 3218 2971 w
-(w) 3298 2971 w
-7 /LucidaSansUnicode00 f
-(a) 3386 2991 w
-10 /S f
-(+) 3449 2971 w
-10 /LucidaSansUnicode00 f
-(w) 3520 2971 w
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-(b) 3608 2991 w
-10 /S f
-(\374) 3660 2934 w
-(\376) 3660 3034 w
-10 /LucidaSans-Demi f
-(Substraction) 720 3326 w
-9 /LucidaTypewriter f
-(Point2) 920 3496 w
-(subpt2\(Point2) 1375 3496 w
-(a,) 2285 3496 w
-(Point2) 2480 3496 w
-(b\)) 2935 3496 w
-10 /LucidaSansUnicode00 f
-(a) 2051 3771 w
-10 /S f
-(-) 2122 3771 w
-10 /LucidaSansUnicode00 f
-(b) 2193 3771 w
-10 /S f
-(=) 2312 3771 w
-10 /LucidaSansUnicode00 f
-10 /S f
-(\354) 2431 3734 w
-(\356) 2431 3834 w
-10 /LucidaSansUnicode00 f
-(x) 2480 3771 w
-7 /LucidaSansUnicode00 f
-(a) 2552 3791 w
-10 /S f
-(-) 2615 3771 w
-10 /LucidaSansUnicode00 f
-(x) 2686 3771 w
-7 /LucidaSansUnicode00 f
-(b) 2758 3791 w
-10 /LucidaSansUnicode00 f
-(,) 2818 3771 w
-(y) 2898 3771 w
-7 /LucidaSansUnicode00 f
-(a) 2961 3791 w
-10 /S f
-(-) 3024 3771 w
-10 /LucidaSansUnicode00 f
-(y) 3095 3771 w
-7 /LucidaSansUnicode00 f
-(b) 3158 3791 w
-10 /LucidaSansUnicode00 f
-(,) 3218 3771 w
-(w) 3298 3771 w
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-(a) 3386 3791 w
-10 /S f
-(-) 3449 3771 w
-10 /LucidaSansUnicode00 f
-(w) 3520 3771 w
-7 /LucidaSansUnicode00 f
-(b) 3608 3791 w
-10 /S f
-(\374) 3660 3734 w
-(\376) 3660 3834 w
-10 /LucidaSans-Demi f
-(Multiplication) 720 4126 w
-9 /LucidaTypewriter f
-(Point2) 920 4296 w
-(mulpt2\(Point2) 1375 4296 w
-(p,) 2285 4296 w
-(double) 2480 4296 w
-(s\)) 2935 4296 w
-10 /LucidaSansUnicode00 f
-(p) 2395 4536 w
-(*) 2466 4536 w
-(s) 2522 4536 w
-10 /S f
-(=) 2629 4536 w
-10 /LucidaSansUnicode00 f
-10 /S f
-(\354) 2748 4499 w
-(\356) 2748 4599 w
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-(xs) 2797 4546 w
-(,) 2917 4546 w
-(ys) 2997 4546 w
-(,) 3108 4546 w
-(ws) 3188 4546 w
-10 /S f
-(\374) 3316 4499 w
-(\376) 3316 4599 w
-10 /LucidaSans-Demi f
-(Division) 720 4841 w
-9 /LucidaTypewriter f
-(Point2) 920 5011 w
-(divpt2\(Point2) 1375 5011 w
-(p,) 2285 5011 w
-(double) 2480 5011 w
-(s\)) 2935 5011 w
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-(p) 2394 5336 w
-(/) 2465 5336 w
-(s) 2526 5336 w
-10 /S f
-(=) 2633 5336 w
-10 /LucidaSansUnicode00 f
-10 /S f
-(\354) 2752 5249 w
-(\357) 2752 5349 w
-(\356) 2752 5449 w
-10 /LucidaSansUnicode00 f
-(s) 2831 5406 w
-(x) 2826 5276 w
-10 /S1 f
-(_) 2811 5306 w
-(_) 2852 5306 w
-10 /LucidaSansUnicode00 f
-(,) 2920 5336 w
-(s) 3025 5406 w
-(y) 3025 5276 w
-10 /S1 f
-(_) 3010 5306 w
-(_) 3042 5306 w
-10 /LucidaSansUnicode00 f
-(,) 3110 5336 w
-(s) 3228 5406 w
-(w) 3215 5276 w
-10 /S1 f
-(_) 3200 5306 w
-(__) 3207 5306 w
-10 /S f
-(\374) 3317 5249 w
-(\357) 3317 5349 w
-(\376) 3317 5449 w
-10 /LucidaSans-Demi f
-(Vector Dot Product) 720 5741 w
-9 /LucidaTypewriter f
-(double) 920 5911 w
-(dotvec2\(Point2) 1375 5911 w
-(a,) 2350 5911 w
-(Point2) 2545 5911 w
-(b\)) 3000 5911 w
-10 /LucidaSansUnicode00 f
-(a) 2375 6156 w
-7 /LucidaSansUnicode21 f
-(\222) 2370 6106 w
-10 /LucidaSansUnicode00 f
-10 /LucidaSansUnicode20 f
-(") 2479 6156 w
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-(b) 2583 6156 w
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-(\222) 2582 6081 w
-10 /LucidaSansUnicode00 f
-10 /S f
-(=) 2703 6156 w
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-(x) 2814 6156 w
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-(a) 2886 6176 w
-10 /LucidaSansUnicode00 f
-(x) 2941 6156 w
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-(b) 3013 6176 w
-10 /S f
-(+) 3081 6156 w
-10 /LucidaSansUnicode00 f
-(y) 3152 6156 w
-7 /LucidaSansUnicode00 f
-(a) 3215 6176 w
-10 /LucidaSansUnicode00 f
-(y) 3270 6156 w
-7 /LucidaSansUnicode00 f
-(b) 3333 6176 w
-10 /LucidaSans-Demi f
-(Vector Magnitude/Length) 720 6456 w
-9 /LucidaTypewriter f
-(double) 920 6626 w
-(vec2len\(Point2) 1375 6626 w
-(v\)) 2350 6626 w
-10 /LucidaSansUnicode00 f
-(|) 2509 6901 w
-(v) 2557 6884 w
-7 /LucidaSansUnicode21 f
-(\222) 2550 6834 w
-10 /LucidaSansUnicode00 f
-(|) 2609 6901 w
-10 /S f
-(=) 2705 6884 w
-10 /LucidaSansUnicode00 f
-12 /LucidaSansUnicode22 f
-(\032) 2816 6884 w
-12 /S f
-(`) 2913 6884 w
-(`````) 2943 6884 w
-10 /LucidaSansUnicode00 f
-(x) 2921 6884 w
-7 /LucidaSansUnicode00 f
-(2) 2987 6844 w
-10 /S f
-(+) 3055 6884 w
-10 /LucidaSansUnicode00 f
-(y) 3126 6884 w
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-(2) 3183 6844 w
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-10 /LucidaSansUnicode00 f
-(\255 3 \255) 2783 480 w
-10 /LucidaSans-Demi f
-(Vector Normalization) 720 840 w
-9 /LucidaTypewriter f
-(Point2) 920 1010 w
-(normvec2\(Point2) 1375 1010 w
-(v\)) 2415 1010 w
-10 /LucidaSansUnicode00 f
-(n) 2502 1335 w
-7 /LucidaSansUnicode21 f
-(\222) 2500 1285 w
-10 /LucidaSansUnicode00 f
-10 /S f
-(=) 2620 1335 w
-10 /LucidaSansUnicode00 f
-10 /S f
-(\354) 2739 1248 w
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diff --git a/libgeometry/doc/mkfile b/libgeometry/doc/mkfile
deleted file mode 100644
index 8fb6d1c..0000000
--- a/libgeometry/doc/mkfile
+++ /dev/null
@@ -1,15 +0,0 @@
-FONTS='.FP lucidasans'
-DOCNAME=libgeometry
-
-all:VQ: $DOCNAME.ps $DOCNAME.pdf
-
-clean:VQ:
-	rm -f $DOCNAME.ps $DOCNAME.pdf
-
-$DOCNAME.ps:V: $DOCNAME.ms
-	{echo $FONTS; cat $prereq}> _$prereq
-	eval `{doctype _$prereq} | lp -dstdout > $target && rm -f _$prereq
-
-$DOCNAME.pdf:V: $DOCNAME.ps
-	cat /sys/doc/docfonts $prereq > _$prereq
-	ps2pdf _$prereq $target && rm -f _$prereq
diff --git a/libgeometry/matrix.c b/libgeometry/matrix.c
deleted file mode 100644
index b7efc84..0000000
--- a/libgeometry/matrix.c
+++ /dev/null
@@ -1,348 +0,0 @@
-#include <u.h>
-#include <libc.h>
-#include "../geometry.h"
-
-/* 2D */
-
-void
-identity(Matrix m)
-{
-	memset(m, 0, 3*3*sizeof(double));
-	m[0][0] = m[1][1] = m[2][2] = 1;
-}
-
-void
-addm(Matrix a, Matrix b)
-{
-	int i, j;
-
-	for(i = 0; i < 3; i++)
-		for(j = 0; j < 3; j++)
-			a[i][j] += b[i][j];
-}
-
-void
-subm(Matrix a, Matrix b)
-{
-	int i, j;
-
-	for(i = 0; i < 3; i++)
-		for(j = 0; j < 3; j++)
-			a[i][j] -= b[i][j];
-}
-
-void
-mulm(Matrix a, Matrix b)
-{
-	int i, j, k;
-	Matrix tmp;
-
-	for(i = 0; i < 3; i++)
-		for(j = 0; j < 3; j++){
-			tmp[i][j] = 0;
-			for(k = 0; k < 3; k++)
-				tmp[i][j] += a[i][k]*b[k][j];
-		}
-	memmove(a, tmp, 3*3*sizeof(double));
-}
-
-void
-smulm(Matrix m, double s)
-{
-	int i, j;
-
-	for(i = 0; i < 3; i++)
-		for(j = 0; j < 3; j++)
-			m[i][j] *= s;
-}
-
-void
-transposem(Matrix m)
-{
-	int i, j;
-	double tmp;
-
-	for(i = 0; i < 3; i++)
-		for(j = i; j < 3; j++){
-			tmp = m[i][j];
-			m[i][j] = m[j][i];
-			m[j][i] = tmp;
-		}
-}
-
-double
-detm(Matrix m)
-{
-	return m[0][0]*(m[1][1]*m[2][2] - m[1][2]*m[2][1])+
-	       m[0][1]*(m[1][2]*m[2][0] - m[1][0]*m[2][2])+
-	       m[0][2]*(m[1][0]*m[2][1] - m[1][1]*m[2][0]);
-}
-
-double
-tracem(Matrix m)
-{
-	return m[0][0] + m[1][1] + m[2][2];
-}
-
-void
-adjm(Matrix m)
-{
-	Matrix tmp;
-
-	tmp[0][0] =  m[1][1]*m[2][2] - m[1][2]*m[2][1];
-	tmp[0][1] = -m[0][1]*m[2][2] + m[0][2]*m[2][1];
-	tmp[0][2] =  m[0][1]*m[1][2] - m[0][2]*m[1][1];
-	tmp[1][0] = -m[1][0]*m[2][2] + m[1][2]*m[2][0];
-	tmp[1][1] =  m[0][0]*m[2][2] - m[0][2]*m[2][0];
-	tmp[1][2] = -m[0][0]*m[1][2] + m[0][2]*m[1][0];
-	tmp[2][0] =  m[1][0]*m[2][1] - m[1][1]*m[2][0];
-	tmp[2][1] = -m[0][0]*m[2][1] + m[0][1]*m[2][0];
-	tmp[2][2] =  m[0][0]*m[1][1] - m[0][1]*m[1][0];
-	memmove(m, tmp, 3*3*sizeof(double));
-}
-
-/* Cayley-Hamilton */
-//void
-//invertm(Matrix m)
-//{
-//	Matrix m², r;
-//	double det, trm, trm²;
-//
-//	det = detm(m);
-//	if(det == 0)
-//		return;
-//	trm = tracem(m);
-//	memmove(m², m, 3*3*sizeof(double));
-//	mulm(m², m²);
-//	trm² = tracem(m²);
-//	identity(r);
-//	smulm(r, (trm*trm - trm²)/2);
-//	smulm(m, trm);
-//	subm(r, m);
-//	addm(r, m²);
-//	smulm(r, 1/det);
-//	memmove(m, r, 3*3*sizeof(double));
-//}
-
-/* Cramer's */
-void
-invm(Matrix m)
-{
-	double det;
-
-	det = detm(m);
-	if(det == 0)
-		return; /* singular matrices are not invertible */
-	adjm(m);
-	smulm(m, 1/det);
-}
-
-Point2
-xform(Point2 p, Matrix m)
-{
-	return (Point2){
-		p.x*m[0][0] + p.y*m[0][1] + p.w*m[0][2],
-		p.x*m[1][0] + p.y*m[1][1] + p.w*m[1][2],
-		p.x*m[2][0] + p.y*m[2][1] + p.w*m[2][2]
-	};
-}
-
-/* 3D */
-
-void
-identity3(Matrix3 m)
-{
-	memset(m, 0, 4*4*sizeof(double));
-	m[0][0] = m[1][1] = m[2][2] = m[3][3] = 1;
-}
-
-void
-addm3(Matrix3 a, Matrix3 b)
-{
-	int i, j;
-
-	for(i = 0; i < 4; i++)
-		for(j = 0; j < 4; j++)
-			a[i][j] += b[i][j];
-}
-
-void
-subm3(Matrix3 a, Matrix3 b)
-{
-	int i, j;
-
-	for(i = 0; i < 4; i++)
-		for(j = 0; j < 4; j++)
-			a[i][j] -= b[i][j];
-}
-
-void
-mulm3(Matrix3 a, Matrix3 b)
-{
-	int i, j, k;
-	Matrix3 tmp;
-
-	for(i = 0; i < 4; i++)
-		for(j = 0; j < 4; j++){
-			tmp[i][j] = 0;
-			for(k = 0; k < 4; k++)
-				tmp[i][j] += a[i][k]*b[k][j];
-		}
-	memmove(a, tmp, 4*4*sizeof(double));
-}
-
-void
-smulm3(Matrix3 m, double s)
-{
-	int i, j;
-
-	for(i = 0; i < 4; i++)
-		for(j = 0; j < 4; j++)
-			m[i][j] *= s;
-}
-
-void
-transposem3(Matrix3 m)
-{
-	int i, j;
-	double tmp;
-
-	for(i = 0; i < 4; i++)
-		for(j = i; j < 4; j++){
-			tmp = m[i][j];
-			m[i][j] = m[j][i];
-			m[j][i] = tmp;
-		}
-}
-
-double
-detm3(Matrix3 m)
-{
-	return m[0][0]*(m[1][1]*(m[2][2]*m[3][3] - m[2][3]*m[3][2])+
-			m[1][2]*(m[2][3]*m[3][1] - m[2][1]*m[3][3])+
-			m[1][3]*(m[2][1]*m[3][2] - m[2][2]*m[3][1]))
-	      -m[0][1]*(m[1][0]*(m[2][2]*m[3][3] - m[2][3]*m[3][2])+
-			m[1][2]*(m[2][3]*m[3][0] - m[2][0]*m[3][3])+
-			m[1][3]*(m[2][0]*m[3][2] - m[2][2]*m[3][0]))
-	      +m[0][2]*(m[1][0]*(m[2][1]*m[3][3] - m[2][3]*m[3][1])+
-			m[1][1]*(m[2][3]*m[3][0] - m[2][0]*m[3][3])+
-			m[1][3]*(m[2][0]*m[3][1] - m[2][1]*m[3][0]))
-	      -m[0][3]*(m[1][0]*(m[2][1]*m[3][2] - m[2][2]*m[3][1])+
-			m[1][1]*(m[2][2]*m[3][0] - m[2][0]*m[3][2])+
-			m[1][2]*(m[2][0]*m[3][1] - m[2][1]*m[3][0]));
-}
-
-double
-tracem3(Matrix3 m)
-{
-	return m[0][0] + m[1][1] + m[2][2] + m[3][3];
-}
-
-void
-adjm3(Matrix3 m)
-{
-	Matrix3 tmp;
-
-	tmp[0][0]=m[1][1]*(m[2][2]*m[3][3] - m[2][3]*m[3][2])+
-		  m[2][1]*(m[1][3]*m[3][2] - m[1][2]*m[3][3])+
-		  m[3][1]*(m[1][2]*m[2][3] - m[1][3]*m[2][2]);
-	tmp[0][1]=m[0][1]*(m[2][3]*m[3][2] - m[2][2]*m[3][3])+
-		  m[2][1]*(m[0][2]*m[3][3] - m[0][3]*m[3][2])+
-		  m[3][1]*(m[0][3]*m[2][2] - m[0][2]*m[2][3]);
-	tmp[0][2]=m[0][1]*(m[1][2]*m[3][3] - m[1][3]*m[3][2])+
-		  m[1][1]*(m[0][3]*m[3][2] - m[0][2]*m[3][3])+
-		  m[3][1]*(m[0][2]*m[1][3] - m[0][3]*m[1][2]);
-	tmp[0][3]=m[0][1]*(m[1][3]*m[2][2] - m[1][2]*m[2][3])+
-		  m[1][1]*(m[0][2]*m[2][3] - m[0][3]*m[2][2])+
-		  m[2][1]*(m[0][3]*m[1][2] - m[0][2]*m[1][3]);
-	tmp[1][0]=m[1][0]*(m[2][3]*m[3][2] - m[2][2]*m[3][3])+
-		  m[2][0]*(m[1][2]*m[3][3] - m[1][3]*m[3][2])+
-		  m[3][0]*(m[1][3]*m[2][2] - m[1][2]*m[2][3]);
-	tmp[1][1]=m[0][0]*(m[2][2]*m[3][3] - m[2][3]*m[3][2])+
-		  m[2][0]*(m[0][3]*m[3][2] - m[0][2]*m[3][3])+
-		  m[3][0]*(m[0][2]*m[2][3] - m[0][3]*m[2][2]);
-	tmp[1][2]=m[0][0]*(m[1][3]*m[3][2] - m[1][2]*m[3][3])+
-		  m[1][0]*(m[0][2]*m[3][3] - m[0][3]*m[3][2])+
-		  m[3][0]*(m[0][3]*m[1][2] - m[0][2]*m[1][3]);
-	tmp[1][3]=m[0][0]*(m[1][2]*m[2][3] - m[1][3]*m[2][2])+
-		  m[1][0]*(m[0][3]*m[2][2] - m[0][2]*m[2][3])+
-		  m[2][0]*(m[0][2]*m[1][3] - m[0][3]*m[1][2]);
-	tmp[2][0]=m[1][0]*(m[2][1]*m[3][3] - m[2][3]*m[3][1])+
-		  m[2][0]*(m[1][3]*m[3][1] - m[1][1]*m[3][3])+
-		  m[3][0]*(m[1][1]*m[2][3] - m[1][3]*m[2][1]);
-	tmp[2][1]=m[0][0]*(m[2][3]*m[3][1] - m[2][1]*m[3][3])+
-		  m[2][0]*(m[0][1]*m[3][3] - m[0][3]*m[3][1])+
-		  m[3][0]*(m[0][3]*m[2][1] - m[0][1]*m[2][3]);
-	tmp[2][2]=m[0][0]*(m[1][1]*m[3][3] - m[1][3]*m[3][1])+
-		  m[1][0]*(m[0][3]*m[3][1] - m[0][1]*m[3][3])+
-		  m[3][0]*(m[0][1]*m[1][3] - m[0][3]*m[1][1]);
-	tmp[2][3]=m[0][0]*(m[1][3]*m[2][1] - m[1][1]*m[2][3])+
-		  m[1][0]*(m[0][1]*m[2][3] - m[0][3]*m[2][1])+
-		  m[2][0]*(m[0][3]*m[1][1] - m[0][1]*m[1][3]);
-	tmp[3][0]=m[1][0]*(m[2][2]*m[3][1] - m[2][1]*m[3][2])+
-		  m[2][0]*(m[1][1]*m[3][2] - m[1][2]*m[3][1])+
-		  m[3][0]*(m[1][2]*m[2][1] - m[1][1]*m[2][2]);
-	tmp[3][1]=m[0][0]*(m[2][1]*m[3][2] - m[2][2]*m[3][1])+
-		  m[2][0]*(m[0][2]*m[3][1] - m[0][1]*m[3][2])+
-		  m[3][0]*(m[0][1]*m[2][2] - m[0][2]*m[2][1]);
-	tmp[3][2]=m[0][0]*(m[1][2]*m[3][1] - m[1][1]*m[3][2])+
-		  m[1][0]*(m[0][1]*m[3][2] - m[0][2]*m[3][1])+
-		  m[3][0]*(m[0][2]*m[1][1] - m[0][1]*m[1][2]);
-	tmp[3][3]=m[0][0]*(m[1][1]*m[2][2] - m[1][2]*m[2][1])+
-		  m[1][0]*(m[0][2]*m[2][1] - m[0][1]*m[2][2])+
-		  m[2][0]*(m[0][1]*m[1][2] - m[0][2]*m[1][1]);
-	memmove(m, tmp, 4*4*sizeof(double));
-}
-
-/* Cayley-Hamilton */
-//void
-//invertm3(Matrix3 m)
-//{
-//	Matrix3 m², m³, r;
-//	double det, trm, trm², trm³;
-//
-//	det = detm3(m);
-//	if(det == 0)
-//		return;
-//	trm = tracem3(m);
-//	memmove(m³, m, 4*4*sizeof(double));
-//	mulm(m³, m³);
-//	mulm(m³, m);
-//	trm³ = tracem3(m³);
-//	memmove(m², m, 4*4*sizeof(double));
-//	mulm(m², m²);
-//	trm² = tracem3(m²);
-//	identity3(r);
-//	smulm3(r, (trm*trm*trm - 3*trm*trm² + 2*trm³)/6);
-//	smulm3(m, (trm*trm - trm²)/2);
-//	smulm3(m², trm);
-//	subm(r, m);
-//	addm(r, m²);
-//	subm(r, m³);
-//	smulm(r, 1/det);
-//	memmove(m, r, 4*4*sizeof(double));
-//}
-
-/* Cramer's */
-void
-invm3(Matrix3 m)
-{
-	double det;
-
-	det = detm3(m);
-	if(det == 0)
-		return; /* singular matrices are not invertible */
-	adjm3(m);
