Screen space clipping and backface culling.

1 files changed, 22 insertions, 2 deletions

diff --git a/render.h b/render.h
index 3c8938f..e51478f 100644
--- a/render.h
+++ b/render.h
@@ -37,10 +37,23 @@ typedef struct Mesh {
 typedef struct {
 	Colour* t;
 	int* d;
-	int w, h, asp;
+	int asp, n;
+	int vp[4];
 	Rect clip;
 } Renderer;
 
+int tri_os(
+	const Renderer* r,
+	const int* v0,
+	const int* v1,
+	const int* v2
+);
+int point_os(
+	const Renderer* r,
+	int x,
+	int y
+);
+
 void ren_begin(Renderer* r, Colour* t, int* d, int w, int h);
 void ren_end(Renderer* r);
 void ren_clear(Renderer* r);
@@ -86,7 +99,14 @@ void ren_tri(
 	const int* v1,
 	const int* v2,
 	const Bitmap* tex
-);
+); /* Unsafe for 3D. Clips against the r->clip */
+void ren_tri3(
+	Renderer* r,
+	const int* v0,
+	const int* v1,
+	const int* v2,
+	const Bitmap* tex
+); /* Does perspective calculation and clips against the near. */
 void ren_mesh(
 	Renderer* r,
 	const Mesh* mesh,