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/* RCSid $Id: ambient.h,v 2.8 2003/02/25 02:47:22 greg Exp $ */ |
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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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#include "copyright.h" |
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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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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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typedef struct { |
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short t, p; /* theta, phi indices */ |
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COLOR v; /* value sum */ |
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float r; /* 1/distance sum */ |
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float k; /* variance for this division */ |
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int n; /* number of subsamples */ |
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} AMBSAMP; /* ambient sample division */ |
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|
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typedef struct { |
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FVECT ux, uy, uz; /* x, y and z axis directions */ |
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short nt, np; /* number of theta and phi directions */ |
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} AMBHEMI; /* ambient sample hemisphere */ |
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extern double maxarad; /* maximum ambient radius */ |
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extern double minarad; /* minimum ambient radius */ |
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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 */ |
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|
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/* defined in ambcomp.c */ |
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extern int divsample(AMBSAMP *dp, AMBHEMI *h, RAY *r); |
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extern double doambient(COLOR acol, RAY *r, double wt, FVECT pg, FVECT dg); |
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extern void inithemi(AMBHEMI *hp, RAY *r, double wt); |
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extern void comperrs(AMBSAMP *da, AMBHEMI *hp); |
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extern void posgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp); |
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extern void dirgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp); |
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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 ambdone(void); |
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extern void ambnotify(OBJECT obj); |
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extern void ambient(COLOR acol, RAY *r, FVECT nrm); |
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extern double sumambient(COLOR acol, RAY *r, FVECT rn, int al, |
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AMBTREE *at, FVECT c0, double s); |
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extern double makeambient(COLOR acol, RAY *r, FVECT rn, int al); |
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extern void extambient(COLOR cr, AMBVAL *ap, FVECT pv, FVECT nv); |
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extern int ambsync(void); |
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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 ambvalOK(AMBVAL *av); |
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extern int readambval(AMBVAL *av, FILE *fp); |
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/* defined in lookamb.c */ |
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extern void lookamb(FILE *fp); |
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extern void writamb(FILE *fp); |
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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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