-	smulm3(m, 1/det);
-}
-
-Point3
-xform3(Point3 p, Matrix3 m)
-{
-	return (Point3){
-		p.x*m[0][0] + p.y*m[0][1] + p.z*m[0][2] + p.w*m[0][3],
-		p.x*m[1][0] + p.y*m[1][1] + p.z*m[1][2] + p.w*m[1][3],
-		p.x*m[2][0] + p.y*m[2][1] + p.z*m[2][2] + p.w*m[2][3],
-		p.x*m[3][0] + p.y*m[3][1] + p.z*m[3][2] + p.w*m[3][3],
-	};
-}
diff --git a/libgeometry/mkfile b/libgeometry/mkfile
deleted file mode 100644
index 5c7d79f..0000000
--- a/libgeometry/mkfile
+++ /dev/null
@@ -1,13 +0,0 @@
-</$objtype/mkfile
-
-LIB=../libgeometry.a$O
-OFILES=\
-	point.$O\
-	matrix.$O\
-	quaternion.$O\
-	rframe.$O\
-	triangle.$O\
-
-HFILES=../geometry.h
-
-</sys/src/cmd/mklib
diff --git a/libgeometry/point.c b/libgeometry/point.c
deleted file mode 100644
index 657eb4c..0000000
--- a/libgeometry/point.c
+++ /dev/null
@@ -1,161 +0,0 @@
-#include <u.h>
-#include <libc.h>
-#include "../geometry.h"
-
-/* 2D */
-
-Point2
-Pt2(double x, double y, double w)
-{
-	return (Point2){x, y, w};
-}
-
-Point2
-Vec2(double x, double y)
-{
-	return (Point2){x, y, 0};
-}
-
-Point2
-addpt2(Point2 a, Point2 b)
-{
-	return (Point2){a.x+b.x, a.y+b.y, a.w+b.w};
-}
-
-Point2
-subpt2(Point2 a, Point2 b)
-{
-	return (Point2){a.x-b.x, a.y-b.y, a.w-b.w};
-}
-
-Point2
-mulpt2(Point2 p, double s)
-{
-	return (Point2){p.x*s, p.y*s, p.w*s};
-}
-
-Point2
-divpt2(Point2 p, double s)
-{
-	return (Point2){p.x/s, p.y/s, p.w/s};
-}
-
-Point2
-lerp2(Point2 a, Point2 b, double t)
-{
-	if(t < 0) t = 0;
-	if(t > 1) t = 1;
-	return (Point2){
-		(1 - t)*a.x + t*b.x,
-		(1 - t)*a.y + t*b.y,
-		(1 - t)*a.w + t*b.w
-	};
-}
-
-double
-dotvec2(Point2 a, Point2 b)
-{
-	return a.x*b.x + a.y*b.y;
-}
-
-double
-vec2len(Point2 v)
-{
-	return sqrt(dotvec2(v, v));
-}
-
-Point2
-normvec2(Point2 v)
-{
-	double len;
-
-	len = vec2len(v);
-	if(len == 0)
-		return (Point2){0, 0, 0};
-	return (Point2){v.x/len, v.y/len, 0};
-}
-
-/* 3D */
-
-Point3
-Pt3(double x, double y, double z, double w)
-{
-	return (Point3){x, y, z, w};
-}
-
-Point3
-Vec3(double x, double y, double z)
-{
-	return (Point3){x, y, z, 0};
-}
-
-Point3
-addpt3(Point3 a, Point3 b)
-{
-	return (Point3){a.x+b.x, a.y+b.y, a.z+b.z, a.w+b.w};
-}
-
-Point3
-subpt3(Point3 a, Point3 b)
-{
-	return (Point3){a.x-b.x, a.y-b.y, a.z-b.z, a.w-b.w};
-}
-
-Point3
-mulpt3(Point3 p, double s)
-{
-	return (Point3){p.x*s, p.y*s, p.z*s, p.w*s};
-}
-
-Point3
-divpt3(Point3 p, double s)
-{
-	return (Point3){p.x/s, p.y/s, p.z/s, p.w/s};
-}
-
-Point3
-lerp3(Point3 a, Point3 b, double t)
-{
-	if(t < 0) t = 0;
-	if(t > 1) t = 1;
-	return (Point3){
-		(1 - t)*a.x + t*b.x,
-		(1 - t)*a.y + t*b.y,
-		(1 - t)*a.z + t*b.z,
-		(1 - t)*a.w + t*b.w
-	};
-}
-
-double
-dotvec3(Point3 a, Point3 b)
-{
-	return a.x*b.x + a.y*b.y + a.z*b.z;
-}
-
-Point3
-crossvec3(Point3 a, Point3 b)
-{
-	return (Point3){
-		a.y*b.z - a.z*b.y,
-		a.z*b.x - a.x*b.z,
-		a.x*b.y - a.y*b.x,
-		0
-	};
-}
-
-double
-vec3len(Point3 v)
-{
-	return sqrt(dotvec3(v, v));
-}
-
-Point3
-normvec3(Point3 v)
-{
-	double len;
-
-	len = vec3len(v);
-	if(len == 0)
-		return (Point3){0, 0, 0, 0};
-	return (Point3){v.x/len, v.y/len, v.z/len, 0};
-}
diff --git a/libgeometry/quaternion.c b/libgeometry/quaternion.c
deleted file mode 100644
index b8eaa88..0000000
--- a/libgeometry/quaternion.c
+++ /dev/null
@@ -1,90 +0,0 @@
-#include <u.h>
-#include <libc.h>
-#include "../geometry.h"
-
-Quaternion
-Quat(double r, double i, double j, double k)
-{
-	return (Quaternion){r, i, j, k};
-}
-
-Quaternion
-Quatvec(double s, Point3 v)
-{
-	return (Quaternion){s, v.x, v.y, v.z};
-}
-
-Quaternion
-addq(Quaternion a, Quaternion b)
-{
-	return (Quaternion){a.r+b.r, a.i+b.i, a.j+b.j, a.k+b.k};
-}
-
-Quaternion
-subq(Quaternion a, Quaternion b)
-{
-	return (Quaternion){a.r-b.r, a.i-b.i, a.j-b.j, a.k-b.k};
-}
-
-Quaternion
-mulq(Quaternion q, Quaternion r)
-{
-	Point3 qv, rv, tmp;
-
-	qv = Vec3(q.i, q.j, q.k);
-	rv = Vec3(r.i, r.j, r.k);
-	tmp = addpt3(addpt3(mulpt3(rv, q.r), mulpt3(qv, r.r)), crossvec3(qv, rv));
-	return (Quaternion){q.r*r.r - dotvec3(qv, rv), tmp.x, tmp.y, tmp.z};
-}
-
-Quaternion
-smulq(Quaternion q, double s)
-{
-	return (Quaternion){q.r*s, q.i*s, q.j*s, q.k*s};
-}
-
-Quaternion
-sdivq(Quaternion q, double s)
-{
-	return (Quaternion){q.r/s, q.i/s, q.j/s, q.k/s};
-}
-
-double
-dotq(Quaternion q, Quaternion r)
-{
-	return q.r*r.r + q.i*r.i + q.j*r.j + q.k*r.k;
-}
-
-Quaternion
-invq(Quaternion q)
-{
-	double len²;
-
-	len² = dotq(q, q);
-	if(len² == 0)
-		return (Quaternion){0, 0, 0, 0};
-	return (Quaternion){q.r/len², -q.i/len², -q.j/len², -q.k/len²};
-}
-
-double
-qlen(Quaternion q)
-{
-	return sqrt(q.r*q.r + q.i*q.i + q.j*q.j + q.k*q.k);
-}
-
-Quaternion
-normq(Quaternion q)
-{
-	return sdivq(q, qlen(q));
-}
-
-Point3
-qrotate(Point3 p, Point3 axis, double angle)
-{
-	Quaternion qaxis, qr;
-
-	angle /= 2;
-	qaxis = Quatvec(cos(angle), mulpt3(axis, sin(angle)));
-	qr = mulq(mulq(qaxis, Quatvec(0, p)), invq(qaxis));
-	return Vec3(qr.i, qr.j, qr.k);
-}
diff --git a/libgeometry/rframe.c b/libgeometry/rframe.c
deleted file mode 100644
index 06d63f2..0000000
--- a/libgeometry/rframe.c
+++ /dev/null
@@ -1,51 +0,0 @@
-#include <u.h>
-#include <libc.h>
-#include "../geometry.h"
-
-Point2
-rframexform(Point2 p, RFrame rf)
-{
-	Matrix m = {
-		rf.bx.x, rf.bx.y, -dotvec2(rf.bx, rf.p),
-		rf.by.x, rf.by.y, -dotvec2(rf.by, rf.p),
-		0, 0, 1,
-	};
-	return xform(p, m);
-}
-
-Point3
-rframexform3(Point3 p, RFrame3 rf)
-{
-	Matrix3 m = {
-		rf.bx.x, rf.bx.y, rf.bx.z, -dotvec3(rf.bx, rf.p),
-		rf.by.x, rf.by.y, rf.by.z, -dotvec3(rf.by, rf.p),
-		rf.bz.x, rf.bz.y, rf.bz.z, -dotvec3(rf.bz, rf.p),
-		0, 0, 0, 1,
-	};
-	return xform3(p, m);
-}
-
-Point2
-invrframexform(Point2 p, RFrame rf)
-{
-	Matrix m = {
-		rf.bx.x, rf.bx.y, -dotvec2(rf.bx, rf.p),
-		rf.by.x, rf.by.y, -dotvec2(rf.by, rf.p),
-		0, 0, 1,
-	};
-	invm(m);
-	return xform(p, m);
-}
-
-Point3
-invrframexform3(Point3 p, RFrame3 rf)
-{
-	Matrix3 m = {
-		rf.bx.x, rf.bx.y, rf.bx.z, -dotvec3(rf.bx, rf.p),
-		rf.by.x, rf.by.y, rf.by.z, -dotvec3(rf.by, rf.p),
-		rf.bz.x, rf.bz.y, rf.bz.z, -dotvec3(rf.bz, rf.p),
-		0, 0, 0, 1,
-	};
-	invm3(m);
-	return xform3(p, m);
-}
diff --git a/libgeometry/triangle.c b/libgeometry/triangle.c
deleted file mode 100644
index a8bbf0f..0000000
--- a/libgeometry/triangle.c
+++ /dev/null
@@ -1,9 +0,0 @@
-#include <u.h>
-#include <libc.h>
-#include "../geometry.h"
-
-Point3
-centroid(Triangle3 t)
-{
-	return divpt3(addpt3(t.p0, addpt3(t.p1, t.p2)), 3);
-}
diff --git a/libgraphics/camera.c b/libgraphics/camera.c
deleted file mode 100644
index bb55490..0000000
--- a/libgraphics/camera.c
+++ /dev/null
@@ -1,104 +0,0 @@
-#include <u.h>
-#include <libc.h>
-#include <draw.h>
-#include <memdraw.h>
-#include "../geometry.h"
-#include "../graphics.h"
-
-static int
-max(int a, int b)
-{
-	return a > b ? a : b;
-}
-
-static void
-verifycfg(Camera *c)
-{
-	assert(c->viewport.fb != nil);
-	if(c->ptype == Ppersp)
-		assert(c->fov > 0 && c->fov < 360);
-	assert(c->clipn > 0 && c->clipn < c->clipf);
-}
-
-static void
-updatefb(Camera *c, Rectangle r, ulong chan)
-{
-	Memimage *fb;
-
-	fb = allocmemimage(r, chan);
-	if(fb == nil)
-		sysfatal("allocmemimage: %r");
-	c->viewport.fb = fb;
-	c->viewport.p = Pt2(r.min.x,r.max.y,1);
-}
-
-Camera*
-alloccamera(Rectangle r, ulong chan)
-{
-	Camera *c;
-
-	c = malloc(sizeof(Camera));
-	if(c == nil)
-		sysfatal("malloc: %r");
-	memset(c, 0, sizeof *c);
-	c->viewport.bx = Vec2(1,0);
-	c->viewport.by = Vec2(0,-1);
-	updatefb(c, r, chan);
-	c->updatefb = updatefb;
-}
-
-void
-configcamera(Camera *c, double fov, double n, double f, Projection p)
-{
-	c->fov = fov;
-	c->clipn = n;
-	c->clipf = f;
-	c->ptype = p;
-	reloadcamera(c);
-}
-
-void
-placecamera(Camera *c, Point3 p, Point3 focus, Point3 up)
-{
-	c->p = p;
-	if(focus.w == 0)
-		c->bz = focus;
-	else
-		c->bz = normvec3(subpt3(c->p, focus));
-	c->bx = normvec3(crossvec3(up, c->bz));
-	c->by = crossvec3(c->bz, c->bx);
-}
-
-void
-aimcamera(Camera *c, Point3 focus)
-{
-	placecamera(c, c->p, focus, c->by);
-}
-
-void
-reloadcamera(Camera *c)
-{
-	double a;
-	double l, r, b, t;
-
-	verifycfg(c);
-	switch(c->ptype){
-	case Portho:
-		/*
-		r = Dx(c->viewport.fb->r)/2;
-		t = Dy(c->viewport.fb->r)/2;
-		l = -r;
-		b = -t;
-		*/
-		l = t = 0;
-		r = Dx(c->viewport.fb->r);
-		b = Dy(c->viewport.fb->r);
-		orthographic(c->proj, l, r, b, t, c->clipn, c->clipf);
-		break;
-	case Ppersp:
-		a = (double)Dx(c->viewport.fb->r)/Dy(c->viewport.fb->r);
-		perspective(c->proj, c->fov, a, c->clipn, c->clipf);
-		break;
-	default: sysfatal("unknown projection type");
-	}
-}
diff --git a/libgraphics/doc/libgraphics.ms b/libgraphics/doc/libgraphics.ms
deleted file mode 100644
index 87a23a7..0000000
--- a/libgraphics/doc/libgraphics.ms
+++ /dev/null
@@ -1,34 +0,0 @@
-.TL
-libgraphics
-.AU
-Rodrigo G. López
-.sp
-rgl@antares-labs.eu
-.AI
-Antares Telecom Laboratories
-Albatera, Alicante
-.FS
-ACHTUNG! this is a
-.B "WORK IN PROGRESS"
-.FE
-.NH 1
-Data Structures
-.NH 2
-Camera
-.P1
-struct Camera {
-	RFrame3;		/* VCS */
-	Image *viewport;
-	double fov;		/* vertical FOV */
-	struct {
-		double n, f;	/* near and far clipping planes */
-	} clip;
-	Projection ptype;
-	Matrix3 proj;		/* VCS to viewport xform */
-};
-.P2
-.PP
-A camera is an image capturing entity, analog to the real world device
-we all know, that allows us to see the virtual 3-D world by projecting
-it into a viewport we can attach to a screen or window for real-time
-visualization or write out into a file.
diff --git a/libgraphics/doc/libgraphics.pdf b/libgraphics/doc/libgraphics.pdf
deleted file mode 100644
index 0291710..0000000
--- a/libgraphics/doc/libgraphics.pdf
+++ /dev/null
diff --git a/libgraphics/doc/libgraphics.ps b/libgraphics/doc/libgraphics.ps
deleted file mode 100644
index 1a566f7..0000000
--- a/libgraphics/doc/libgraphics.ps
+++ /dev/null
@@ -1,583 +0,0 @@
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-} bind def
-
-%%EndProlog
-%%BeginSetup
-mark
-%
-% Encoding vector and redefinition of findfont for the ISO Latin1 standard.
-% The 18 characters missing from ROM based fonts on older printers are noted
-% below.
-%
-
-/ISOLatin1Encoding [
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/space
-	/exclam
-	/quotedbl
-	/numbersign
-	/dollar
-	/percent
-	/ampersand
-	/quoteright
-	/parenleft
-	/parenright
-	/asterisk
-	/plus
-	/comma
-	/minus
-	/period
-	/slash
-	/zero
-	/one
-	/two
-	/three
-	/four
-	/five
-	/six
-	/seven
-	/eight
-	/nine
-	/colon
-	/semicolon
-	/less
-	/equal
-	/greater
-	/question
-	/at
-	/A
-	/B
-	/C
-	/D
-	/E
-	/F
-	/G
-	/H
-	/I
-	/J
-	/K
-	/L
-	/M
-	/N
-	/O
-	/P
-	/Q
-	/R
-	/S
-	/T
-	/U
-	/V
-	/W
-	/X
-	/Y
-	/Z
-	/bracketleft
-	/backslash
-	/bracketright
-	/asciicircum
-	/underscore
-	/quoteleft
-	/a
-	/b
-	/c
-	/d
-	/e
-	/f
-	/g
-	/h
-	/i
-	/j
-	/k
-	/l
-	/m
-	/n
-	/o
-	/p
-	/q
-	/r
-	/s
-	/t
-	/u
-	/v
-	/w
-	/x
-	/y
-	/z
-	/braceleft
-	/bar
-	/braceright
-	/asciitilde
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/.notdef
-	/dotlessi
-	/grave
-	/acute
-	/circumflex
-	/tilde
-	/macron
-	/breve
-	/dotaccent
-	/dieresis
-	/.notdef
-	/ring
-	/cedilla
-	/.notdef
-	/hungarumlaut
-	/ogonek
-	/caron
-	/space
-	/exclamdown
-	/cent
-	/sterling
-	/currency
-	/yen
-	/brokenbar		% missing
-	/section
-	/dieresis
-	/copyright
-	/ordfeminine
-	/guillemotleft
-	/logicalnot
-	/hyphen
-	/registered
-	/macron
-	/degree			% missing
-	/plusminus		% missing
-	/twosuperior		% missing
-	/threesuperior		% missing
-	/acute
-	/mu			% missing
-	/paragraph
-	/periodcentered
-	/cedilla
-	/onesuperior		% missing
-	/ordmasculine
-	/guillemotright
-	/onequarter		% missing
-	/onehalf		% missing
-	/threequarters		% missing
-	/questiondown
-	/Agrave
-	/Aacute
-	/Acircumflex
-	/Atilde
-	/Adieresis
-	/Aring
-	/AE
-	/Ccedilla
-	/Egrave
-	/Eacute
-	/Ecircumflex
-	/Edieresis
-	/Igrave
-	/Iacute
-	/Icircumflex
-	/Idieresis
-	/Eth			% missing
-	/Ntilde
-	/Ograve
-	/Oacute
-	/Ocircumflex
-	/Otilde
-	/Odieresis
-	/multiply		% missing
-	/Oslash
-	/Ugrave
-	/Uacute
-	/Ucircumflex
-	/Udieresis
-	/Yacute			% missing
-	/Thorn			% missing
-	/germandbls
-	/agrave
-	/aacute
-	/acircumflex
-	/atilde
-	/adieresis
-	/aring
-	/ae
-	/ccedilla
-	/egrave
-	/eacute
-	/ecircumflex
-	/edieresis
-	/igrave
-	/iacute
-	/icircumflex
-	/idieresis
-	/eth			% missing
-	/ntilde
-	/ograve
-	/oacute
-	/ocircumflex
-	/otilde
-	/odieresis
-	/divide			% missing
-	/oslash
-	/ugrave
-	/uacute
-	/ucircumflex
-	/udieresis
-	/yacute			% missing
-	/thorn			% missing
-	/ydieresis
-] def
-
-/NewFontDirectory FontDirectory maxlength dict def
-
-%
-% Apparently no guarantee findfont is defined in systemdict so the obvious
-%
-%	systemdict /findfont get exec
-%
-% can generate an error. So far the only exception is a VT600 (version 48.0).
-%
-
-userdict /@RealFindfont known not {
-	userdict begin
-		/@RealFindfont systemdict begin /findfont load end def
-	end
-} if
-
-/findfont {
-	dup NewFontDirectory exch known not {
-		dup
-		%dup systemdict /findfont get exec	% not always in systemdict
-		dup userdict /@RealFindfont get exec
-		dup /Encoding get StandardEncoding eq {
-			dup length dict begin
-				{1 index /FID ne {def}{pop pop} ifelse} forall
-				/Encoding ISOLatin1Encoding def
-				currentdict
-			end
-			/DummyFontName exch definefont
-		} if
-		NewFontDirectory 3 1 roll put
-	} if
-	NewFontDirectory exch get
-} bind def
-
-%%Patch from lp
-%%EndPatch from lp
