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-rw-r--r--doc/libgraphics.ms163
-rw-r--r--doc/libgraphics.pdfbin34494 -> 38208 bytes
-rw-r--r--doc/libgraphics.ps2310
3 files changed, 1334 insertions, 1139 deletions
diff --git a/doc/libgraphics.ms b/doc/libgraphics.ms
index f25e270..aedb662 100644
--- a/doc/libgraphics.ms
+++ b/doc/libgraphics.ms
@@ -30,16 +30,32 @@ Write the intro last.
.NH
The scene
.PP
-A scene is a container, represented as a graph, that hosts the
-entities that make up the world. Each of these entities has a model
-made out of a series of meshes, which in turn are made out of
-geometric primitives (only
+.P1
+struct Scene
+{
+ char *name;
+ Entity ents;
+ ulong nents;
+ Cubemap *skybox;
+
+ void (*addent)(Scene*, Entity*);
+ void (*delent)(Scene*, Entity*);
+};
+.P2
+.PP
+A
+.I scene
+is a container, represented as a graph, that hosts the entities that
+make up the world. Each of these entities has a model made out of a
+series of meshes, which in turn are made out of geometric primitives
+(only
.I points ,
.I lines
and
.I triangles
are supported). Each model also stores a list of materials.
.PP
+.KS
.PS
.ps 7
boxwid = 0.5
@@ -62,16 +78,64 @@ reset
.ps 10
.PE
.FI "The scene graph."
+.KE
.NH 2
Entities
+.PP
+.P1
+struct Entity
+{
+ RFrame3;
+ char *name;
+ Model *mdl;
+
+ Entity *prev, *next;
+};
+.P2
+.PP
+.I Entities
+represent physical objects in the scene.
.NH 2
Models
+.PP
+.P1
+struct Model
+{
+ Primitive *prims;
+ ulong nprims;
+ Material *materials;
+ ulong nmaterials;
+};
+.P2
.NH 2
Meshes
.NH 2
Primitives
+.PP
+.P1
+struct Primitive
+{
+ int type;
+ Vertex v[3];
+ Material *mtl;
+ Point3 tangent; /* used for normal mapping */
+};
+.P2
.NH 2
Materials
+.PP
+.P1
+struct Material
+{
+ char *name;
+ Color ambient;
+ Color diffuse;
+ Color specular;
+ double shininess;
+ Texture *diffusemap;
+ Texture *normalmap;
+};
+.P2
.NH
Cameras
.PP
@@ -95,7 +159,7 @@ seen in
spawned with a call to
.CW initgraphics ,
each representing a stage of the pipeline:
-.IP •
+.IP "S1:"
The
.B renderer
process, the root of the tree, waits on a
@@ -107,40 +171,7 @@ camera and a shader table. It walks the scene and sends each
.CW Entity
individually to the
entityproc.
-.IP •
-The
-.B entityproc
-receives an entity and splits its geometry equitatively among the
-tilers, sending a batch for each of them to process.
-.IP •
-Next, each
-.B tiler
-gets to work on their subset of the geometry (potentially in
-parallel)—see
-.B "Figure 3" .
-They walk the list of primitives, then for each of them
-apply the
-.B "vertex shader"
-to its vertices (which expects clip space coordinates in return),
-perform frustum culling and clipping, back-face culling, and then
-project them into the viewport (screen space). Following this step,
-they build a bounding box, used to allocate each primitive into a
-rasterization bucket, or
-.B tile ,
-managed by one of the rasterizers; as illustrated in
-.B "Figure 4" .
-If it spans multiple tiles, it will be copied and sent to each of
-them.
-.IP •
-Finally, the
-.B rasterizers
-receive the primitive in screen space, slice it to fit their tile, and
-apply a rasterization routine based on its type. For each of the pixels, a
-.B "depth test"
-is performed, discarding fragments that are further away. Then a
-.B "fragment shader"
-is applied and the result written to the framebuffer after blending.
