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/* Copyright (c) 1991 Regents of the University of California */ |
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/* SCCSid "$SunId$ LBL" */ |
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/* |
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* Common definitions for interreflection routines. |
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*/ |
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/* |
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* Since we've defined our vectors as float below to save space, |
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* watch out for changes in the definitions of VCOPY() and DOT() |
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* and don't pass these vectors to fvect routines. |
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*/ |
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typedef struct ambrec { |
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unsigned long latick; /* last accessed tick */ |
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float pos[3]; /* position in space */ |
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float dir[3]; /* normal direction */ |
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int lvl; /* recursion level of parent ray */ |
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float weight; /* weight of parent ray */ |
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float rad; /* validity radius */ |
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COLOR val; /* computed ambient value */ |
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float gpos[3]; /* gradient wrt. position */ |
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float gdir[3]; /* gradient wrt. direction */ |
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struct ambrec *next; /* next in list */ |
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} AMBVAL; /* ambient value */ |
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extern COLOR ambval; /* global ambient component */ |
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extern int ambvwt; /* initial weight for ambient value */ |
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extern double ambacc; /* ambient accuracy */ |
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extern int ambres; /* ambient resolution */ |
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extern int ambdiv; /* number of divisions for calculation */ |
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extern int ambssamp; /* number of super-samples */ |
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extern int ambounce; /* number of ambient bounces */ |
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extern char *amblist[]; /* ambient include/exclude list */ |
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extern int ambincl; /* include == 1, exclude == 0 */ |
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extern double maxarad; /* maximum ambient radius */ |
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extern double minarad; /* minimum ambient radius */ |
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extern double sumambient(), doambient(), makeambient(); |
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#define AVGREFL 0.5 /* assumed average reflectance */ |
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#define AMBVALSIZ 75 /* number of bytes in portable AMBVAL struct */ |
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#define AMBMAGIC 557 /* magic number for ambient value files */ |
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#define AMBFMT "Radiance_ambval" /* format id string */ |
