X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Fpolyclip.h;h=adee29ddb74e2cd145a24b59fc9b1c9d0778ca31;hp=c6745e374d784de938bb79e467663ba48d8dea1d;hb=d956a9d9273eebfacfda58cb3bafff017269d5dc;hpb=dac99aab001a4589f2947e03a917e45b94033c98

diff --git a/src/polyclip.h b/src/polyclip.h
index c6745e3..adee29d 100644
--- a/src/polyclip.h
+++ b/src/polyclip.h
@@ -8,7 +8,13 @@ struct cplane {
 	float nx, ny, nz;
 };
 
-/* Polygon clipper
+enum {
+	CLIP_LEFT, CLIP_RIGHT,
+	CLIP_BOTTOM, CLIP_TOP,
+	CLIP_NEAR, CLIP_FAR
+};
+
+/* Generic polygon clipper
  * returns:
  *  1 -> fully inside, not clipped
  *  0 -> straddling the plane and clipped
@@ -19,4 +25,14 @@ struct cplane {
 int clip_poly(struct g3d_vertex *vout, int *voutnum,
 		const struct g3d_vertex *vin, int vnum, struct cplane *plane);
 
+/* only checks if the polygon would be clipped by the plane, and classifies it
+ * as inside/outside/straddling, without actually producing a clipped polygon.
+ * return values are the same as clip_poly.
+ */
+int check_clip_poly(const struct g3d_vertex *v, int vnum, struct cplane *plane);
+
+/* Special-case frustum clipper (might be slightly faster) */
+int clip_frustum(struct g3d_vertex *vout, int *voutnum,
+		const struct g3d_vertex *vin, int vnum, int fplane);
+
 #endif	/* POLYCLIP_H_ */