-
-setup
-%%EndSetup
-%%Page: 1 1
-/saveobj save def
-mark
-1 pagesetup
-12 /LucidaSans-Demi f
-(libgraphics) 2533 1220 w
-10 /LucidaSans-Italic f
-(Rodrigo G. L\363pez) 2469 1480 w
-(rgl@antares-labs.eu) 2377 1760 w
-10 /LucidaSansUnicode00 f
-(Antares Telecom Laboratories) 2156 1960 w
-(Albatera, Alicante) 2451 2100 w
-10 /LucidaSans-Demi f
-(1.) 720 2700 w
-(Data Structures) 873 2700 w
-(1.1.) 720 2940 w
-(Camera) 962 2940 w
-9 /LucidaTypewriter f
-(struct) 920 3110 w
-(Camera) 1375 3110 w
-({) 1830 3110 w
-(};) 920 3330 w
-10 /LucidaSansUnicode00 f
-(A camera) 970 3546 w
-8 /S1 f
-(__________________) 720 6980 w
-8 /LucidaSansUnicode00 f
-(ACHTUNG!) 720 7080 w
-(this) 1163 7080 w
-(is) 1333 7080 w
-(a) 1423 7080 w
-8 /LucidaSans-Demi f
-(WORK) 1493 7080 w
-(IN) 1769 7080 w
-(PROGRESS) 1883 7080 w
-cleartomark
-showpage
-saveobj restore
-%%EndPage: 1 1
-%%Trailer
-done
-%%DocumentFonts: S1 LucidaSansUnicode00 LucidaSans-Demi LucidaSans-Italic LucidaTypewriter
-%%Pages: 1
diff --git a/libgraphics/doc/mkfile b/libgraphics/doc/mkfile
deleted file mode 100644
index 3bac031..0000000
--- a/libgraphics/doc/mkfile
+++ /dev/null
@@ -1,15 +0,0 @@
-FONTS='.FP lucidasans'
-DOCNAME=libgraphics
-
-all:VQ: $DOCNAME.ps $DOCNAME.pdf
-
-clean:VQ:
-	rm -f $DOCNAME.ps $DOCNAME.pdf
-
-$DOCNAME.ps:V: $DOCNAME.ms
-	{echo $FONTS; cat $prereq}> _$prereq
-	eval `{doctype _$prereq} | lp -dstdout > $target && rm -f _$prereq
-
-$DOCNAME.pdf:V: $DOCNAME.ps
-	cat /sys/doc/docfonts $prereq > _$prereq
-	ps2pdf _$prereq $target && rm -f _$prereq
diff --git a/libgraphics/mkfile b/libgraphics/mkfile
deleted file mode 100644
index b7669a3..0000000
--- a/libgraphics/mkfile
+++ /dev/null
@@ -1,11 +0,0 @@
-</$objtype/mkfile
-
-LIB=../libgraphics.a$O
-OFILES=\
-	triangle.$O\
-	camera.$O\
-	render.$O\
-
-HFILES=../graphics.h
-
-</sys/src/cmd/mklib
diff --git a/libgraphics/render.c b/libgraphics/render.c
deleted file mode 100644
index a1819ec..0000000
--- a/libgraphics/render.c
+++ /dev/null
@@ -1,98 +0,0 @@
-#include <u.h>
-#include <libc.h>
-#include <draw.h>
-#include "../geometry.h"
-#include "../graphics.h"
-
-/* requires p to be in NDC */
-int
-isclipping(Point3 p)
-{
-	if(p.x > p.w || p.x < -p.w ||
-	   p.y > p.w || p.y < -p.w ||
-	   p.z > p.w || p.z < 0)
-		return 1;
-	return 0;
-}
-
-static Point2
-flatten(Camera *c, Point3 p)
-{
-	Point2 p2;
-	Matrix S = {
-		Dx(c->viewport->r)/2, 0, 0,
-		0, Dy(c->viewport->r)/2, 0,
-		0, 0, 1,
-	}, T = {
-		1, 0, 1,
-		0, 1, 1,
-		0, 0, 1,
-	};
-
-	p2 = (Point2){p.x, p.y, p.w};
-	if(p2.w != 0)
-		p2 = divpt2(p2, p2.w);
-	mulm(S, T);
-	p2 = xform(p2, S);
-	return p2;
-}
-
-Point
-toviewport(Camera *c, Point3 p)
-{
-	Point2 p2;
-
-	p2 = invrframexform(flatten(c, p), c->viewport);
-	return (Point){p2.x, p2.y};
-}
-
-Point2
-fromviewport(Camera *c, Point p)
-{
-	return rframexform(Pt2(p.x,p.y,1), c->viewport);
-}
-
-void
-perspective(Matrix3 m, double fov, double a, double n, double f)
-{
-	double cotan;
-
-	cotan = 1/tan(fov/2*DEG);
-	identity3(m);
-	m[0][0] =  cotan/a;
-	m[1][1] =  cotan;
-	m[2][2] = -(f+n)/(f-n);
-	m[2][3] = -2*f*n/(f-n);
-	m[3][2] = -1;
-}
-
-void
-orthographic(Matrix3 m, double l, double r, double b, double t, double n, double f)
-{
-	identity3(m);
-	m[0][0] =  2/(r - l);
-	m[1][1] =  2/(t - b);
-	m[2][2] = -2/(f - n);
-	m[0][3] = -(r + l)/(r - l);
-	m[1][3] = -(t + b)/(t - b);
-	m[2][3] = -(f + n)/(f - n);
-}
-
-void
-line3(Camera *c, Point3 p0, Point3 p1, int end0, int end1, Image *src)
-{
-	p0 = WORLD2NDC(c, p0);
-	p1 = WORLD2NDC(c, p1);
-	if(isclipping(p0) || isclipping(p1))
-		return;
-	line(c->viewport, toviewport(c, p0), toviewport(c, p1), end0, end1, 0, src, ZP);
-}
-
-Point
-string3(Camera *c, Point3 p, Image *src, Font *f, char *s)
-{
-	p = WORLD2NDC(c, p);
-	if(isclipping(p))
-		return (Point){~0, ~0};
-	return string(c->viewport, toviewport(c, p), src, ZP, f, s);
-}
diff --git a/libobj/examples/box.obj b/libobj/examples/box.obj
deleted file mode 100644
index bd72661..0000000
--- a/libobj/examples/box.obj
+++ /dev/null
@@ -1,30 +0,0 @@
-#                       Vertices: 8
-#                         Points: 0
-#                          Lines: 0
-#                          Faces: 6
-#                      Materials: 1
-
-o 1
-
-# Vertex list
-
-v -0.5 -0.5 0.5
-v -0.5 -0.5 -0.5
-v -0.5 0.5 -0.5
-v -0.5 0.5 0.5
-v 0.5 -0.5 0.5
-v 0.5 -0.5 -0.5
-v 0.5 0.5 -0.5
-v 0.5 0.5 0.5
-
-# Point/Line/Face list
-
-usemtl Default
-f 4 3 2 1
-f 2 6 5 1
-f 3 7 6 2
-f 8 7 3 4
-f 5 8 4 1
-f 6 7 8 5
-
-# End of file
diff --git a/libobj/examples/cube.obj b/libobj/examples/cube.obj
deleted file mode 100644
index c569712..0000000
--- a/libobj/examples/cube.obj
+++ /dev/null
@@ -1,16 +0,0 @@
-# This is a cube that measures two units on each side.  Each vertex is
-# shared by three different faces.
-v 0.000000 2.000000 2.000000
-v 0.000000 0.000000 2.000000
-v 2.000000 0.000000 2.000000
-v 2.000000 2.000000 2.000000
-v 0.000000 2.000000 0.000000
-v 0.000000 0.000000 0.000000
-v 2.000000 0.000000 0.000000
-v 2.000000 2.000000 0.000000
-f 1 2 3 4
-f 8 7 6 5
-f 4 3 7 8
-f 5 1 4 8
-f 5 6 2 1
-f 2 6 7 3
diff --git a/libobj/examples/diamond.obj b/libobj/examples/diamond.obj
deleted file mode 100644
index 519f3ac..0000000
--- a/libobj/examples/diamond.obj
+++ /dev/null
@@ -1,20 +0,0 @@
-# diamond.obj
-
-g Object001
-
-v 0.000000E+00 0.000000E+00 78.0000
-v 45.0000 45.0000 0.000000E+00
-v 45.0000 -45.0000 0.000000E+00
-v -45.0000 -45.0000 0.000000E+00
-v -45.0000 45.0000 0.000000E+00
-v 0.000000E+00 0.000000E+00 -78.0000
-
-f     1 2 3
-f     1 3 4
-f     1 4 5
-f     1 5 2
-f     6 5 4
-f     6 4 3
-f     6 3 2
-f     6 2 1
-f     6 1 5
diff --git a/libobj/examples/lamp.obj b/libobj/examples/lamp.obj
deleted file mode 100644
index d8023e1..0000000
--- a/libobj/examples/lamp.obj
+++ /dev/null
@@ -1,8863 +0,0 @@
-#  Viewpoint Datalabs International, Inc.  Copyright 1996
-
-
-mtllib ./vp.mtl
-
-g
-v 0.000000 8.407028 0.000000
-v 0.000000 8.380042 -0.204985
-v 0.053054 8.380042 -0.198000
-v 0.102492 8.380042 -0.177522
-v 0.144946 8.380042 -0.144946
-v 0.177522 8.380042 -0.102492
-v 0.198000 8.380042 -0.053054
-v 0.204985 8.380042 0.000000
-v 0.198000 8.380042 0.053054
-v 0.177522 8.380042 0.102492
-v 0.144946 8.380042 0.144946
-v 0.102493 8.380042 0.177522
-v 0.053054 8.380042 0.198000
-v 0.000000 8.380042 0.204985
-v -0.053054 8.380042 0.198000
-v -0.102492 8.380042 0.177522
-v -0.144946 8.380042 0.144946
-v -0.177522 8.380042 0.102493
-v -0.198000 8.380042 0.053054
-v -0.204985 8.380042 0.000000
-v -0.198000 8.380042 -0.053054
-v -0.177522 8.380042 -0.102492
-v -0.144946 8.380042 -0.144946
-v -0.102493 8.380042 -0.177522
-v -0.053054 8.380042 -0.198000
-v 0.000000 8.300921 -0.396000
-v 0.102492 8.300921 -0.382507
-v 0.198000 8.300921 -0.342946
-v 0.280014 8.300921 -0.280014
-v 0.342946 8.300921 -0.198000
-v 0.382506 8.300921 -0.102493
-v 0.396000 8.300921 0.000000
-v 0.382507 8.300921 0.102492
-v 0.342946 8.300921 0.198000
-v 0.280015 8.300921 0.280014
-v 0.198000 8.300921 0.342946
-v 0.102493 8.300921 0.382506
-v 0.000000 8.300921 0.396000
-v -0.102492 8.300921 0.382507
-v -0.197999 8.300921 0.342946
-v -0.280014 8.300921 0.280015
-v -0.342946 8.300921 0.198000
-v -0.382506 8.300921 0.102493
-v -0.396000 8.300921 0.000000
-v -0.382507 8.300921 -0.102492
-v -0.342946 8.300921 -0.197999
-v -0.280015 8.300921 -0.280014
-v -0.198001 8.300921 -0.342946
-v -0.102493 8.300921 -0.382506
-v 0.000000 8.175057 -0.560028
-v 0.144946 8.175057 -0.540946
-v 0.280014 8.175057 -0.484999
-v 0.396000 8.175057 -0.396000
-v 0.484999 8.175057 -0.280015
-v 0.540946 8.175057 -0.144947
-v 0.560028 8.175057 0.000000
-v 0.540946 8.175057 0.144945
-v 0.484999 8.175057 0.280014
-v 0.396000 8.175057 0.395999
-v 0.280015 8.175057 0.484999
-v 0.144947 8.175057 0.540946
-v 0.000000 8.175057 0.560028
-v -0.144945 8.175057 0.540946
-v -0.280014 8.175057 0.484999
-v -0.395999 8.175057 0.396001
-v -0.484998 8.175057 0.280015
-v -0.540946 8.175057 0.144947
-v -0.560028 8.175057 0.000000
-v -0.540946 8.175057 -0.144945
-v -0.484999 8.175057 -0.280013
-v -0.396001 8.175057 -0.395999
-v -0.280015 8.175057 -0.484998
-v -0.144947 8.175057 -0.540946
-v 0.000000 8.011028 -0.685892
-v 0.177521 8.011028 -0.662521
-v 0.342946 8.011028 -0.594000
-v 0.484999 8.011028 -0.484999
-v 0.594000 8.011028 -0.342947
-v 0.662521 8.011028 -0.177523
-v 0.685892 8.011028 0.000000
-v 0.662521 8.011028 0.177521
-v 0.594000 8.011028 0.342945
-v 0.484999 8.011028 0.484998
-v 0.342947 8.011028 0.594000
-v 0.177523 8.011028 0.662521
-v 0.000000 8.011028 0.685892
-v -0.177521 8.011028 0.662521
-v -0.342945 8.011028 0.594000
-v -0.484998 8.011028 0.485000
-v -0.593999 8.011028 0.342947
-v -0.662521 8.011028 0.177523
-v -0.685892 8.011028 0.000001
-v -0.662521 8.011028 -0.177521
-v -0.594001 8.011028 -0.342945
-v -0.485000 8.011028 -0.484998
-v -0.342947 8.011028 -0.593999
-v -0.177523 8.011028 -0.662521
-v 0.000000 7.820013 -0.765013
-v 0.197999 7.820013 -0.738946
-v 0.382506 7.820013 -0.662521
-v 0.540946 7.820013 -0.540946
-v 0.662521 7.820013 -0.382507
-v 0.738946 7.820013 -0.198001
-v 0.765013 7.820013 0.000000
-v 0.738946 7.820013 0.197999
-v 0.662521 7.820013 0.382506
-v 0.540947 7.820013 0.540945
-v 0.382507 7.820013 0.662520
-v 0.198001 7.820013 0.738946
-v 0.000001 7.820013 0.765013
-v -0.197999 7.820013 0.738946
-v -0.382506 7.820013 0.662521
-v -0.540945 7.820013 0.540947
-v -0.662520 7.820013 0.382508
-v -0.738946 7.820013 0.198001
-v -0.765013 7.820013 0.000001
-v -0.738946 7.820013 -0.197999
-v -0.662522 7.820013 -0.382505
-v -0.540947 7.820013 -0.540945
-v -0.382508 7.820013 -0.662520
-v -0.198001 7.820013 -0.738946
-v 0.000000 7.615029 -0.792000
-v 0.204984 7.615029 -0.765013
-v 0.395999 7.615029 -0.685892
-v 0.560028 7.615029 -0.560029
-v 0.685892 7.615029 -0.396001
-v 0.765013 7.615029 -0.204985
-v 0.792000 7.615029 0.000000
-v 0.765013 7.615029 0.204984
-v 0.685893 7.615029 0.395999
-v 0.560029 7.615029 0.560028
-v 0.396001 7.615029 0.685892
-v 0.204986 7.615029 0.765013
-v 0.000001 7.615029 0.792000
-v -0.204984 7.615029 0.765014
-v -0.395999 7.615029 0.685893
-v -0.560028 7.615029 0.560029
-v -0.685892 7.615029 0.396001
-v -0.765013 7.615029 0.204986
-v -0.792000 7.615029 0.000001
-v -0.765014 7.615029 -0.204983
-v -0.685893 7.615029 -0.395999
-v -0.560030 7.615029 -0.560028
-v -0.396001 7.615029 -0.685891
-v -0.204986 7.615029 -0.765013
-v 0.000000 7.410044 -0.765013
-v 0.198000 7.410044 -0.738946
-v 0.382506 7.410044 -0.662521
-v 0.540946 7.410044 -0.540947
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-g post
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-f 4267 4283 4297 4298 4268
-f 3798 3827 4284 4271
-f 4274 4287 4288 4275
-f 4278 4291 4292 4279
-f 3827 3882 4301 4284
-f 4287 4304 4305 4288
-f 4382 4383 4292 4291
-f 4295 4312 4325 4326 4296
-f 4299 4329 4330 4313 4300
-f 4302 4315 4316 4303
-f 4306 4319 4320 4307
-f 4310 4323 4324 4311
-f 4315 4332 4333 4316
-f 4389 4336 4337 4388
-f 4385 4340 4341 4374
-f 4327 3988 3987 4328
-f 3982 2977 4000 4331
-f 4334 3997 3996 4335
-f 4338 3993 3992 4339
-f 4415 4414 4142 4141
-f 4411 4410 4146 4145
-f 4407 4406 4175 4174
-f 4356 4355 4130 4131
-f 4348 4347 4081 4080
-f 4359 4364 4068 4069
-f 4366 4350 4064 4065
-f 4368 4363 4022 4021
-f 4371 4372 4008 4009
-f 4388 4387 4321 4320
-f 4375 4384 4310 4311
-f 4381 4390 4306 4307
-f 4378 4377 4263 4262
-f 4398 4397 4232 4231
-f 4403 4402 4220 4221
-f 4084 4085 4416 4417
-f 4040 4052 4419
-f 4024 4012 4420
-f 4206 4194 4424
-f 4264 4265 4428 4429
-f 4281 4294 4431
-f 4325 4312 4432
-f 4146 4147 4436 4437
-f 4101 4116 4439
-# 4404 elements
diff --git a/libobj/examples/negcube.obj b/libobj/examples/negcube.obj
deleted file mode 100644
index 18109cd..0000000
--- a/libobj/examples/negcube.obj
+++ /dev/null
@@ -1,33 +0,0 @@
-# This is a cube with negative vertex reference numbers.  Each element
-# references the vertices stored immediately above it in the file.
-# Note that vertices are not shared.
-v 0.000000 2.000000 2.000000
-v 0.000000 0.000000 2.000000
-v 2.000000 0.000000 2.000000
-v 2.000000 2.000000 2.000000
-f -4 -3 -2 -1
-v 2.000000 2.000000 0.000000
-v 2.000000 0.000000 0.000000
-v 0.000000 0.000000 0.000000
-v 0.000000 2.000000 0.000000
-f -4 -3 -2 -1
-v 2.000000 2.000000 2.000000
-v 2.000000 0.000000 2.000000
-v 2.000000 0.000000 0.000000
-v 2.000000 2.000000 0.000000
-f -4 -3 -2 -1
-v 0.000000 2.000000 0.000000
-v 0.000000 2.000000 2.000000
-v 2.000000 2.000000 2.000000
-v 2.000000 2.000000 0.000000
-f -4 -3 -2 -1
-v 0.000000 2.000000 0.000000
-v 0.000000 0.000000 0.000000
-v 0.000000 0.000000 2.000000
-v 0.000000 2.000000 2.000000
-f -4 -3 -2 -1
-v 0.000000 0.000000 2.000000
-v 0.000000 0.000000 0.000000
-v 2.000000 0.000000 0.000000
-v 2.000000 0.000000 2.000000
-f -4 -3 -2 -1
diff --git a/libobj/examples/square.obj b/libobj/examples/square.obj
deleted file mode 100644
index d44fd6d..0000000
--- a/libobj/examples/square.obj
+++ /dev/null
@@ -1,9 +0,0 @@
-# This example shows a square that measures two units on each side and
-# faces in the positive direction (toward the camera).  Note that the
-# ordering of the vertices is counterclockwise.  This ordering
-# determines that the square is facing forward.
-v 0.000000 2.000000 0.000000
-v 0.000000 0.000000 0.000000
-v 2.000000 0.000000 0.000000
-v 2.000000 2.000000 0.000000
