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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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#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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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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|
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#define MAXDIM 32 /* maximum number of dimensions */ |
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/* ray type flags */ |
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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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float rweight; /* cumulative weight (for termination) */ |
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COLOR rcoef; /* contribution coefficient w.r.t. parent */ |
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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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const 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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void (*revf)(struct ray *); /* ray evaluation function */ |
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void (*hitf)(OBJECT *, struct ray *); /* custom hit test */ |
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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 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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RREAL 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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COLOR rcol; /* returned radiance 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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extern int do_irrad; /* compute irradiance? */ |
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extern int rand_samp; /* pure Monte Carlo sampling? */ |
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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 ray_pnprocs; /* number of child processes */ |
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extern int ray_pnidle; /* number of idle processes */ |
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|
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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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#ifndef AMBLLEN |
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#define AMBLLEN 512 /* max. ambient list length */ |
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#endif |
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#define AMBWORD 12 /* average word length */ |
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typedef struct { /* rendering parameter holder */ |
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int do_irrad; |
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int rand_samp; |
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double dstrsrc; |
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double shadthresh; |
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double shadcert; |
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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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#ifdef NOPROTO |
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extern void headclean(); |
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extern void openheader(); |
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extern void dupheader(); |
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extern void pfdetach(); |
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extern void pfclean(); |
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extern void pflock(); |
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extern void pfhold(); |
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extern void io_process(); |
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extern int free_objs(); |
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extern void free_objmem(); |
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extern int load_os(); |
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extern void preload_objs(); |
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extern void ray_init(); |
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extern void ray_trace(); |
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extern void ray_done(); |
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extern void ray_save(); |
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extern void ray_restore(); |
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extern void ray_defaults(); |
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extern void ray_pinit(); |
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extern void ray_psend(); |
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extern int ray_pqueue(); |
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extern int ray_presult(); |
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extern void ray_pdone(); |
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extern void ray_popen(); |
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extern void ray_pclose(); |
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extern int rayorigin(); |
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extern void rayclear(); |
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extern void raytrace(); |
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extern void rayhit(); |
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extern void raycont(); |
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extern void raytrans(); |
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extern int rayshade(); |
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extern void rayparticipate(); |
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extern int raymixture(); |
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extern double raydist(); |
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extern double raynormal(); |
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extern void newrayxf(); |
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extern void flipsurface(); |
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extern int localhit(); |
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extern int getrenderopt(); |
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extern void print_rdefaults(); |
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extern void drawsources(); |
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extern void rtrace(); |
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extern void rview(); |
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extern void rpict(); |
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#else |
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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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/* defined in persist.c */ |
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extern void persistfile(char *pfn); |
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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 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 int rayorigin(RAY *r, int rt, const RAY *ro, const COLOR rc); |
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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 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 void raycontrib(COLOR rc, const RAY *r, int flags); |
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extern double raydist(const 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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/* 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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extern void init_drawsources(int rad); |
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/* defined in rt/initotypes.c */ |
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extern void initotypes(void); |
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/* module main procedures */ |
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extern void rtrace(char *fname); |
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extern char * formstr(int f); |
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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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