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/* Copyright (c) 1986 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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* source.h - header file for ray tracing sources. |
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* |
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* 8/20/85 |
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* Include after ray.h |
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*/ |
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#ifndef _RAD_SOURCE_H_ |
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#define _RAD_SOURCE_H_ |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#include <string.h> |
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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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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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float flen; /* focal length (negative if distant source) */ |
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} SPOT; /* spotlight */ |
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typedef struct { |
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int sn; /* next source to aim for */ |
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} sv; /* virtual source */ |
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} sa; /* source aiming information */ |
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long ntests, nhits; /* shadow tests and hits */ |
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unsigned long |
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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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#define initsrcindex(s) ((s)->sn = (s)->sp = -1, (s)->np = 0) |
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#define clrpart(pt) bzero((char *)(pt), MAXSPART/2) |
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#define clrpart(pt) memset((char *)(pt), '\0', MAXSPART/2) |
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#define setpart(pt,i,v) ((pt)[(i)>>2] |= (v)<<(((i)&3)<<1)) |
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#define spart(pt,pi) ((pt)[(pi)>>2] >> (((pi)&3)<<1) & 3) |
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} VSMATERIAL; /* virtual source material functions */ |
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typedef struct { |
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int (*setsrc)(); /* set light source for object */ |
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int (*partit)(); /* partition light source object */ |
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void (*setsrc)(); /* set light source for object */ |
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void (*partit)(); /* partition light source object */ |
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double (*getpleq)(); /* plane equation for surface */ |
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double (*getdisk)(); /* maximum disk for surface */ |
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} SOBJECT; /* source object functions */ |
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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 int srcvalue(); /* compute source value w/o shadows */ |
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extern double nextssamp(); /* get next source sample location */ |
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extern double scylform(); /* cosine to axis of cylinder */ |
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#define sflatform(sn,dir) -DOT(source[sn].snorm, dir) |
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extern OBJREC *vsmaterial(); /* virtual source material */ |
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#define getplaneq(c,o) (*sfun[(o)->otype].of->getpleq)(c,o) |
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#define getmaxdisk(c,o) (*sfun[(o)->otype].of->getdisk)(c,o) |
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#define setsource(s,o) (*sfun[(o)->otype].of->setsrc)(s,o) |
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extern double intercircle(); /* intersect two circles */ |
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extern double spotdisk(); /* intersecting disk for spot */ |
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extern double beamdisk(); /* intersecting disk for beam */ |
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/* defined in source.c */ |
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extern void marksources(void); |
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extern void freesources(void); |
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extern int srcray(RAY *sr, RAY *r, SRCINDEX *si); |
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extern void srcvalue(RAY *r); |
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extern int sourcehit(RAY *r); |
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extern void direct(RAY *r, void (*f)(), char *p); |
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extern void srcscatter(RAY *r); |
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extern int m_light(OBJREC *m, RAY *r); |
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/* defined in srcsamp.c */ |
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extern double nextssamp(RAY *r, SRCINDEX *si); |
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extern int skipparts(int ct[3], int sz[3], int pp[2], unsigned char *pt); |
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extern void nopart(SRCINDEX *si, RAY *r); |
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extern void cylpart(SRCINDEX *si, RAY *r); |
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extern void flatpart(SRCINDEX *si, RAY *r); |
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extern double scylform(int sn, FVECT dir); |
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/* defined in srcsupp.c */ |
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extern void initstypes(void); |
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extern int newsource(void); |
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extern void setflatss(SRCREC *src); |
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extern void fsetsrc(SRCREC *src, OBJREC *so); |
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extern void ssetsrc(SRCREC *src, OBJREC *so); |
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extern void sphsetsrc(SRCREC *src, OBJREC *so); |
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extern void rsetsrc(SRCREC *src, OBJREC *so); |
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extern void cylsetsrc(SRCREC *src, OBJREC *so); |
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extern SPOT *makespot(OBJREC *m); |
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extern int spotout(RAY *r, SPOT *s); |
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extern double fgetmaxdisk(FVECT ocent, OBJREC *op); |
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extern double rgetmaxdisk(FVECT ocent, OBJREC *op); |
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extern double fgetplaneq(FVECT nvec, OBJREC *op); |
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extern double rgetplaneq(FVECT nvec, OBJREC *op); |
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extern int commonspot(SPOT *sp1, SPOT *sp2, FVECT org); |
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extern int commonbeam(SPOT *sp1, SPOT *sp2, FVECT org); |
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extern int checkspot(SPOT *sp, FVECT nrm); |
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extern double spotdisk(FVECT oc, OBJREC *op, SPOT *sp, FVECT pos); |
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extern double beamdisk(FVECT oc, OBJREC *op, SPOT *sp, FVECT dir); |
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extern double intercircle(FVECT cc, FVECT c1, FVECT c2, |
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double r1s, double r2s); |
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/* defined in virtuals.c */ |
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extern void markvirtuals(void); |
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extern void addvirtuals(int sn, int nr); |
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extern void vproject(OBJREC *o, int sn, int n); |
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extern OBJREC *vsmaterial(OBJREC *o); |
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extern int makevsrc(OBJREC *op, int sn, MAT4 pm); |
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extern double getdisk(FVECT oc, OBJREC *op, int sn); |
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extern int vstestvis(int f, OBJREC *o, FVECT oc, double or2, int sn); |
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extern void virtverb(int sn, FILE *fp); |
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extern SPOT *makespot(); /* make spotlight */ |
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extern double dstrsrc; /* source distribution amount */ |
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extern double shadthresh; /* relative shadow threshold */ |
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extern double shadcert; /* shadow testing certainty */ |
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extern double srcsizerat; /* max. ratio of source size/dist. */ |
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extern int directrelay; /* maximum number of source relays */ |
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extern int vspretest; /* virtual source pretest density */ |
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extern int directvis; /* sources visible? */ |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _RAD_SOURCE_H_ */ |
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#define getplaneq(c,o) (*sfun[(o)->otype].of->getpleq)(c,o) |
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#define getmaxdisk(c,o) (*sfun[(o)->otype].of->getdisk)(c,o) |
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#define setsource(s,o) (*sfun[(o)->otype].of->setsrc)(s,o) |