-f 1 2 3 4
diff --git a/libobj/mkfile b/libobj/mkfile
deleted file mode 100644
index f32264e..0000000
--- a/libobj/mkfile
+++ /dev/null
@@ -1,9 +0,0 @@
-</$objtype/mkfile
-
-LIB=../libobj.a$O
-OFILES=\
-	obj.$O\
-
-HFILES=../obj.h
-
-</sys/src/cmd/mklib
diff --git a/libobj/obj.2.man b/libobj/obj.2.man
deleted file mode 100644
index 9196385..0000000
--- a/libobj/obj.2.man
+++ /dev/null
@@ -1,88 +0,0 @@
-.TH OBJ 2
-.SH NAME
-objparse,
-objfree,
-OBJfmt,
-OBJfmtinstall
-\- OBJ parser
-.SH SYNOPSIS
-.ta 0.7i +0.7i +0.7i +0.7i +0.7i +0.7i +0.7i
-.EX
-#include <u.h>
-#include <libc.h>
-#include <obj.h>
-
-enum {
-	OBJVGeometric,
-	OBJVTexture,
-	OBJVNormal,
-	OBJVParametric,
-	OBJNVERT
-};
-
-enum {
-	OBJEPoint,
-	OBJELine,
-	OBJEFace,
-	OBJECurve,
-	OBJECurve2,
-	OBJESurface
-};
-
-enum {
-	OBJHTSIZE = 17
-};
-
-typedef struct
-{
-	union {
-		struct { double x, y, z, w; };	/* geometric */
-		struct { double u, v, vv; };	/* texture and parametric */
-		struct { double i, j, k; };	/* normal */
-	};
-} OBJVertex;
-
-typedef struct
-{
-	OBJVertex	*verts;
-	int		nvert;
-} OBJVertexArray;
-
-typedef struct
-{
-	int	*indices;
-	int	nindex;
-	int	type;
-	OBJElem	*next;
-} OBJElem;
-
-typedef struct
-{
-	char		*name;
-	OBJElem		*child;
-	OBJObject	*next;
-} OBJObject;
-
-typedef struct
-{
-	OBJVertexArray	vertdata[OBJNVERT];
-	OBJObject	*objtab[OBJHTSIZE];
-} OBJ;
-
-OBJ	*objparse(char *file);
-void	objfree(OBJ *obj);
-int	OBJfmt(Fmt*);
-void	OBJfmtinstall(void);
-.EE
-.SH DESCRIPTION
-An OBJ structure contains geometry and material information about a set of 3D objects
-.SH SOURCE
-.B /sys/src/libobj
-.SH SEE ALSO
-.IR geometry (2)
-.br
-http://paulbourke.net/dataformats/obj
-.br
-https://people.sc.fsu.edu/~jburkardt/data/obj/obj.html
-.SH DIAGNOSTICS
-.SH BUGS
diff --git a/libobj/obj.c b/libobj/obj.c
deleted file mode 100644
index 1575f70..0000000
--- a/libobj/obj.c
+++ /dev/null
@@ -1,584 +0,0 @@
-#include <u.h>
-#include <libc.h>
-#include <ctype.h>
-#include <bio.h>
-#include "../obj.h"
-
-#undef isspace(c)
-#define isspace(c) ((c) == ' ' || (c) == '\t')
-
-typedef struct Line Line;
-struct Line
-{
-	char *file;
-	ulong lineno;
-};
-
-static Line curline;
-
-static void
-error(char *fmt, ...)
-{
-	va_list va;
-	char buf[ERRMAX], *bp;
-
-	va_start(va, fmt);
-	bp = seprint(buf, buf + sizeof buf, "%s:%lud ", curline.file, curline.lineno);
-	vseprint(bp, buf + sizeof buf, fmt, va);
-	va_end(va);
-	werrstr("%s\n", buf);
-}
-
-static void *
-emalloc(ulong n)
-{
-	void *p;
-
-	p = malloc(n);
-	if(p == nil)
-		sysfatal("malloc: %r");
-	memset(p, 0, n);
-	setmalloctag(p, getcallerpc(&n));
-	return p;
-}
-
-static void *
-erealloc(void *v, ulong n)
-{
-	void *nv;
-
-	nv = realloc(v, n);
-	if(nv == nil)
-		sysfatal("realloc: %r");
-	setrealloctag(nv, getcallerpc(&v));
-	return nv;
-}
-
-static uint
-hash(char *s)
-{
-	uint h;
-
-	h = 0x811c9dc5;
-	while(*s != 0)
-		h = (h^(uchar)*s++) * 0x1000193;
-	return h % OBJHTSIZE;
-}
-
-static void
-addvertva(OBJVertexArray *va, OBJVertex v)
-{
-	va->verts = erealloc(va->verts, ++va->nvert*sizeof(OBJVertex));
-	va->verts[va->nvert-1] = v;
-}
-
-static void
-addvert(OBJ *obj, OBJVertex v, int vtype)
-{
-	addvertva(&obj->vertdata[vtype], v);
-}
-
-static void
-addelem(OBJObject *o, OBJElem *e)
-{
-	OBJElem *ep;
-
-	if(o->child == nil){
-		o->child = e;
-		return;
-	}
-	for(ep = o->child; ep->next != nil; ep = ep->next)
-		;
-	ep->next = e;
-}
-
-static OBJElem *
-allocelem(int t)
-{
-	OBJElem *e;
-
-	e = emalloc(sizeof(OBJElem));
-	e->type = t;
-	return e;
-}
-
-static void
-addelemidx(OBJElem *e, int idx)
-{
-	e->indices = erealloc(e->indices, ++e->nindex*sizeof(int));
-	e->indices[e->nindex-1] = idx;
-}
-
-static void
-freeelem(OBJElem *e)
-{
-	free(e->indices);
-	free(e);
-}
-
-static OBJObject *
-alloco(char *n)
-{
-	OBJObject *o;
-
-	o = emalloc(sizeof(OBJObject));
-	o->name = strdup(n);
-	return o;
-}
-
-static void
-freeo(OBJObject *o)
-{
-	OBJElem *e, *ne;
-
-	free(o->name);
-	for(e = o->child; e != nil; e = ne){
-		ne = e->next;
-		freeelem(e);
-	}
-	free(o);
-}
-
-static void
-pusho(OBJ *obj, OBJObject *o)
-{
-	OBJObject *op, *prev;
-	uint h;
-
-	prev = nil;
-	h = hash(o->name);
-	for(op = obj->objtab[h]; op != nil; prev = op, op = op->next)
-		if(strcmp(op->name, o->name) == 0){
-			o->next = op->next;
-			freeo(op);
-			break;
-		}
-	if(prev == nil){
-		obj->objtab[h] = o;
-		return;
-	}
-	prev->next = o;
-}
-
-static OBJObject *
-geto(OBJ *obj, char *n)
-{
-	OBJObject *o;
-	uint h;
-
-	h = hash(n);
-	for(o = obj->objtab[h]; o != nil; o = o->next)
-		if(strcmp(o->name, n) == 0)
-			break;
-	return o;
-}
-
-OBJ *
-objparse(char *file)
-{
-	Biobuf *bin;
-	OBJ *obj;
-	OBJObject *o;
-	OBJElem *e;
-	OBJVertex v;
-	double *d;
-	char c, buf[256], *p;
-	int vtype, idx, sign;
-
-	o = nil;
-	bin = Bopen(file, OREAD);
-	if(bin == nil)
-		sysfatal("Bopen: %r");
-	curline.file = file;
-	curline.lineno = 1;
-	obj = emalloc(sizeof(OBJ));
-	while((c = Bgetc(bin)) != Beof){
-		switch(c){
-		case 'v':
-			d = (double*)&v;
-			c = Bgetc(bin);
-			vtype = OBJVGeometric;
-			switch(c){
-			case 't': vtype = OBJVTexture; break;
-			case 'p': vtype = OBJVParametric; break;
-			case 'n': vtype = OBJVNormal; break;
-			default:
-				if(!isspace(c)){
-					error("wrong vertex type");
-					goto error;
-				}
-			}
-			while(c = Bgetc(bin), c != Beof && c != '\n' && d-(double*)&v < 4){
-				while(isspace(c))
-					c = Bgetc(bin);
-				if(c == '\\'){
-					while(c != '\n')
-						c = Bgetc(bin);
-					continue;
-				}
-				if(c != '-' && !isdigit(c)){
-					error("unexpected character '%c'", c);
-					goto error;
-				}
-				Bungetc(bin);
-				Bgetd(bin, d++);
-			}
-			switch(vtype){
-			case OBJVGeometric:
-				if(d-(double*)&v < 3){
-					error("not enough coordinates");
-					goto error;
-				}
-				if(d-(double*)&v < 4)
-					*d = 1;	/* default w value */
-				break;
-			case OBJVTexture:
-				if(d-(double*)&v < 1){
-					error("not enough coordinates");
-					goto error;
-				}
-				while(d-(double*)&v < 3)
-					*d++ = 0;	/* default v and w values */
-				break;
-			case OBJVParametric:
-				if(d-(double*)&v < 2){
-					error("not enough coordinates");
-					goto error;
-				}
-				if(d-(double*)&v < 3)
-					*d = 1;	/* default w value */
-				break;
-			case OBJVNormal:
-				if(d-(double*)&v < 3){
-					error("not enough coordinates");
-					goto error;
-				}
-			}
-			addvert(obj, v, vtype);
-			break;
-		case 'o':
-			p = buf;
-			c = Bgetc(bin);
-			if(!isspace(c)){
-				error("syntax error");
-				goto error;
-			}
-			while(isspace(c))
-				c = Bgetc(bin);
-			if(!isalnum(c)){
-				error("unexpected character '%c'", c);
-				goto error;
-			}
-			do{
-				*p++ = c;
-			}while(c = Bgetc(bin), isalnum(c) && p-buf < sizeof(buf)-1);
-			*p = 0;
-			o = geto(obj, buf);
-			if(o == nil){
-				o = alloco(buf);
-				pusho(obj, o);
-			}
-			break;
-		case 'g':
-		case 's':
-			/* element and smoothing groups ignored for now */
-			while(c != '\n')
-				c = Bgetc(bin);
-			break;
-		case 'p':
-			c = Bgetc(bin);
-			if(!isspace(c)){
-				error("syntax error");
-				goto error;
-			}
-			while(c = Bgetc(bin), c != '\n'){
-				idx = 0;
-				sign = 0;
-				while(isspace(c))
-					c = Bgetc(bin);
-				if(c == '\\'){
-					while(c != '\n')
-						c = Bgetc(bin);
-					continue;
-				}
-				if(c != '-' && !isdigit(c)){
-					error("unexpected character '%c'", c);
-					goto error;
-				}
-				if(c == '-'){
-					sign = 1;
-					c = Bgetc(bin);
-					if(!isdigit(c)){
-						error("unexpected character '%c'", c);
-						goto error;
-					}
-				}
-				do{
-					idx = idx*10 + c-'0';
-				}while(c = Bgetc(bin), isdigit(c));
-				Bungetc(bin);
-				idx = sign ? obj->vertdata[OBJVGeometric].nvert-idx : idx-1;
-				if(idx+1 > obj->vertdata[OBJVGeometric].nvert){
-					error("not enough vertices");
-					goto error;
-				}
-				e = allocelem(OBJEPoint);
-				addelemidx(e, idx);
-				if(o == nil){
-					o = alloco("default");
-					pusho(obj, o);
-				}
-				addelem(o, e);
-			}
-			break;
-		case 'l':
-			c = Bgetc(bin);
-			if(!isspace(c)){
-				error("syntax error");
-				goto error;
-			}
-			while(c = Bgetc(bin), c != '\n'){
-				idx = 0;
-				sign = 0;
-				while(isspace(c))
-					c = Bgetc(bin);
-				if(c == '\\'){
-					while(c != '\n')
-						c = Bgetc(bin);
-					continue;
-				}
-				if(c != '-' && !isdigit(c)){
-					error("unexpected character '%c'", c);
-					goto error;
-				}
-				if(c == '-'){
-					sign = 1;
-					c = Bgetc(bin);
-					if(!isdigit(c)){
-						error("unexpected character '%c'", c);
-						goto error;
-					}
-				}
-				do{
-					idx = idx*10 + c-'0';
-				}while(c = Bgetc(bin), isdigit(c));
-				idx = sign ? obj->vertdata[OBJVGeometric].nvert-idx : idx-1;
-				if(idx+1 > obj->vertdata[OBJVGeometric].nvert){
-					error("not enough vertices");
-					goto error;
-				}
-				e = allocelem(OBJELine);
-				addelemidx(e, idx);
-Line2:
-				idx = 0;
-				sign = 0;
-				while(isspace(c))
-					c = Bgetc(bin);
-				if(c == '\\'){
-					while(c != '\n')
-						c = Bgetc(bin);
-					c = Bgetc(bin);
-					goto Line2;
-				}
-				if(c != '-' && !isdigit(c)){
-					freeelem(e);
-					error("unexpected character '%c'", c);
-					goto error;
-				}
-				if(c == '-'){
-					sign = 1;
-					c = Bgetc(bin);
-					if(!isdigit(c)){
-						freeelem(e);
-						error("unexpected character '%c'", c);
-						goto error;
-					}
-				}
-				do{
-					idx = idx*10 + c-'0';
-				}while(c = Bgetc(bin), isdigit(c));
-				Bungetc(bin);
-				idx = sign ? obj->vertdata[OBJVGeometric].nvert-idx : idx-1;
-				if(idx+1 > obj->vertdata[OBJVGeometric].nvert){
-					freeelem(e);
-					error("not enough vertices");
-					goto error;
-				}
-				addelemidx(e, idx);
-				if(o == nil){
-					o = alloco("default");
-					pusho(obj, o);
-				}
-				addelem(o, e);
-			}
-			break;
-		case 'f':
-			e = allocelem(OBJEFace);
-			c = Bgetc(bin);
-			if(!isspace(c)){
-				freeelem(e);
-				error("syntax error");
-				goto error;
-			}
-			while(c = Bgetc(bin), c != '\n'){
-				idx = 0;
-				sign = 0;
-				while(isspace(c))
-					c = Bgetc(bin);
-				if(c == '\\'){
-					while(c != '\n')
-						c = Bgetc(bin);
-					continue;
-				}
-				if(c != '-' && !isdigit(c)){
-					freeelem(e);
-					error("unexpected character '%c'", c);
-					goto error;
-				}
-				if(c == '-'){
-					sign = 1;
-					c = Bgetc(bin);
-					if(!isdigit(c)){
-						freeelem(e);
-						error("unexpected character '%c'", c);
-						goto error;
-					}
-				}
-				do{
-					idx = idx*10 + c-'0';
-				}while(c = Bgetc(bin), isdigit(c));
-				Bungetc(bin);
-				idx = sign ? obj->vertdata[OBJVGeometric].nvert-idx : idx-1;
-				if(idx+1 > obj->vertdata[OBJVGeometric].nvert){
-					freeelem(e);
-					error("not enough vertices");
-					goto error;
-				}
-				addelemidx(e, idx);
-			}
-			if(o == nil){
-				o = alloco("default");
-				pusho(obj, o);
-			}
-			addelem(o, e);
-			break;
-		case 'm':
-		case 'u':
-			p = buf;
-			do{
-				*p++ = c;
-			}while(c = Bgetc(bin), isalpha(c) && p-buf < sizeof(buf)-1);
-			*p = 0;
-			if(strcmp(buf, "mtllib") != 0 && strcmp(buf, "usemtl") != 0){
-				error("syntax error");
-				goto error;
-			}
-			while(c != '\n')
-				c = Bgetc(bin);
-			break;
-		case '#':
-			while(c != '\n')
-				c = Bgetc(bin);
-			break;
-		}
-		do{
-			if(c == '\n'){
-				curline.lineno++;
-				break;
-			}
-			if(!isspace(c)){
-				error("syntax error");
-				goto error;
-			}
-		}while((c = Bgetc(bin)) != Beof);
-	}
-	Bterm(bin);
-	return obj;
-error:
-	objfree(obj);
-	Bterm(bin);
-	return nil;
-}
-
-void
-objfree(OBJ *obj)
-{
-	OBJObject *o, *no;
-	int i;
-
-	if(obj == nil)
-		return;
-	for(i = 0; i < nelem(obj->vertdata); i++)
-		free(obj->vertdata[i].verts);
-	for(i = 0; i < nelem(obj->objtab); i++)
-		for(o = obj->objtab[i]; o != nil; o = no){
-			no = o->next;
-			freeo(o);
-		}
-	free(obj);
-}
-
-int
-OBJfmt(Fmt *f)
-{
-	OBJ *obj;
-	OBJObject *o;
-	OBJElem *e;
-	OBJVertex v;
-	int i, j, r, pack;
-
-	r = pack = 0;
-	obj = va_arg(f->args, OBJ*);
-	for(i = 0; i < nelem(obj->vertdata); i++)
-		for(j = 0; j < obj->vertdata[i].nvert; j++){
-			v = obj->vertdata[i].verts[j];
-			switch(i){
-			case OBJVGeometric:
-				r += fmtprint(f, "v %g %g %g %g\n", v.x, v.y, v.z, v.w);
-				break;
-			case OBJVTexture:
-				r += fmtprint(f, "vt %g %g %g\n", v.u, v.v, v.vv);
-				break;
-			case OBJVNormal:
-				r += fmtprint(f, "vn %g %g %g\n", v.i, v.j, v.k);
-				break;
-			case OBJVParametric:
-				r += fmtprint(f, "vp %g %g %g\n", v.u, v.v, v.vv);
-				break;
-			}
-		}
-	for(i = 0; i < nelem(obj->objtab); i++)
-		for(o = obj->objtab[i]; o != nil; o = o->next){
-			if(strcmp(o->name, "default") != 0)
-				r += fmtprint(f, "o %s\n", o->name);
-			for(e = o->child; e != nil; e = e->next){
-				switch(e->type){
-				case OBJEPoint:
-					if(pack == 0)
-						r += fmtprint(f, "p");
-					pack = pack > 0 ? --pack : 8-1;
-					break;
-				case OBJELine:
-					r += fmtprint(f, "l");
-					break;
-				case OBJEFace:
-					r += fmtprint(f, "f");
-					break;
-				//case OBJECurve:
-				//case OBJECurve2:
-				//case OBJESurface:
-				}
-				for(j = 0; j < e->nindex; j++)
-					r += fmtprint(f, " %d", e->indices[j]+1);
-				if(e->type != OBJEPoint || pack == 0)
-					r += fmtprint(f, "\n");
-			}
-		}
-	return r;
-}
-
-void
-OBJfmtinstall(void)
-{
