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/* RCSid $Id: ray.h,v 2.16 2003/05/09 22:18:03 greg Exp $ */ |
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/* |
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* ray.h - header file for routines using rays. |
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*/ |
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#ifndef _RAD_RAY_H_ |
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#define _RAD_RAY_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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#include "standard.h" |
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#include "octree.h" |
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#include "object.h" |
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#include "color.h" |
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#define MAXDIM 32 /* maximum number of dimensions */ |
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/* ray type flags */ |
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#define PRIMARY 01 /* original ray */ |
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#define SHADOW 02 /* ray to light source */ |
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#define REFLECTED 04 /* reflected ray */ |
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#define REFRACTED 010 /* refracted (bent) ray */ |
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#define TRANS 020 /* transmitted/transferred ray */ |
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#define AMBIENT 040 /* ray scattered for interreflection */ |
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#define SPECULAR 0100 /* ray scattered for specular */ |
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/* reflected ray types */ |
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#define RAYREFL (SHADOW|REFLECTED|AMBIENT|SPECULAR) |
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typedef struct ray { |
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unsigned long rno; /* unique ray number */ |
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int rlvl; /* number of reflections for this ray */ |
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float rweight; /* cumulative weight of this ray */ |
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short rtype; /* ray type */ |
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short crtype; /* cumulative ray type */ |
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struct ray *parent; /* ray this originated from */ |
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FVECT rorg; /* origin of ray */ |
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FVECT rdir; /* normalized direction of ray */ |
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double rmax; /* maximum distance (aft clipping plane) */ |
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int rsrc; /* source we're aiming for */ |
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OBJECT *clipset; /* set of objects currently clipped */ |
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OBJECT *newcset; /* next clipset, used for transmission */ |
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void (*revf)(); /* evaluation function for this ray */ |
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void (*hitf)(); /* custom hit test for this traversal */ |
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OBJECT robj; /* intersected object number */ |
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OBJREC *ro; /* intersected object (one with material) */ |
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double rot; /* distance to object */ |
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FVECT rop; /* intersection point */ |
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FVECT ron; /* intersection surface normal */ |
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double rod; /* -DOT(rdir, ron) */ |
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FULLXF *rox; /* object transformation */ |
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FLOAT uv[2]; /* local coordinates */ |
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FVECT pert; /* surface normal perturbation */ |
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COLOR pcol; /* pattern color */ |
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COLOR rcol; /* returned ray value */ |
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double rt; /* returned effective ray length */ |
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COLOR cext; /* medium extinction coefficient */ |
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COLOR albedo; /* medium scattering albedo */ |
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float gecc; /* scattering eccentricity coefficient */ |
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int *slights; /* list of lights to test for scattering */ |
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} RAY; |
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#define rayvalue(r) (*(r)->revf)(r) |
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extern char VersionID[]; /* Radiance version ID string */ |
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extern CUBE thescene; /* our scene */ |
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extern OBJECT nsceneobjs; /* number of objects in our scene */ |
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extern unsigned long raynum; /* next ray ID */ |
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extern unsigned long nrays; /* total rays traced so far */ |
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extern OBJREC Lamb; /* a Lambertian surface */ |
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extern OBJREC Aftplane; /* aft clipping object */ |
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extern void (*trace)(); /* global trace reporting callback */ |
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extern int dimlist[]; /* dimension list for distribution */ |
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extern int ndims; /* number of dimensions so far */ |
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extern int samplendx; /* index for this sample */ |
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extern int ray_savesiz; /* size of parameter save buffer */ |
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extern int do_irrad; /* compute irradiance? */ |
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extern double dstrsrc; /* square source distribution */ |
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extern double shadthresh; /* shadow threshold */ |
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extern double shadcert; /* shadow testing certainty */ |
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extern int directrelay; /* number of source relays */ |
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extern int vspretest; /* virtual source pretest density */ |
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extern int directvis; /* light sources visible to eye? */ |
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extern double srcsizerat; /* maximum source size/dist. ratio */ |
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extern double specthresh; /* specular sampling threshold */ |
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extern double specjitter; /* specular sampling jitter */ |
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extern COLOR cextinction; /* global extinction coefficient */ |
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extern COLOR salbedo; /* global scattering albedo */ |
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extern double seccg; /* global scattering eccentricity */ |
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extern double ssampdist; /* scatter sampling distance */ |
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extern int backvis; /* back face visibility */ |
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extern int maxdepth; /* maximum recursion depth */ |
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extern double minweight; /* minimum ray weight */ |
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extern char *ambfile; /* ambient file name */ |
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extern COLOR ambval; /* ambient value */ |
