Initial commit.

code/qcommon/cm_polylib.h

@@ -0,0 +1,51 @@
+
+// this is only used for visualization tools in cm_ debug functions
+
+#ifndef CM_POLYLIB_H
+#define CM_POLYLIB_H
+
+typedef struct
+{
+	int		numpoints;
+	vec3_t	p[4];		// variable sized
+} winding_t;
+
+#define	MAX_POINTS_ON_WINDING	64
+
+#define	SIDE_FRONT	0
+#define	SIDE_BACK	1
+#define	SIDE_ON		2
+#define	SIDE_CROSS	3
+
+#define	CLIP_EPSILON	0.1
+
+#define MAX_MAP_BOUNDS			65535
+
+// you can define on_epsilon in the makefile as tighter
+#ifndef	ON_EPSILON
+#define	ON_EPSILON	0.1f
+#endif
+
+winding_t	*AllocWinding (int points);
+vec_t	WindingArea (winding_t *w);
+void	WindingCenter (winding_t *w, vec3_t center);
+void	ClipWindingEpsilon (winding_t *in, vec3_t normal, vec_t dist, 
+				vec_t epsilon, winding_t **front, winding_t **back);
+winding_t	*ChopWinding (winding_t *in, vec3_t normal, vec_t dist);
+winding_t	*CopyWinding (winding_t *w);
+winding_t	*ReverseWinding (winding_t *w);
+winding_t	*BaseWindingForPlane (vec3_t normal, vec_t dist);
+void	CheckWinding (winding_t *w);
+void	WindingPlane (winding_t *w, vec3_t normal, vec_t *dist);
+void	RemoveColinearPoints (winding_t *w);
+int		WindingOnPlaneSide (winding_t *w, vec3_t normal, vec_t dist);
+void	FreeWinding (winding_t *w);
+void	WindingBounds (winding_t *w, vec3_t mins, vec3_t maxs);
+
+void	AddWindingToConvexHull( winding_t *w, winding_t **hull, vec3_t normal );
+
+void	ChopWindingInPlace (winding_t **w, vec3_t normal, vec_t dist, vec_t epsilon);
+// frees the original if clipped
+
+void pw(winding_t *w);
+#endif