-	fmtinstall('O', OBJfmt);
-}
diff --git a/libobj/spec b/libobj/spec
deleted file mode 100644
index a535f4b..0000000
--- a/libobj/spec
+++ /dev/null
@@ -1,2 +0,0 @@
-http://paulbourke.net/dataformats/obj
-https://people.sc.fsu.edu/~jburkardt/data/obj/obj.html
diff --git a/libobj/test/main.acid b/libobj/test/main.acid
deleted file mode 100644
index 25a8f30..0000000
--- a/libobj/test/main.acid
+++ /dev/null
@@ -1,525 +0,0 @@
-sizeof_1_ = 8;
-aggr _1_
-{
-	'U' 0 lo;
-	'U' 4 hi;
-};
-
-defn
-_1_(addr) {
-	complex _1_ addr;
-	print("	lo	", addr.lo, "\n");
-	print("	hi	", addr.hi, "\n");
-};
-
-sizeofFPdbleword = 8;
-aggr FPdbleword
-{
-	'F' 0 x;
-	{
-	'U' 0 lo;
-	'U' 4 hi;
-	};
-};
-
-defn
-FPdbleword(addr) {
-	complex FPdbleword addr;
-	print("	x	", addr.x, "\n");
-	print("_1_ {\n");
-		_1_(addr+0);
-	print("}\n");
-};
-
-UTFmax = 4;
-Runesync = 128;
-Runeself = 128;
-Runeerror = 65533;
-Runemax = 1114111;
-Runemask = 2097151;
-sizeofFmt = 80;
-aggr Fmt
-{
-	'b' 0 runes;
-	'Y' 8 start;
-	'Y' 16 to;
-	'Y' 24 stop;
-	'Y' 32 flush;
-	'Y' 40 farg;
-	'D' 48 nfmt;
-	'Y' 56 args;
-	'D' 64 r;
-	'D' 68 width;
-	'D' 72 prec;
-	'U' 76 flags;
-};
-
-defn
-Fmt(addr) {
-	complex Fmt addr;
-	print("	runes	", addr.runes, "\n");
-	print("	start	", addr.start\Y, "\n");
-	print("	to	", addr.to\Y, "\n");
-	print("	stop	", addr.stop\Y, "\n");
-	print("	flush	", addr.flush\Y, "\n");
-	print("	farg	", addr.farg\Y, "\n");
-	print("	nfmt	", addr.nfmt, "\n");
-	print("	args	", addr.args\Y, "\n");
-	print("	r	", addr.r, "\n");
-	print("	width	", addr.width, "\n");
-	print("	prec	", addr.prec, "\n");
-	print("	flags	", addr.flags, "\n");
-};
-
-FmtWidth = 1;
-FmtLeft = 2;
-FmtPrec = 4;
-FmtSharp = 8;
-FmtSpace = 16;
-FmtSign = 32;
-FmtZero = 64;
-FmtUnsigned = 128;
-FmtShort = 256;
-FmtLong = 512;
-FmtVLong = 1024;
-FmtComma = 2048;
-FmtByte = 4096;
-FmtFlag = 8192;
-sizeofTm = 40;
-aggr Tm
-{
-	'D' 0 sec;
-	'D' 4 min;
-	'D' 8 hour;
-	'D' 12 mday;
-	'D' 16 mon;
-	'D' 20 year;
-	'D' 24 wday;
-	'D' 28 yday;
-	'a' 32 zone;
-	'D' 36 tzoff;
-};
-
-defn
-Tm(addr) {
-	complex Tm addr;
-	print("	sec	", addr.sec, "\n");
-	print("	min	", addr.min, "\n");
-	print("	hour	", addr.hour, "\n");
-	print("	mday	", addr.mday, "\n");
-	print("	mon	", addr.mon, "\n");
-	print("	year	", addr.year, "\n");
-	print("	wday	", addr.wday, "\n");
-	print("	yday	", addr.yday, "\n");
-	print("	zone	", addr.zone, "\n");
-	print("	tzoff	", addr.tzoff, "\n");
-};
-
-PNPROC = 1;
-PNGROUP = 2;
-Profoff = 0;
-Profuser = 1;
-Profkernel = 2;
-Proftime = 3;
-Profsample = 4;
-sizeofLock = 8;
-aggr Lock
-{
-	'D' 0 val;
-};
-
-defn
-Lock(addr) {
-	complex Lock addr;
-	print("	val	", addr.val, "\n");
-};
-
-sizeofQLp = 16;
-aggr QLp
-{
-	'D' 0 inuse;
-	'D' 4 state;
-	'A' QLp 8 next;
-};
-
-defn
-QLp(addr) {
-	complex QLp addr;
-	print("	inuse	", addr.inuse, "\n");
-	print("	state	", addr.state, "\n");
-	print("	next	", addr.next\Y, "\n");
-};
-
-sizeofQLock = 32;
-aggr QLock
-{
-	Lock 0 lock;
-	'D' 8 locked;
-	'A' QLp 16 $head;
-	'A' QLp 24 $tail;
-};
-
-defn
-QLock(addr) {
-	complex QLock addr;
-	print("Lock lock {\n");
-	Lock(addr.lock);
-	print("}\n");
-	print("	locked	", addr.locked, "\n");
-	print("	$head	", addr.$head\Y, "\n");
-	print("	$tail	", addr.$tail\Y, "\n");
-};
-
-sizeofRWLock = 32;
-aggr RWLock
-{
-	Lock 0 lock;
-	'D' 8 readers;
-	'D' 12 writer;
-	'A' QLp 16 $head;
-	'A' QLp 24 $tail;
-};
-
-defn
-RWLock(addr) {
-	complex RWLock addr;
-	print("Lock lock {\n");
-	Lock(addr.lock);
-	print("}\n");
-	print("	readers	", addr.readers, "\n");
-	print("	writer	", addr.writer, "\n");
-	print("	$head	", addr.$head\Y, "\n");
-	print("	$tail	", addr.$tail\Y, "\n");
-};
-
-sizeofRendez = 24;
-aggr Rendez
-{
-	'A' QLock 0 l;
-	'A' QLp 8 $head;
-	'A' QLp 16 $tail;
-};
-
-defn
-Rendez(addr) {
-	complex Rendez addr;
-	print("	l	", addr.l\Y, "\n");
-	print("	$head	", addr.$head\Y, "\n");
-	print("	$tail	", addr.$tail\Y, "\n");
-};
-
-sizeofNetConnInfo = 72;
-aggr NetConnInfo
-{
-	'Y' 0 dir;
-	'Y' 8 root;
-	'Y' 16 spec;
-	'Y' 24 lsys;
-	'Y' 32 lserv;
-	'Y' 40 rsys;
-	'Y' 48 rserv;
-	'Y' 56 laddr;
-	'Y' 64 raddr;
-};
-
-defn
-NetConnInfo(addr) {
-	complex NetConnInfo addr;
-	print("	dir	", addr.dir\Y, "\n");
-	print("	root	", addr.root\Y, "\n");
-	print("	spec	", addr.spec\Y, "\n");
-	print("	lsys	", addr.lsys\Y, "\n");
-	print("	lserv	", addr.lserv\Y, "\n");
-	print("	rsys	", addr.rsys\Y, "\n");
-	print("	rserv	", addr.rserv\Y, "\n");
-	print("	laddr	", addr.laddr\Y, "\n");
-	print("	raddr	", addr.raddr\Y, "\n");
-};
-
-RFNAMEG = 1;
-RFENVG = 2;
-RFFDG = 4;
-RFNOTEG = 8;
-RFPROC = 16;
-RFMEM = 32;
-RFNOWAIT = 64;
-RFCNAMEG = 1024;
-RFCENVG = 2048;
-RFCFDG = 4096;
-RFREND = 8192;
-RFNOMNT = 16384;
-sizeofQid = 16;
-aggr Qid
-{
-	'W' 0 path;
-	'U' 8 vers;
-	'b' 12 type;
-};
-
-defn
-Qid(addr) {
-	complex Qid addr;
-	print("	path	", addr.path, "\n");
-	print("	vers	", addr.vers, "\n");
-	print("	type	", addr.type, "\n");
-};
-
-sizeofDir = 80;
-aggr Dir
-{
-	'u' 0 type;
-	'U' 4 dev;
-	Qid 8 qid;
-	'U' 24 mode;
-	'U' 28 atime;
-	'U' 32 mtime;
-	'V' 40 length;
-	'Y' 48 name;
-	'Y' 56 uid;
-	'Y' 64 gid;
-	'Y' 72 muid;
-};
-
-defn
-Dir(addr) {
-	complex Dir addr;
-	print("	type	", addr.type, "\n");
-	print("	dev	", addr.dev, "\n");
-	print("Qid qid {\n");
-	Qid(addr.qid);
-	print("}\n");
-	print("	mode	", addr.mode, "\n");
-	print("	atime	", addr.atime, "\n");
-	print("	mtime	", addr.mtime, "\n");
-	print("	length	", addr.length, "\n");
-	print("	name	", addr.name\Y, "\n");
-	print("	uid	", addr.uid\Y, "\n");
-	print("	gid	", addr.gid\Y, "\n");
-	print("	muid	", addr.muid\Y, "\n");
-};
-
-sizeofWaitmsg = 24;
-aggr Waitmsg
-{
-	'D' 0 pid;
-	'a' 4 time;
-	'Y' 16 msg;
-};
-
-defn
-Waitmsg(addr) {
-	complex Waitmsg addr;
-	print("	pid	", addr.pid, "\n");
-	print("	time	", addr.time, "\n");
-	print("	msg	", addr.msg\Y, "\n");
-};
-
-sizeofIOchunk = 16;
-aggr IOchunk
-{
-	'Y' 0 addr;
-	'U' 8 len;
-};
-
-defn
-IOchunk(addr) {
-	complex IOchunk addr;
-	print("	addr	", addr.addr\Y, "\n");
-	print("	len	", addr.len, "\n");
-};
-
-OBJVGeometric = 0;
-OBJVTexture = 1;
-OBJVNormal = 2;
-OBJVParametric = 3;
-OBJNVERT = 4;
-OBJEPoint = 0;
-OBJELine = 1;
-OBJEFace = 2;
-OBJECurve = 3;
-OBJECurve2 = 4;
-OBJESurface = 5;
-OBJGGlobal = 0;
-OBJGSmoothing = 1;
-OBJGMerging = 2;
-OBJGObject = 3;
-OBJHTSIZE = 16;
-sizeof_2_ = 32;
-aggr _2_
-{
-	'F' 0 x;
-	'F' 8 y;
-	'F' 16 z;
-	'F' 24 w;
-};
-
-defn
-_2_(addr) {
-	complex _2_ addr;
-	print("	x	", addr.x, "\n");
-	print("	y	", addr.y, "\n");
-	print("	z	", addr.z, "\n");
-	print("	w	", addr.w, "\n");
-};
-
-sizeof_3_ = 24;
-aggr _3_
-{
-	'F' 0 u;
-	'F' 8 v;
-	'F' 16 vv;
-};
-
-defn
-_3_(addr) {
-	complex _3_ addr;
-	print("	u	", addr.u, "\n");
-	print("	v	", addr.v, "\n");
-	print("	vv	", addr.vv, "\n");
-};
-
-sizeof_4_ = 24;
-aggr _4_
-{
-	'F' 0 i;
-	'F' 8 j;
-	'F' 16 k;
-};
-
-defn
-_4_(addr) {
-	complex _4_ addr;
-	print("	i	", addr.i, "\n");
-	print("	j	", addr.j, "\n");
-	print("	k	", addr.k, "\n");
-};
-
-sizeof_5_ = 32;
-aggr _5_
-{
-	{
-	'F' 0 x;
-	'F' 8 y;
-	'F' 16 z;
-	'F' 24 w;
-	};
-	{
-	'F' 0 u;
-	'F' 8 v;
-	'F' 16 vv;
-	};
-	{
-	'F' 0 i;
-	'F' 8 j;
-	'F' 16 k;
-	};
-};
-
-defn
-_5_(addr) {
-	complex _5_ addr;
-	print("_2_ {\n");
-		_2_(addr+0);
-	print("}\n");
-	print("_3_ {\n");
-		_3_(addr+0);
-	print("}\n");
-	print("_4_ {\n");
-		_4_(addr+0);
-	print("}\n");
-};
-
-sizeofOBJVertex = 32;
-aggr OBJVertex
-{
-	{
-	{
-	'F' 0 x;
-	'F' 8 y;
-	'F' 16 z;
-	'F' 24 w;
-	};
-	{
-	'F' 0 u;
-	'F' 8 v;
-	'F' 16 vv;
-	};
-	{
-	'F' 0 i;
-	'F' 8 j;
-	'F' 16 k;
-	};
-	};
-};
-
-defn
-OBJVertex(addr) {
-	complex OBJVertex addr;
-	print("_5_ {\n");
-		_5_(addr+0);
-	print("}\n");
-};
-
-sizeofOBJVertexArray = 16;
-aggr OBJVertexArray
-{
-	'A' OBJVertex 0 verts;
-	'D' 8 nvert;
-};
-
-defn
-OBJVertexArray(addr) {
-	complex OBJVertexArray addr;
-	print("	verts	", addr.verts\Y, "\n");
-	print("	nvert	", addr.nvert, "\n");
-};
-
-sizeofOBJElem = 24;
-aggr OBJElem
-{
-	'Y' 0 indices;
-	'D' 8 nindex;
-	'D' 12 type;
-	'A' OBJElem 16 next;
-};
-
-defn
-OBJElem(addr) {
-	complex OBJElem addr;
-	print("	indices	", addr.indices\Y, "\n");
-	print("	nindex	", addr.nindex, "\n");
-	print("	type	", addr.type, "\n");
-	print("	next	", addr.next\Y, "\n");
-};
-
-sizeofOBJObject = 24;
-aggr OBJObject
-{
-	'Y' 0 name;
-	'A' OBJElem 8 child;
-	'A' OBJObject 16 next;
-};
-
-defn
-OBJObject(addr) {
-	complex OBJObject addr;
-	print("	name	", addr.name\Y, "\n");
-	print("	child	", addr.child\Y, "\n");
-	print("	next	", addr.next\Y, "\n");
-};
-
-sizeofOBJ = 192;
-aggr OBJ
-{
-	'a' 0 vertdata;
-	'a' 64 objtab;
-};
-
-defn
-OBJ(addr) {
-	complex OBJ addr;
-	print("	vertdata	", addr.vertdata, "\n");
-	print("	objtab	", addr.objtab, "\n");
-};
-
-complex OBJ main:obj;
diff --git a/libobj/test/main.c b/libobj/test/main.c
deleted file mode 100644
index 1a60b42..0000000
--- a/libobj/test/main.c
+++ /dev/null
@@ -1,35 +0,0 @@
-#include <u.h>
-#include <libc.h>
-#include "../../obj.h"
-
-static char fd0[] = "/fd/0";
-
-void
-usage(void)
-{
-	fprint(2, "usage: %s [file]\n", argv0);
-	exits("usage");
-}
-
-void
-main(int argc, char *argv[])
-{
-	OBJ *obj;
-	char *f;
-
-	f = fd0;
-	OBJfmtinstall();
-	ARGBEGIN{
-	default: usage();
-	}ARGEND;
-	if(argc > 1)
-		usage();
-	if(argc == 1)
-		f = argv[0];
-	obj = objparse(f);
-	if(obj == nil)
-		sysfatal("objparse: %r");
-	print("%O\n", obj);
-	objfree(obj);
-	exits(0);
-}
diff --git a/libobj/test/mkfile b/libobj/test/mkfile
deleted file mode 100644
index 2f4895c..0000000
--- a/libobj/test/mkfile
+++ /dev/null
@@ -1,21 +0,0 @@
-</$objtype/mkfile
-
-BIN=$home/$objtype/bin
-TARG=objtest
-OFILES=\
-	main.$O\
-
-HFILES=../../obj.h
-
-LIB=\
-	../../libobj.a$O\
-
-</sys/src/cmd/mkone
-
-../../libobj.a$O:
-	cd ..
-	mk install
-
-clean nuke:V:
-	rm -f *.[$OS] [$OS].out y.tab.? y.debug y.output $TARG
-	@{cd ..; mk $target}
diff --git a/main.acid b/main.acid
index 67e14e0..1a55a8a 100644
--- a/main.acid
+++ b/main.acid
@@ -788,6 +788,162 @@ complex Display display;
 complex Font font;
 complex Image screen;
 complex Screen _screen;
+sizeofMemdata = 40;
+aggr Memdata
+{
+	'Y' 0 base;
+	'Y' 8 bdata;
+	'D' 16 ref;
+	'Y' 24 imref;
+	'D' 32 allocd;
+};
+
+defn
+Memdata(addr) {
+	complex Memdata addr;
+	print("	base	", addr.base\Y, "\n");
+	print("	bdata	", addr.bdata\Y, "\n");
+	print("	ref	", addr.ref, "\n");
+	print("	imref	", addr.imref\Y, "\n");
+	print("	allocd	", addr.allocd, "\n");
+};
+
+Frepl = 1;
+Fsimple = 2;
+Fgrey = 4;
+Falpha = 8;
+Fcmap = 16;
+Fbytes = 32;
+sizeofMemimage = 168;
+aggr Memimage
+{
+	Rectangle 0 r;
+	Rectangle 16 clipr;
+	'D' 32 depth;
+	'D' 36 nchan;
+	'U' 40 chan;
+	'Y' 48 cmap;
+	'A' Memdata 56 data;
+	'D' 64 zero;
+	'U' 68 width;
+	'Y' 72 layer;
+	'U' 80 flags;
+	'a' 84 shift;
+	'a' 112 mask;
+	'a' 140 nbits;
+};
+
+defn
+Memimage(addr) {
+	complex Memimage addr;
+	print("Rectangle r {\n");
+	Rectangle(addr.r);
+	print("}\n");
+	print("Rectangle clipr {\n");
+	Rectangle(addr.clipr);
+	print("}\n");
+	print("	depth	", addr.depth, "\n");
+	print("	nchan	", addr.nchan, "\n");
+	print("	chan	", addr.chan, "\n");
+	print("	cmap	", addr.cmap\Y, "\n");
+	print("	data	", addr.data\Y, "\n");
+	print("	zero	", addr.zero, "\n");
+	print("	width	", addr.width, "\n");
+	print("	layer	", addr.layer\Y, "\n");
+	print("	flags	", addr.flags, "\n");
+	print("	shift	", addr.shift, "\n");
+	print("	mask	", addr.mask, "\n");
+	print("	nbits	", addr.nbits, "\n");
+};
+
+sizeofMemcmap = 4864;
+aggr Memcmap
+{
+	'a' 0 cmap2rgb;
+	'a' 768 rgb2cmap;
+};
+
+defn
+Memcmap(addr) {
+	complex Memcmap addr;
+	print("	cmap2rgb	", addr.cmap2rgb, "\n");
+	print("	rgb2cmap	", addr.rgb2cmap, "\n");
+};
+
+sizeofMemsubfont = 32;
+aggr Memsubfont
+{
+	'Y' 0 name;
+	'd' 8 n;
+	'b' 10 height;
+	'C' 11 ascent;
+	'A' Fontchar 16 info;
+	'A' Memimage 24 bits;
+};
+
+defn
+Memsubfont(addr) {
+	complex Memsubfont addr;
+	print("	name	", addr.name\Y, "\n");
+	print("	n	", addr.n, "\n");
+	print("	height	", addr.height, "\n");
+	print("	ascent	", addr.ascent, "\n");
+	print("	info	", addr.info\Y, "\n");
+	print("	bits	", addr.bits\Y, "\n");
+};
+
+Simplesrc = 1;
+Simplemask = 2;
+Replsrc = 4;
+Replmask = 8;
+Fullmask = 16;
+sizeofMemdrawparam = 104;
+aggr Memdrawparam
+{
+	'A' Memimage 0 dst;
+	Rectangle 8 r;
+	'A' Memimage 24 src;
+	Rectangle 32 sr;
+	'A' Memimage 48 mask;
+	Rectangle 56 mr;
+	'D' 72 op;
+	'U' 76 state;
+	'U' 80 mval;
+	'U' 84 mrgba;
+	'U' 88 sval;
+	'U' 92 srgba;
+	'U' 96 sdval;
+};
+
+defn
+Memdrawparam(addr) {
+	complex Memdrawparam addr;
+	print("	dst	", addr.dst\Y, "\n");
+	print("Rectangle r {\n");
+	Rectangle(addr.r);
+	print("}\n");
+	print("	src	", addr.src\Y, "\n");
+	print("Rectangle sr {\n");
+	Rectangle(addr.sr);
+	print("}\n");
+	print("	mask	", addr.mask\Y, "\n");
+	print("Rectangle mr {\n");
+	Rectangle(addr.mr);
+	print("}\n");
+	print("	op	", addr.op, "\n");
+	print("	state	", addr.state, "\n");
+	print("	mval	", addr.mval, "\n");
+	print("	mrgba	", addr.mrgba, "\n");
+	print("	sval	", addr.sval, "\n");
+	print("	srgba	", addr.srgba, "\n");
+	print("	sdval	", addr.sdval, "\n");
+};
+
+complex Memimage memwhite;
+complex Memimage memblack;
+complex Memimage memopaque;
+complex Memimage memtransparent;
+complex Memcmap memdefcmap;
 sizeofMouse = 24;
 aggr Mouse
 {
@@ -963,51 +1119,51 @@ Quaternion(addr) {
 	print("	k	", addr.k, "\n");
 };
 
