| 1 |
/* Copyright (c) 1986 Regents of the University of California */ |
| 2 |
|
| 3 |
/* SCCSid "$SunId$ LBL" */ |
| 4 |
|
| 5 |
/* |
| 6 |
* ray.h - header file for routines using rays. |
| 7 |
* |
| 8 |
* 8/7/85 |
| 9 |
*/ |
| 10 |
|
| 11 |
#include "standard.h" |
| 12 |
|
| 13 |
#include "object.h" |
| 14 |
|
| 15 |
#include "color.h" |
| 16 |
|
| 17 |
/* ray type flags */ |
| 18 |
#define PRIMARY 01 /* original ray */ |
| 19 |
#define SHADOW 02 /* ray to light source */ |
| 20 |
#define REFLECTED 04 /* reflected ray */ |
| 21 |
#define REFRACTED 010 /* refracted (bent) ray */ |
| 22 |
#define TRANS 020 /* transmitted/transferred ray */ |
| 23 |
#define AMBIENT 040 /* ray scattered for interreflection */ |
| 24 |
|
| 25 |
/* reflected ray types */ |
| 26 |
#define RAYREFL (SHADOW|REFLECTED|AMBIENT) |
| 27 |
|
| 28 |
typedef struct ray { |
| 29 |
long rno; /* unique ray number */ |
| 30 |
int rlvl; /* number of reflections for this ray */ |
| 31 |
float rweight; /* cumulative weight of this ray */ |
| 32 |
short rtype; /* ray type */ |
| 33 |
short crtype; /* cumulative ray type */ |
| 34 |
struct ray *parent; /* ray this originated from */ |
| 35 |
FVECT rorg; /* origin of ray */ |
| 36 |
FVECT rdir; /* normalized direction of ray */ |
| 37 |
int rsrc; /* source we're aiming for */ |
| 38 |
OBJECT *clipset; /* set of objects currently clipped */ |
| 39 |
OBJECT *newcset; /* next clipset, used for transmission */ |
| 40 |
OBJREC *ro; /* intersected object */ |
| 41 |
double rot; /* distance to object */ |
| 42 |
FVECT rop; /* intersection point */ |
| 43 |
FVECT ron; /* intersection surface normal */ |
| 44 |
double rod; /* -DOT(rdir, ron) */ |
| 45 |
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 */ |
| 49 |
FVECT pert; /* surface normal perturbation */ |
| 50 |
COLOR pcol; /* pattern color */ |
| 51 |
COLOR rcol; /* returned ray value */ |
| 52 |
double rt; /* returned effective ray length */ |
| 53 |
} RAY; |
| 54 |
|
| 55 |
extern double raynormal(); |
