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/* Copyright (c) 1986 Regents of the University of California */ |
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/* SCCSid "$SunId$ LBL" */ |
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/* RCSid $Id$ */ |
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/* |
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* face.h - header for routines using polygonal faces. |
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* 8/30/85 |
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*/ |
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#include "copyright.h" |
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#define VERTEX(f,n) ((f)->va + 3*(n)) |
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typedef struct { /* a polygonal face */ |
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FVECT norm; /* the plane's unit normal */ |
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double offset; /* plane equation: DOT(norm, v) == offset */ |
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double area; /* area of face */ |
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double *va; /* vertex array (o->oargs.farg) */ |
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FLOAT offset; /* plane equation: DOT(norm, v) == offset */ |
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FLOAT area; /* area of face */ |
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FLOAT *va; /* vertex array (o->oargs.farg) */ |
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short nv; /* # of vertices */ |
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short ax; /* axis closest to normal */ |
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} FACE; |
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#ifdef NOPROTO |
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extern FACE *getface(); |
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extern void freeface(); |
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extern int inface(); |
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#else |
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extern FACE *getface(OBJREC *o); |
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extern void freeface(OBJREC *o); |
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extern int inface(FVECT p, FACE *f); |
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#endif |
