fix the geometry glitches when moving things around.

it's possible for interactive programs to keep updating
the geometry of the scene during rendering, which caused
primitives to look deformed or shattered in the final
image.

to avoid this we take a snapshot of the current state of
things (scene and camera), and render based on that copy.

1 files changed, 8 insertions, 2 deletions

diff --git a/graphics.h b/graphics.h
index fbeea2f..47a41cd 100644
--- a/graphics.h
+++ b/graphics.h
@@ -156,6 +156,7 @@ struct Model
 struct Entity
 {
 	RFrame3;
+	char *name;
 	Model *mdl;
 
 	Entity *prev, *next;
@@ -294,10 +295,10 @@ struct Camera
 };
 
 /* camera */
+void reloadcamera(Camera*);
 void configcamera(Camera*, Viewport*, double, double, double, Projection);
 void placecamera(Camera*, Point3, Point3, Point3);
 void aimcamera(Camera*, Point3);
-void reloadcamera(Camera*);
 void shootcamera(Camera*, Shadertab*);
 
 /* viewport */
@@ -326,10 +327,13 @@ void orthographic(Matrix3, double, double, double, double, double, double);
 /* scene */
 int loadobjmodel(Model*, OBJ*);
 Model *newmodel(void);
+Model *dupmodel(Model*);
 void delmodel(Model*);
-Entity *newentity(Model*);
+Entity *newentity(char*, Model*);
+Entity *dupentity(Entity*);
 void delentity(Entity*);
 Scene *newscene(char*);
+Scene *dupscene(Scene*);
 void delscene(Scene*);
 void clearscene(Scene*);
 
@@ -339,6 +343,7 @@ Vertexattr *getvattr(Vertex*, char*);
 
 /* texture */
 Texture *alloctexture(int, Memimage*);
+Texture *duptexture(Texture*);
 void freetexture(Texture*);
 Color neartexsampler(Texture*, Point2);
 Color bilitexsampler(Texture*, Point2);
@@ -353,6 +358,7 @@ double fmax(double, double);
 Point2 modulapt2(Point2, Point2);
 Point3 modulapt3(Point3, Point3);
 Memimage *rgb(ulong);
+Memimage *dupmemimage(Memimage*);
 
 /* color */
 Color srgb2linear(Color);