--- ray/src/rt/ambient.h 1992/07/16 12:08:46 2.3 +++ ray/src/rt/ambient.h 2014/04/11 22:54:34 2.20 @@ -1,43 +1,163 @@ -/* Copyright (c) 1991 Regents of the University of California */ +/* RCSid $Id: ambient.h,v 2.20 2014/04/11 22:54:34 greg Exp $ */ +/* + * Common definitions for interreflection routines. + * + * Include after ray.h + */ -/* SCCSid "$SunId$ LBL" */ +#ifndef _RAD_AMBIENT_H_ +#define _RAD_AMBIENT_H_ +#ifdef __cplusplus +extern "C" { +#endif +#ifdef NEWAMB + /* - * Common definitions for interreflection routines. + * Normal and u-vector directions encoded using dircode.c */ +typedef struct ambrec { + struct ambrec *next; /* next in list */ + unsigned long latick; /* last accessed tick */ + float pos[3]; /* position in space */ + int32 ndir; /* encoded surface normal */ + int32 udir; /* u-vector direction */ + int lvl; /* recursion level of parent ray */ + float weight; /* weight of parent ray */ + float rad[2]; /* anisotropic radii (rad[0] <= rad[1]) */ + COLOR val; /* computed ambient value */ + float gpos[2]; /* (u,v) gradient wrt. position */ + float gdir[2]; /* (u,v) gradient wrt. direction */ +} AMBVAL; /* ambient value */ +typedef struct ambtree { + AMBVAL *alist; /* ambient value list */ + struct ambtree *kid; /* 8 child nodes */ +} AMBTREE; /* ambient octree */ + +typedef struct { + COLOR v; /* division sum (partial) */ + float r; /* 1/distance sum */ + float k; /* variance for this division */ + int n; /* number of subsamples */ + unsigned short t, p; /* theta, phi indices */ +} AMBSAMP; /* ambient sample division */ + +typedef struct { + FVECT ux, uy, uz; /* x, y and z axis directions */ + COLOR acoef; /* division contribution coefficient */ + int ns; /* number of super-samples */ + int nt, np; /* number of theta and phi directions */ +} AMBHEMI; /* ambient sample hemisphere */ + +extern double maxarad; /* maximum ambient radius */ +extern double minarad; /* minimum ambient radius */ + +#ifndef AVGREFL +#define AVGREFL 0.5 /* assumed average reflectance */ +#endif + +#define AMBVALSIZ 63 /* number of bytes in portable AMBVAL struct */ +#define AMBMAGIC 558 /* magic number for ambient value files */ +#define AMBFMT "Radiance_ambval" /* format id string */ + + /* defined in ambient.c */ +extern void setambres(int ar); +extern void setambacc(double newa); +extern void setambient(void); +extern void multambient(COLOR aval, RAY *r, FVECT nrm); +extern void ambdone(void); +extern void ambnotify(OBJECT obj); +extern int ambsync(void); + /* defined in ambcomp.c */ +extern int doambient(COLOR acol, RAY *r, double wt, + FVECT uv[2], float rad[2], + float gpos[2], float gdir[2]); + /* defined in ambio.c */ +extern void putambmagic(FILE *fp); +extern int hasambmagic(FILE *fp); +extern int writambval(AMBVAL *av, FILE *fp); +extern int readambval(AMBVAL *av, FILE *fp); +extern int ambvalOK(AMBVAL *av); + +#else /* ! NEWAMB */ + /* * Since we've defined our vectors as float below to save space, * watch out for changes in the definitions of VCOPY() and DOT() * and don't pass these vectors to fvect routines. */ typedef struct ambrec { + struct ambrec *next; /* next in list */ + unsigned long latick; /* last accessed tick */ float pos[3]; /* position in space */ float dir[3]; /* normal direction */ - int lvl; /* recursion level of parent ray */ + int lvl; /* recursion level of parent ray */ float weight; /* weight of parent ray */ float rad; /* validity radius */ COLOR val; /* computed ambient value */ float gpos[3]; /* gradient wrt. position */ float gdir[3]; /* gradient wrt. direction */ - struct ambrec *next; /* next in list */ } AMBVAL; /* ambient value */ -extern COLOR ambval; /* global ambient component */ -extern double ambacc; /* ambient accuracy */ -extern int ambres; /* ambient resolution */ -extern int ambdiv; /* number of divisions for calculation */ -extern int ambssamp; /* number of super-samples */ -extern int ambounce; /* number of ambient bounces */ -extern char *amblist[]; /* ambient include/exclude list */ -extern int ambincl; /* include == 1, exclude == 0 */ +typedef struct ambtree { + AMBVAL *alist; /* ambient value list */ + struct ambtree *kid; /* 8 child nodes */ +} AMBTREE; /* ambient octree */ + +typedef struct { + COLOR v; /* division sum (partial) */ + float r; /* 1/distance sum */ + float k; /* variance for this division */ + int n; /* number of subsamples */ + unsigned short t, p; /* theta, phi indices */ +} AMBSAMP; /* ambient sample division */ + +typedef struct { + FVECT ux, uy, uz; /* x, y and z axis directions */ + COLOR acoef; /* division contribution coefficient */ + int ns; /* number of super-samples */ + int nt, np; /* number of theta and phi directions */ +} AMBHEMI; /* ambient sample hemisphere */ + extern double maxarad; /* maximum ambient radius */ extern double minarad; /* minimum ambient radius */ -extern double sumambient(), doambient(), makeambient(); - +#ifndef AVGREFL #define AVGREFL 0.5 /* assumed average reflectance */ +#endif #define AMBVALSIZ 75 /* number of bytes in portable AMBVAL struct */ -#define AMBMAGIC 357 /* magic number for ambient value files */ +#define AMBMAGIC 557 /* magic number for ambient value files */ #define AMBFMT "Radiance_ambval" /* format id string */ + + /* defined in ambient.c */ +extern void setambres(int ar); +extern void setambacc(double newa); +extern void setambient(void); +extern void multambient(COLOR aval, RAY *r, FVECT nrm); +extern void ambdone(void); +extern void ambnotify(OBJECT obj); +extern int ambsync(void); + /* defined in ambcomp.c */ +extern double doambient(COLOR acol, RAY *r, double wt, + FVECT pg, FVECT dg); +extern void inithemi(AMBHEMI *hp, COLOR ac, RAY *r, double wt); +extern int divsample(AMBSAMP *dp, AMBHEMI *h, RAY *r); +extern void comperrs(AMBSAMP *da, AMBHEMI *hp); +extern void posgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp); +extern void dirgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp); + /* defined in ambio.c */ +extern void putambmagic(FILE *fp); +extern int hasambmagic(FILE *fp); +extern int writambval(AMBVAL *av, FILE *fp); +extern int ambvalOK(AMBVAL *av); +extern int readambval(AMBVAL *av, FILE *fp); + +#endif /* ! NEWAMB */ + +#ifdef __cplusplus +} +#endif +#endif /* _RAD_AMBIENT_H_ */ +