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- /*
- * triangle.h
- *
- * Copyright (C) 1989, 1991, Craig E. Kolb
- * All rights reserved.
- *
- * This software may be freely copied, modified, and redistributed
- * provided that this copyright notice is preserved on all copies.
- *
- * You may not distribute this software, in whole or in part, as part of
- * any commercial product without the express consent of the authors.
- *
- * There is no warranty or other guarantee of fitness of this software
- * for any purpose. It is provided solely "as is".
- *
- * $Id: triangle.h,v 4.0 91/07/17 14:39:43 kolb Exp Locker: kolb $
- *
- * $Log: triangle.h,v $
- * Revision 4.0 91/07/17 14:39:43 kolb
- * Initial version.
- *
- */
- #ifndef TRIANGLE_H
- #define TRIANGLE_H
-
- #define FLATTRI 0
- #define PHONGTRI 1
-
- #define GeomTriangleCreate(t,a,b,c,d,e,f,g,h,i,s) GeomCreate( \
- (GeomRef)TriangleCreate(t,a,b,c,d,e,f,g,h,i,s), TriangleMethods())
-
- /*
- * Triangle
- */
- typedef struct {
- Vector nrm, /* triangle normal */
- p[3], /* vertices */
- e[3], /* "edge" vectors (scaled) */
- *vnorm, /* Array of vertex normals */
- *dpdu, *dpdv; /* U and V direction vectors */
- Float d, /* plane constant */
- b[3]; /* Array of barycentric coordinates */
- Vec2d *uv; /* Array of UV coordinates of vertices */
- char index, /* Flag used for shading/intersection test. */
- type; /* type (to detect if phong or flat) */
- } Triangle;
-
- extern Triangle *TriangleCreate();
- extern int TriangleIntersect(), TriangleNormal();
- extern void TriangleBounds(), TriangleUV(),
- TriangleStats();
- extern Methods *TriangleMethods();
- char *TriangleName();
- #endif /* TRIANGLE_H */
-