-.PP
+.KS
.PS
.ps 7
circlerad = 0.3
@@ -188,6 +219,32 @@ arrow from Tiler.T1 to Raster.Rn chop
.ps 10
.PE
.FI "The rendering graph for a \fB2n\fR processor machine."
+.KE
+.IP "S2:"
+The
+.B entityproc
+receives an entity and splits its geometry equitatively among the
+tilers, sending a batch for each of them to process.
+.IP "S3:"
+Next, each
+.B tiler
+gets to work on their subset of the geometry (potentially in
+parallel)—see
+.B "Figure 3" .
+They walk the list of primitives, then for each of them
+apply the
+.B "vertex shader"
+to its vertices (which expects clip space coordinates in return),
+perform frustum culling and clipping, back-face culling, and then
+project them into the viewport (screen space). Following this step,
+they build a bounding box, used to allocate each primitive into a
+rasterization bucket, or
+.B tile ,
+managed by one of the rasterizers; as illustrated in
+.B "Figure 4" .
+If it spans multiple tiles, it will be copied and sent to each of
+them.
+.KS
.PS
.ps 7
Tiles: [
@@ -219,6 +276,18 @@ line from Tiles.Tn.e to Raster.Rn.w
.ps 10
.PE
.FI "Per tile rasterizers."
+.KE
+.IP "S4:"
+Finally, the
+.B rasterizers
+receive the primitive in screen space, slice it to fit their tile, and
+apply a rasterization routine based on its type. For each of the pixels, a
+.B "depth test"
+is performed, discarding fragments that are further away. Then a
+.B "fragment shader"
+is applied and the result written to the framebuffer after blending.
+.PP
+.KS
.PS
.ps 7
Tiles: [
@@ -252,10 +321,12 @@ arrow from Tiles.Tn.e to Raster.Rn.w
.ps 10
.PE
.FI "Raster task scheduling."
+.KE
.NH
Frames of reference
.PP
Frames are right-handed throughout every stage.
+.KS
.PS
.ps 7
RFrame: [
@@ -275,6 +346,7 @@ RFrame: [
.ps 10
.PE
.FI "Example right-handed rframe."
+.KE
.NH
Viewports
.PP
@@ -287,12 +359,18 @@ after a call to its
.CW draw
or
.CW memdraw
-methods. As of now, the only feature available is upscaling, which
+methods. So far the only feature available is upscaling, which
includes user-defined filters for specific ratios, such as the family
of pixel art filters
.I Scale[234]x ,
used for 2x2, 3x3 and 4x4 scaling
-.I [?] . respectively
+.I [REF01] . respectively
+Users control it with calls to the viewport's
+.CW setscale
+and
+.CW setscalefilter
+methods.
+.KS
.PS
.ps 7
View: [
@@ -310,8 +388,9 @@ View: [
.ps 10
.PE
.FI "Illustration of a 3:2 viewport."
+.KE
.SH
References
.PP
-.IP [?]
+.IP [REF01]
https://www.scale2x.it/
diff --git a/doc/libgraphics.pdf b/doc/libgraphics.pdf
index 0651640..6566ab3 100644
--- a/doc/libgraphics.pdf
+++ b/doc/libgraphics.pdf
Binary files differ
diff --git a/doc/libgraphics.ps b/doc/libgraphics.ps
index 2a4cceb..a5b6b46 100644
--- a/doc/libgraphics.ps
+++ b/doc/libgraphics.ps
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@@ -848,1099 +805,1258 @@ mark
2 pagesetup
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10 /LucidaSans-Demi f
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10 /LucidaSans-Italic f
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10 /LucidaSans-Italic f
-([?]) 3621 1476 w
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10 /LucidaSansUnicode00 f
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7 /LucidaSansUnicode00 f
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10 /LucidaSansUnicode00 f
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10 /LucidaSans-Demi f
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10 /LucidaSansUnicode00 f
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-%%EndPage: 4 4
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%%Trailer
done
%%DocumentFonts: LucidaSansUnicode20 LucidaSansUnicode00 LucidaSans-Demi LucidaSans-Italic LucidaTypewriter
-%%Pages: 4
+%%Pages: 5