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greg |
2.2 |
/* Copyright (c) 1992 Regents of the University of California */
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greg |
1.1 |
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/* SCCSid "$SunId$ LBL" */
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/*
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* ray.h - header file for routines using rays.
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*
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* 8/7/85
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*/
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#include "standard.h"
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#include "object.h"
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#include "color.h"
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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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greg |
2.2 |
#define SPECULAR 0100 /* ray scattered for specular */
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greg |
1.1 |
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/* reflected ray types */
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greg |
2.2 |
#define RAYREFL (SHADOW|REFLECTED|AMBIENT|SPECULAR)
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greg |
1.1 |
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typedef struct ray {
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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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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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greg |
1.6 |
int (*revf)(); /* evaluation function for this ray */
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greg |
1.1 |
OBJREC *ro; /* intersected object */
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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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greg |
1.4 |
FULLXF *rox; /* object transformation */
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greg |
1.1 |
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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greg |
1.3 |
double rt; /* returned effective ray length */
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greg |
1.1 |
} RAY;
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greg |
1.6 |
extern int raytrace();
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greg |
1.1 |
extern double raynormal();
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greg |
1.5 |
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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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greg |
2.2 |
#define MAXDIM 32 /* maximum number of dimensions */
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greg |
1.6 |
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#define rayvalue(r) (*(r)->revf)(r)
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