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extern int ambvwt; /* initial weight for ambient value */ |
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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; /* ambient divisions */ |
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extern int ambssamp; /* ambient super-samples */ |
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extern int ambounce; /* 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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extern int ray_pnprocs; /* number of child processes */ |
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extern int ray_pnidle; /* number of idle processes */ |
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#define AMBLLEN 128 /* max. ambient list length */ |
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#define AMBWORD 8 /* average word length */ |
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typedef struct { /* rendering parameter holder */ |
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int do_irrad; |
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double dstrsrc; |
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double shadthresh; |
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double shadcert; |
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int directrelay; |
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int vspretest; |
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int directvis; |
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double srcsizerat; |
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COLOR cextinction; |
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COLOR salbedo; |
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double seccg; |
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double ssampdist; |
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double specthresh; |
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double specjitter; |
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int backvis; |
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int maxdepth; |
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double minweight; |
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char ambfile[512]; |
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COLOR ambval; |
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int ambvwt; |
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double ambacc; |
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int ambres; |
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int ambdiv; |
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int ambssamp; |
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int ambounce; |
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int ambincl; |
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short amblndx[AMBLLEN+1]; |
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char amblval[AMBLLEN*AMBWORD]; |
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} RAYPARAMS; |
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#define rpambmod(p,i) ( (i)>=AMBLLEN||(p)->amblndx[i]<0 ? \ |
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(char *)NULL : (p)->amblval+(p)->amblndx[i] ) |
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/* defined in duphead.c */ |
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extern void headclean(void); |
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extern void openheader(void); |
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extern void dupheader(void); |
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extern void pfdetach(void); |
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extern void pfclean(void); |
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extern void pflock(int lf); |
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extern void pfhold(void); |
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extern void io_process(void); |
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/* defined in freeobjmem.c */ |
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extern int free_objs(OBJECT on, OBJECT no); |
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extern void free_objmem(void); |
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/* defined in preload.c */ |
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extern int load_os(OBJREC *op); |
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extern void preload_objs(void); |
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/* defined in raycalls.c */ |
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extern void ray_init(char *otnm); |
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extern void ray_trace(RAY *r); |
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extern void ray_done(int freall); |
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extern void ray_save(RAYPARAMS *rp); |
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extern void ray_restore(RAYPARAMS *rp); |
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extern void ray_defaults(RAYPARAMS *rp); |
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/* defined in raypcalls.c */ |
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extern void ray_pinit(char *otnm, int nproc); |
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extern void ray_psend(RAY *r); |
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extern int ray_pqueue(RAY *r); |
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extern int ray_presult(RAY *r, int poll); |
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extern void ray_pdone(int freall); |
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extern void ray_popen(int nadd); |
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extern void ray_pclose(int nsub); |
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/* defined in raytrace.c */ |
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extern int rayorigin(RAY *r, RAY *ro, int rt, double rw); |
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extern void rayclear(RAY *r); |
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extern void raytrace(RAY *r); |
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extern void rayhit(OBJECT *oset, RAY *r); |
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extern void raycont(RAY *r); |
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extern void raytrans(RAY *r); |
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extern int rayshade(RAY *r, int mod); |
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extern void rayparticipate(RAY *r); |
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extern void raytexture(RAY *r, OBJECT mod); |
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extern int raymixture(RAY *r, OBJECT fore, OBJECT back, double coef); |
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extern double raydist(RAY *r, int flags); |
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extern double raynormal(FVECT norm, RAY *r); |
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extern void newrayxf(RAY *r); |
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extern void flipsurface(RAY *r); |
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extern int localhit(RAY *r, CUBE *scene); |
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/* defined in renderopts.c */ |
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extern int getrenderopt(int ac, char *av[]); |
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extern void print_rdefaults(void); |
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/* defined in srcdraw.c */ |
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extern void drawsources(COLOR *pic[], float *zbf[], |
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int x0, int xsiz, int y0, int ysiz); |
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/* module main procedures */ |
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extern void rtrace(char *fname); |
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extern void rview(void); |
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extern void rpict(int seq, char *pout, char *zout, char *prvr); |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _RAD_RAY_H_ */ |
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