-sizeofReferenceFrame = 72;
-aggr ReferenceFrame
+sizeofRFrame = 72;
+aggr RFrame
 {
 	Point2 0 p;
-	Point2 24 xb;
-	Point2 48 yb;
+	Point2 24 bx;
+	Point2 48 by;
 };
 
 defn
-ReferenceFrame(addr) {
-	complex ReferenceFrame addr;
+RFrame(addr) {
+	complex RFrame addr;
 	print("Point2 p {\n");
 	Point2(addr.p);
 	print("}\n");
-	print("Point2 xb {\n");
-	Point2(addr.xb);
+	print("Point2 bx {\n");
+	Point2(addr.bx);
 	print("}\n");
-	print("Point2 yb {\n");
-	Point2(addr.yb);
+	print("Point2 by {\n");
+	Point2(addr.by);
 	print("}\n");
 };
 
-sizeofReferenceFrame3 = 128;
-aggr ReferenceFrame3
+sizeofRFrame3 = 128;
+aggr RFrame3
 {
 	Point3 0 p;
-	Point3 32 xb;
-	Point3 64 yb;
-	Point3 96 zb;
+	Point3 32 bx;
+	Point3 64 by;
+	Point3 96 bz;
 };
 
 defn
-ReferenceFrame3(addr) {
-	complex ReferenceFrame3 addr;
+RFrame3(addr) {
+	complex RFrame3 addr;
 	print("Point3 p {\n");
 	Point3(addr.p);
 	print("}\n");
-	print("Point3 xb {\n");
-	Point3(addr.xb);
+	print("Point3 bx {\n");
+	Point3(addr.bx);
 	print("}\n");
-	print("Point3 yb {\n");
-	Point3(addr.yb);
+	print("Point3 by {\n");
+	Point3(addr.by);
 	print("}\n");
-	print("Point3 zb {\n");
-	Point3(addr.zb);
+	print("Point3 bz {\n");
+	Point3(addr.bz);
 	print("}\n");
 };
 
