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greg |
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/* Copyright (c) 1986 Regents of the University of California */
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/* SCCSid "$SunId$ LBL" */
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/*
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* source.h - header file for ray tracing sources.
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*
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* 8/20/85
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*/
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#define SDISTANT 01 /* source distant flag */
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#define SSKIP 02 /* source skip flag */
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#define SPROX 04 /* source proximity flag */
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#define SSPOT 010 /* source spotlight flag */
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typedef struct {
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float siz; /* output solid angle */
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float flen; /* focal length */
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FVECT aim; /* aim direction */
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} SPOT; /* spotlight */
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typedef struct {
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short sflags; /* source flags */
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FVECT sloc; /* direction or position of source */
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float ss; /* tangent or disk radius */
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float ss2; /* domega or projected area */
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union {
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float prox; /* proximity */
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SPOT *s; /* spot */
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} sl; /* localized source information */
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OBJREC *so; /* source object */
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} SOURCE; /* light source */
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#define MAXSOURCE 512 /* maximum # of sources */
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extern SOURCE srcval[MAXSOURCE]; /* our source list */
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extern int nsources; /* the number of sources */
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extern double srcray(); /* ray to source */
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extern SPOT *makespot(); /* make spotlight */
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