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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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/* |
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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 AIMREQT 100 /* required aim success/failure */ |
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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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#define SVIRTUAL 020 /* source virtual flag */ |
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#define SFLAT 040 /* source flat flag */ |
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#define SFOLLOW 0100 /* source follow path flag */ |
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typedef struct { |
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FVECT aim; /* aim direction or center */ |
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float siz; /* output solid angle or area */ |
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float flen; /* focal length */ |
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} SPOT; /* spotlight */ |
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typedef struct { |
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int sflags; /* source flags */ |
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FVECT sloc; /* direction or position of source */ |
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FVECT snorm; /* surface normal of flat 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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struct { |
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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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union { |
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int success; /* successes - AIMREQT*failures */ |
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int svnext; /* next source to aim for */ |
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} sa; /* source aiming information */ |
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long ntests, nhits; /* shadow tests and hits */ |
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OBJREC *so; /* source destination object */ |
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} SRCREC; /* light source */ |
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typedef struct { |
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FVECT dir; /* source direction */ |
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float dom; /* domega for source */ |
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COLOR val; /* contribution */ |
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} CONTRIB; /* direct contribution */ |
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typedef struct { |
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int sno; /* source number */ |
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float brt; /* brightness (for comparison) */ |
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} CNTPTR; /* contribution pointer */ |
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extern SRCREC *source; /* 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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extern SRCREC *newsource(); /* allocate new source */ |