@@ -1053,101 +1209,325 @@ Vertex(addr) {
 	print("}\n");
 };
 
-sizeofTriangle = 24;
-aggr Triangle
+sizeofViewport = 80;
+aggr Viewport
 {
-	Point 0 p0;
-	Point 8 p1;
-	Point 16 p2;
+	{
+	Point2 0 p;
+	Point2 24 bx;
+	Point2 48 by;
+	};
+	'A' Memimage 72 fb;
 };
 
 defn
-Triangle(addr) {
-	complex Triangle addr;
-	print("Point p0 {\n");
-	Point(addr.p0);
-	print("}\n");
-	print("Point p1 {\n");
-	Point(addr.p1);
-	print("}\n");
-	print("Point p2 {\n");
-	Point(addr.p2);
+Viewport(addr) {
+	complex Viewport addr;
+	print("RFrame {\n");
+		RFrame(addr+0);
 	print("}\n");
+	print("	fb	", addr.fb\Y, "\n");
+};
+
+sizeofCamera = 384;
+aggr Camera
+{
+	{
+	Point3 0 p;
+	Point3 32 bx;
+	Point3 64 by;
+	Point3 96 bz;
+	};
+	Viewport 128 viewport;
+	'F' 208 fov;
+	'F' 216 clipn;
+	'F' 224 clipf;
+	'a' 232 proj;
+	'D' 360 ptype;
+	'Y' 368 updatefb;
+	'Y' 376 develop;
 };
 
-sizeof_2_ = 16;
+defn
+Camera(addr) {
+	complex Camera addr;
+	print("RFrame3 {\n");
+		RFrame3(addr+0);
+	print("}\n");
+	print("Viewport viewport {\n");
+	Viewport(addr.viewport);
+	print("}\n");
+	print("	fov	", addr.fov, "\n");
+	print("	clipn	", addr.clipn, "\n");
+	print("	clipf	", addr.clipf, "\n");
+	print("	proj	", addr.proj, "\n");
+	print("	ptype	", addr.ptype, "\n");
+	print("	updatefb	", addr.updatefb\Y, "\n");
+	print("	develop	", addr.develop\Y, "\n");
+};
+
+OBJVGeometric = 0;
+OBJVTexture = 1;
+OBJVNormal = 2;
+OBJVParametric = 3;
+OBJNVERT = 4;
+OBJEPoint = 0;
+OBJELine = 1;
+OBJEFace = 2;
+OBJECurve = 3;
+OBJECurve2 = 4;
+OBJESurface = 5;
+OBJGGlobal = 0;
+OBJGSmoothing = 1;
+OBJGMerging = 2;
+OBJHTSIZE = 17;
+sizeof_2_ = 32;
 aggr _2_
 {
-	'F' 0 n;
-	'F' 8 f;
+	'F' 0 x;
+	'F' 8 y;
+	'F' 16 z;
+	'F' 24 w;
 };
 
 defn
 _2_(addr) {
 	complex _2_ addr;
-	print("	n	", addr.n, "\n");
-	print("	f	", addr.f, "\n");
+	print("	x	", addr.x, "\n");
+	print("	y	", addr.y, "\n");
+	print("	z	", addr.z, "\n");
+	print("	w	", addr.w, "\n");
 };
 
-sizeofCamera = 296;
-aggr Camera
+sizeof_3_ = 24;
+aggr _3_
+{
+	'F' 0 u;
+	'F' 8 v;
+	'F' 16 vv;
+};
+
+defn
+_3_(addr) {
+	complex _3_ addr;
+	print("	u	", addr.u, "\n");
+	print("	v	", addr.v, "\n");
+	print("	vv	", addr.vv, "\n");
+};
+
+sizeof_4_ = 24;
+aggr _4_
+{
+	'F' 0 i;
+	'F' 8 j;
+	'F' 16 k;
+};
+
+defn
+_4_(addr) {
+	complex _4_ addr;
+	print("	i	", addr.i, "\n");
+	print("	j	", addr.j, "\n");
+	print("	k	", addr.k, "\n");
+};
+
+sizeof_5_ = 32;
+aggr _5_
 {
 	{
-	Point3 0 p;
-	Point3 32 xb;
-	Point3 64 yb;
-	Point3 96 zb;
+	'F' 0 x;
+	'F' 8 y;
+	'F' 16 z;
+	'F' 24 w;
+	};
+	{
+	'F' 0 u;
+	'F' 8 v;
+	'F' 16 vv;
+	};
+	{
+	'F' 0 i;
+	'F' 8 j;
+	'F' 16 k;
 	};
-	'A' Image 128 viewport;
-	'F' 136 fov;
-	_2_ 144 clip;
-	'D' 160 ptype;
-	'a' 168 proj;
 };
 
 defn
-Camera(addr) {
-	complex Camera addr;
-	print("ReferenceFrame3 {\n");
-		ReferenceFrame3(addr+0);
+_5_(addr) {
+	complex _5_ addr;
+	print("_2_ {\n");
+		_2_(addr+0);
 	print("}\n");
-	print("	viewport	", addr.viewport\Y, "\n");
-	print("	fov	", addr.fov, "\n");
-	print("_2_ clip {\n");
-	_2_(addr.clip);
+	print("_3_ {\n");
+		_3_(addr+0);
 	print("}\n");
-	print("	ptype	", addr.ptype, "\n");
-	print("	proj	", addr.proj, "\n");
+	print("_4_ {\n");
+		_4_(addr+0);
+	print("}\n");
+};
+
+sizeofOBJVertex = 32;
+aggr OBJVertex
+{
+	{
+	{
+	'F' 0 x;
+	'F' 8 y;
+	'F' 16 z;
+	'F' 24 w;
+	};
+	{
+	'F' 0 u;
+	'F' 8 v;
+	'F' 16 vv;
+	};
+	{
+	'F' 0 i;
+	'F' 8 j;
+	'F' 16 k;
+	};
+	};
+};
+
+defn
+OBJVertex(addr) {
+	complex OBJVertex addr;
+	print("_5_ {\n");
+		_5_(addr+0);
+	print("}\n");
+};
+
+sizeofOBJVertexArray = 16;
+aggr OBJVertexArray
+{
+	'A' OBJVertex 0 verts;
+	'D' 8 nvert;
+};
+
+defn
+OBJVertexArray(addr) {
+	complex OBJVertexArray addr;
+	print("	verts	", addr.verts\Y, "\n");
+	print("	nvert	", addr.nvert, "\n");
+};
+
+sizeofOBJElem = 24;
+aggr OBJElem
+{
+	'Y' 0 indices;
+	'D' 8 nindex;
+	'D' 12 type;
+	'A' OBJElem 16 next;
+};
+
+defn
+OBJElem(addr) {
+	complex OBJElem addr;
+	print("	indices	", addr.indices\Y, "\n");
+	print("	nindex	", addr.nindex, "\n");
+	print("	type	", addr.type, "\n");
+	print("	next	", addr.next\Y, "\n");
+};
+
+sizeofOBJObject = 24;
+aggr OBJObject
+{
+	'Y' 0 name;
+	'A' OBJElem 8 child;
+	'A' OBJObject 16 next;
+};
+
+defn
+OBJObject(addr) {
+	complex OBJObject addr;
+	print("	name	", addr.name\Y, "\n");
+	print("	child	", addr.child\Y, "\n");
+	print("	next	", addr.next\Y, "\n");
 };
 
