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SGI Developer Toolbox 6.1
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SGI Developer Toolbox 6.1 - Disc 4.iso
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public
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rayshade
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libray
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libobj
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triangle.h
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C/C++ Source or Header
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1994-08-01
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2KB
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55 lines
/*
* 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 */