| 1 |
< |
/* Copyright (c) 1986 Regents of the University of California */ |
| 1 |
> |
/* Copyright (c) 1995 Regents of the University of California */ |
| 2 |
|
|
| 3 |
|
/* SCCSid "$SunId$ LBL" */ |
| 4 |
|
|
| 14 |
|
|
| 15 |
|
#include "color.h" |
| 16 |
|
|
| 17 |
+ |
#define MAXDIM 32 /* maximum number of dimensions */ |
| 18 |
+ |
|
| 19 |
|
/* ray type flags */ |
| 20 |
|
#define PRIMARY 01 /* original ray */ |
| 21 |
|
#define SHADOW 02 /* ray to light source */ |
| 23 |
|
#define REFRACTED 010 /* refracted (bent) ray */ |
| 24 |
|
#define TRANS 020 /* transmitted/transferred ray */ |
| 25 |
|
#define AMBIENT 040 /* ray scattered for interreflection */ |
| 26 |
+ |
#define SPECULAR 0100 /* ray scattered for specular */ |
| 27 |
|
|
| 28 |
|
/* reflected ray types */ |
| 29 |
< |
#define RAYREFL (SHADOW|REFLECTED|AMBIENT) |
| 29 |
> |
#define RAYREFL (SHADOW|REFLECTED|AMBIENT|SPECULAR) |
| 30 |
|
|
| 31 |
|
typedef struct ray { |
| 32 |
< |
long rno; /* unique ray number */ |
| 32 |
> |
unsigned long rno; /* unique ray number */ |
| 33 |
|
int rlvl; /* number of reflections for this ray */ |
| 34 |
|
float rweight; /* cumulative weight of this ray */ |
| 35 |
|
short rtype; /* ray type */ |
| 37 |
|
struct ray *parent; /* ray this originated from */ |
| 38 |
|
FVECT rorg; /* origin of ray */ |
| 39 |
|
FVECT rdir; /* normalized direction of ray */ |
| 40 |
+ |
double rmax; /* maximum distance (aft clipping plane) */ |
| 41 |
|
int rsrc; /* source we're aiming for */ |
| 42 |
|
OBJECT *clipset; /* set of objects currently clipped */ |
| 43 |
|
OBJECT *newcset; /* next clipset, used for transmission */ |
| 44 |
< |
OBJREC *ro; /* intersected object */ |
| 44 |
> |
int (*revf)(); /* evaluation function for this ray */ |
| 45 |
> |
OBJECT robj; /* object number from octree */ |
| 46 |
> |
OBJREC *ro; /* intersected object (for material) */ |
| 47 |
|
double rot; /* distance to object */ |
| 48 |
|
FVECT rop; /* intersection point */ |
| 49 |
|
FVECT ron; /* intersection surface normal */ |
| 50 |
|
double rod; /* -DOT(rdir, ron) */ |
| 51 |
< |
double rofx[4][4]; /* transform from object space */ |
| 46 |
< |
double rofs; /* scaling factor from object */ |
| 47 |
< |
double robx[4][4]; /* transform back to object space */ |
| 48 |
< |
double robs; /* back scaling factor */ |
| 51 |
> |
FULLXF *rox; /* object transformation */ |
| 52 |
|
FVECT pert; /* surface normal perturbation */ |
| 53 |
|
COLOR pcol; /* pattern color */ |
| 54 |
|
COLOR rcol; /* returned ray value */ |
| 55 |
|
double rt; /* returned effective ray length */ |
| 56 |
+ |
COLOR cext; /* medium extinction coefficient */ |
| 57 |
+ |
COLOR albedo; /* medium scattering albedo */ |
| 58 |
+ |
float gecc; /* scattering eccentricity coefficient */ |
| 59 |
+ |
int *slights; /* list of lights to test for scattering */ |
| 60 |
|
} RAY; |
| 61 |
|
|
| 62 |
+ |
extern int raytrace(); |
| 63 |
+ |
|
| 64 |
|
extern double raynormal(); |
| 65 |
+ |
|
| 66 |
+ |
extern double raydist(); |
| 67 |
+ |
|
| 68 |
+ |
extern int dimlist[]; /* dimension list for distribution */ |
| 69 |
+ |
extern int ndims; /* number of dimensions so far */ |
| 70 |
+ |
extern int samplendx; /* index for this sample */ |
| 71 |
+ |
|
| 72 |
+ |
#define rayvalue(r) (*(r)->revf)(r) |