-STACK = 8192;
-SEC = 1000;
-FPS = 60;
+sizeofOBJ = 200;
+aggr OBJ
+{
+	'a' 0 vertdata;
+	'a' 64 objtab;
+};
+
+defn
+OBJ(addr) {
+	complex OBJ addr;
+	print("	vertdata	", addr.vertdata, "\n");
+	print("	objtab	", addr.objtab, "\n");
+};
+
+K↑ = 0;
+K↓ = 1;
+K← = 2;
+K→ = 3;
+Krise = 4;
+Kfall = 5;
+KR↑ = 6;
+KR↓ = 7;
+KR← = 8;
+KR→ = 9;
+KR↺ = 10;
+KR↻ = 11;
+Kcam0 = 12;
+Kcam1 = 13;
+Kcam2 = 14;
+Kcam3 = 15;
+Kscrshot = 16;
+Ke = 17;
 Scamno = 0;
-Scampos = 1;
-Scambs = 2;
-Sfov = 3;
-Se = 4;
+Sfov = 1;
+Scampos = 2;
+Scambx = 3;
+Scamby = 4;
+Scambz = 5;
+Se = 6;
+sizeofCamcfg = 128;
+aggr Camcfg
+{
+	Point3 0 p;
+	Point3 32 lookat;
+	Point3 64 up;
+	'F' 96 fov;
+	'F' 104 clipn;
+	'F' 112 clipf;
+	'D' 120 ptype;
+};
+
+defn
+Camcfg(addr) {
+	complex Camcfg addr;
+	print("Point3 p {\n");
+	Point3(addr.p);
+	print("}\n");
+	print("Point3 lookat {\n");
+	Point3(addr.lookat);
+	print("}\n");
+	print("Point3 up {\n");
+	Point3(addr.up);
+	print("}\n");
+	print("	fov	", addr.fov, "\n");
+	print("	clipn	", addr.clipn, "\n");
+	print("	clipf	", addr.clipf, "\n");
+	print("	ptype	", addr.ptype, "\n");
+};
+
 complex Mousectl mctl;
-complex Keyboardctl kctl;
-complex ReferenceFrame scrrf;
-complex RWLock worldlock;
-complex Triangle3 tri;
-complex Camera cam0;
-complex Camera cam1;
-complex Camera cam2;
-complex Camera cam3;
+complex Channel drawc;
 complex Camera maincam;
 complex Fmt vfmt:f;
 complex Point2 vfmt:p;
 complex Fmt Vfmt:f;
 complex Point3 Vfmt:p;
-complex Point3 flatten:p;
-complex Point2 toscreen:p;
-complex Point fromscreen:p;
-complex Triangle redraw:trit;
-complex Quaternion key:q;
-complex Quaternion key:qtmp;
+complex Triangle3 depthcmp:ta;
+complex Triangle3 depthcmp:tb;
+complex Point3 drawaxis:op;
+complex Point3 drawaxis:px;
+complex Point3 drawaxis:py;
+complex Point3 drawaxis:pz;
+complex OBJ threadmain:objmesh;
 MOUSE = 0;
-KBD = 1;
-RESIZE = 2;
+RESIZE = 1;
+DRAW = 2;
diff --git a/main.c b/main.c
index 703fbac..db2ebf7 100644
--- a/main.c
+++ b/main.c
@@ -2,16 +2,16 @@
 #include <libc.h>
 #include <thread.h>
 #include <draw.h>
+#include <memdraw.h>
 #include <mouse.h>
 #include <keyboard.h>
-#include "geometry.h"
-#include "graphics.h"
-#include "obj.h"
+#include <geometry.h>
+#include <graphics.h>
+#include <obj.h>
 #include "dat.h"
 #include "fns.h"
 
 typedef struct Camcfg Camcfg;
-
 struct Camcfg
 {
 	Point3 p, lookat, up;
@@ -46,21 +46,28 @@ Channel *drawc;
 int kdown;
 vlong t0, t;
 double Δt;
-//Mesh model;
 char *mdlpath = "../threedee/mdl/rocket.obj";
 
-Camera *cams[4], *maincam;
+Camera cams[4], *maincam;
 Camcfg camcfgs[4] = {
-	Pt3(2,0,-4,1), Pt3(0,0,0,1), Vec3(0,1,0),
+	2,0,-4,1,
+	0,0,0,1,
+	0,1,0,0,
 	90, 0.1, 100, Ppersp,
 
-	Pt3(-2,0,-4,1), Pt3(0,0,0,1), Vec3(0,1,0),
+	-2,0,-4,1,
+	0,0,0,1,
+	0,1,0,0,
 	120, 0.1, 100, Ppersp,
 
-	Pt3(-2,0,4,1), Pt3(0,0,0,1), Vec3(0,1,0),
+	-2,0,4,1,
+	0,0,0,1,
+	0,1,0,0,
 	90, 0.1, 100, Ppersp,
 
-	Pt3(2,0,4,1), Pt3(0,0,0,1), Vec3(0,1,0),
+	2,0,4,1,
+	0,0,0,1,
+	0,1,0,0,
 	120, 0.1, 100, Ppersp
 };
 
@@ -114,8 +121,8 @@ depthcmp(void *a, void *b)
 	Triangle3 *ta, *tb;
 	double za, zb;
 
-	ta = (Triangle3 *)a;
-	tb = (Triangle3 *)b;
+	ta = (Triangle3*)a;
+	tb = (Triangle3*)b;
 	za = (ta->p0.z + ta->p1.z + ta->p2.z)/3;
 	zb = (tb->p0.z + tb->p1.z + tb->p2.z)/3;
 	return zb-za;
@@ -124,10 +131,10 @@ depthcmp(void *a, void *b)
 void
 drawaxis(void)
 {
-	Point3	op = (Point3){0, 0, 0, 1},
-		px = (Point3){1, 0, 0, 1},
-		py = (Point3){0, 1, 0, 1},
-		pz = (Point3){0, 0, 1, 1};
+	Point3	op = Pt3(0,0,0,1),
+		px = Pt3(1,0,0,1),
+		py = Pt3(0,1,0,1),
+		pz = Pt3(0,0,1,1);
 
 	line3(maincam, op, px, 0, Endarrow, display->black);
 	string3(maincam, px, display->black, font, "x");
@@ -142,14 +149,14 @@ drawstats(void)
 {
 	int i;
 
-	snprint(stats[Scamno], sizeof(stats[Scamno]), "CAM %lld", maincam-cams[0]+1);
+	snprint(stats[Scamno], sizeof(stats[Scamno]), "CAM %lld", maincam-cams+1);
 	snprint(stats[Sfov], sizeof(stats[Sfov]), "FOV %g°", maincam->fov);
 	snprint(stats[Scampos], sizeof(stats[Scampos]), "%V", maincam->p);
 	snprint(stats[Scambx], sizeof(stats[Scambx]), "bx %V", maincam->bx);
 	snprint(stats[Scamby], sizeof(stats[Scamby]), "by %V", maincam->by);
 	snprint(stats[Scambz], sizeof(stats[Scambz]), "bz %V", maincam->bz);
 	for(i = 0; i < Se; i++)
-		stringn(maincam->viewport, addpt(screen->r.min, Pt(10,10 + i*font->height)), display->black, ZP, font, stats[i], sizeof(stats[i]));
+		string(screen, addpt(screen->r.min, Pt(10,10 + i*font->height)), display->black, ZP, font, stats[i]);
 }
 
 void
@@ -184,7 +191,7 @@ redraw(void)
 //		/* clipping */
 //		/*
 //		 * no clipping for now, the whole triangle is ignored
-//		 * if any of its vertices gets outside the fustrum.
+//		 * if any of its vertices gets outside the frustum.
 //		 */
 //		if(isclipping(tmp.p0) || isclipping(tmp.p1) || isclipping(tmp.p2))
 //			continue;
@@ -198,6 +205,7 @@ redraw(void)
 //		nvistri++;
 //	}
 //	qsort(vistris, nvistri, sizeof(TTriangle3), depthcmp);
+
 	lockdisplay(display);
 	draw(maincam->viewport, maincam->viewport->r, display->white, nil, ZP);
 	drawaxis();
@@ -332,13 +340,13 @@ handlekeys(void)
 	if(kdown & 1<<KR↻)
 		placecamera(maincam, maincam->p, maincam->bz, qrotate(maincam->by, maincam->bz, -5*DEG));
 	if(kdown & 1<<Kcam0)
-		maincam = cams[0];
+		maincam = &cams[0];
 	if(kdown & 1<<Kcam1)
-		maincam = cams[1];
+		maincam = &cams[1];
 	if(kdown & 1<<Kcam2)
-		maincam = cams[2];
+		maincam = &cams[2];
 	if(kdown & 1<<Kcam3)
-		maincam = cams[3];
+		maincam = &cams[3];
 	if(kdown & 1<<Kscrshot)
 		screenshot();
 }
@@ -350,7 +358,8 @@ resize(void)
 	if(getwindow(display, Refnone) < 0)
 		fprint(2, "can't reattach to window\n");
 	unlockdisplay(display);
-	maincam->updatefb(maincam, screen->r, screen->chan);
+	maincam->viewport = screen;
+	reloadcamera(maincam);
 }
 
 void
@@ -381,11 +390,10 @@ threadmain(int argc, char *argv[])
 	if((mctl = initmouse(nil, screen)) == nil)
 		sysfatal("initmouse: %r");
 	for(i = 0; i < nelem(cams); i++){
-		cams[i] = alloccamera(screen->r, screen->chan);
-		placecamera(cams[i], camcfgs[i].p, camcfgs[i].lookat, camcfgs[i].up);
-		configcamera(cams[i], camcfgs[i].fov, camcfgs[i].clipn, camcfgs[i].clipf, camcfgs[i].ptype);
+		placecamera(&cams[i], camcfgs[i].p, camcfgs[i].lookat, camcfgs[i].up);
+		configcamera(&cams[i], screen, camcfgs[i].fov, camcfgs[i].clipn, camcfgs[i].clipf, camcfgs[i].ptype);
 	}
-	maincam = cams[0];
+	maincam = &cams[0];
 	if((objmesh = objparse(mdlpath)) == nil)
 		sysfatal("objparse: %r");
 	drawc = chancreate(1, 0);
diff --git a/mkfile b/mkfile
index c56ce21..7e1d254 100644
--- a/mkfile
+++ b/mkfile
@@ -5,29 +5,35 @@ TARG=3d
 OFILES=\
 	main.$O\
 
-HFILES=geometry.h graphics.h obj.h dat.h fns.h
+HFILES=libgeometry/geometry.h\
+	libgraphics/graphics.h\
+	libobj/obj.h\
+	dat.h\
+	fns.h\
 
 LIB=\
-	libgeometry.a$O\
-	libgraphics.a$O\
-	libobj.a$O
+	libobj/libobj.a$O\
+	libgraphics/libgraphics.a$O\
+	libgeometry/libgeometry.a$O\
+
+CFLAGS=$CFLAGS -I. -Ilibgeometry -Ilibgraphics -Ilibobj
 
 </sys/src/cmd/mkone
 
-libgeometry.a$O:
+libgeometry/libgeometry.a$O:
 	cd libgeometry
 	mk install
 
-libgraphics.a$O:
+libgraphics/libgraphics.a$O:
 	cd libgraphics
 	mk install
 
-libobj.a$O:
+libobj/libobj.a$O:
 	cd libobj
 	mk install
 
 clean nuke:V:
-	rm -f *.[$OS] [$OS].out y.tab.? y.debug y.output $TARG
+	rm -f *.[$OS] [$OS].out $TARG
 	@{cd libgeometry; mk $target}
 	@{cd libgraphics; mk $target}
 	@{cd libobj; mk $target}
diff --git a/obj.h b/obj.h
deleted file mode 100644
index 19bfdcb..0000000
--- a/obj.h
+++ /dev/null
@@ -1,92 +0,0 @@
-/* vertex types */
-enum {
-	OBJVGeometric,
-	OBJVTexture,
-	OBJVNormal,
-	OBJVParametric,
-	OBJNVERT
-};
-/* element types */
-enum {
-	OBJEPoint,
-	OBJELine,
-	OBJEFace,
-	OBJECurve,
-	OBJECurve2,
-	OBJESurface
-};
-/* grouping types */
-enum {
-	OBJGGlobal,
-	OBJGSmoothing,
-	OBJGMerging
-};
-/* object hash table size */
-enum {
-	OBJHTSIZE = 17
-};
-
-typedef struct OBJVertex OBJVertex;
-typedef struct OBJVertexArray OBJVertexArray;
-typedef struct OBJElem OBJElem;
-//typedef struct OBJGroup OBJGroup;
-typedef struct OBJObject OBJObject;
-typedef struct OBJ OBJ;
-
-#pragma varargck type "O" OBJ*
-
-struct OBJVertex
-{
-	union {
-		struct { double x, y, z, w; };	/* geometric */
-		struct { double u, v, vv; };	/* texture and parametric */
-		struct { double i, j, k; };	/* normal */
-	};
-};
-
-struct OBJVertexArray
-{
-	OBJVertex *verts;
-	int nvert;
-};
-
-struct OBJElem
-{
-	int *indices;
-	int nindex;
-	int type;
-	OBJElem *next;
-};
-
-//struct OBJGroup
-//{
-//	char *name;
-//	int type;
-//	OBJElem *elem0;
-//	OBJGroup *next;
-//};
-//struct OBJObject
-//{
-//	char *name;
-//	OBJGroup *grptab[OBJHTSIZE];
-//	OBJObject *next;
-//};
-
-struct OBJObject
-{
-	char *name;
-	OBJElem *child;
-	OBJObject *next;
-};
-
-struct OBJ
-{
-	OBJVertexArray vertdata[OBJNVERT];
-	OBJObject *objtab[OBJHTSIZE];
-};
-
-OBJ *objparse(char*);
-void objfree(OBJ*);
-
-int OBJfmt(Fmt*);
-void OBJfmtinstall(void);