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/* Copyright (c) 1991 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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* Common definitions for interreflection routines. |
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* |
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* Include after ray.h |
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*/ |
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#ifndef _RAD_AMBIENT_H_ |
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#define _RAD_AMBIENT_H_ |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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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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* Normal and u-vector directions encoded using dircode.c |
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*/ |
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typedef struct ambrec { |
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struct ambrec *next; /* next in list */ |
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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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int32 ndir; /* encoded surface normal */ |
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int32 udir; /* u-vector direction */ |
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short 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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float rad[2]; /* anisotropic radii (rad[0] <= rad[1]) */ |
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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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float gpos[2]; /* (u,v) gradient wrt. position */ |
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float gdir[2]; /* (u,v) gradient wrt. direction */ |
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uint32 corral; /* potential light leak direction flags */ |
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} AMBVAL; /* ambient value */ |
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extern COLOR ambval; /* global ambient component */ |
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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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typedef struct ambtree { |
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AMBVAL *alist; /* ambient value list */ |
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struct ambtree *kid; /* 8 child nodes */ |
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} AMBTREE; /* ambient octree */ |
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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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#ifndef AVGREFL |
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#define AVGREFL 0.5 /* assumed average reflectance */ |
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#endif |
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#define AMBVALSIZ 75 /* number of bytes in portable AMBVAL struct */ |
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#define AMBMAGIC 357 /* magic number for ambient value files */ |
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#define AMBVALSIZ 67 /* number of bytes in portable AMBVAL struct */ |
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#define AMBMAGIC 559 /* magic number for ambient value files */ |
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#define AMBFMT "Radiance_ambval" /* format id string */ |
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/* defined in ambient.c */ |
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extern void setambres(int ar); |
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extern void setambacc(double newa); |
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extern void setambient(void); |
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extern void multambient(COLOR aval, RAY *r, FVECT nrm); |
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extern void ambdone(void); |
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extern void ambnotify(OBJECT obj); |
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extern int ambsync(void); |
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/* defined in ambcomp.c */ |
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extern int doambient(COLOR acol, RAY *r, double wt, |
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FVECT uv[2], float rad[2], |
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float gpos[2], float gdir[2], uint32 *crlp); |
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/* defined in ambio.c */ |
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extern void putambmagic(FILE *fp); |
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extern int hasambmagic(FILE *fp); |
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extern int writambval(AMBVAL *av, FILE *fp); |
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extern int readambval(AMBVAL *av, FILE *fp); |
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extern int ambvalOK(AMBVAL *av); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _RAD_AMBIENT_H_ */ |
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