| 1 |
/* Copyright (c) 1991 Regents of the University of California */ |
| 2 |
|
| 3 |
/* SCCSid "$SunId$ LBL" */ |
| 4 |
|
| 5 |
/* |
| 6 |
* Common definitions for interreflection routines. |
| 7 |
*/ |
| 8 |
|
| 9 |
/* |
| 10 |
* Since we've defined our vectors as float below to save space, |
| 11 |
* watch out for changes in the definitions of VCOPY() and DOT() |
| 12 |
* and don't pass these vectors to fvect routines. |
| 13 |
*/ |
| 14 |
typedef struct ambrec { |
| 15 |
float pos[3]; /* position in space */ |
| 16 |
float dir[3]; /* normal direction */ |
| 17 |
int lvl; /* recursion level of parent ray */ |
| 18 |
float weight; /* weight of parent ray */ |
| 19 |
float rad; /* validity radius */ |
| 20 |
COLOR val; /* computed ambient value */ |
| 21 |
float gpos[3]; /* gradient wrt. position */ |
| 22 |
float gdir[3]; /* gradient wrt. direction */ |
| 23 |
struct ambrec *next; /* next in list */ |
| 24 |
} AMBVAL; /* ambient value */ |
| 25 |
|
| 26 |
extern COLOR ambval; /* global ambient component */ |
| 27 |
extern double ambacc; /* ambient accuracy */ |
| 28 |
extern int ambres; /* ambient resolution */ |
| 29 |
extern int ambdiv; /* number of divisions for calculation */ |
| 30 |
extern int ambssamp; /* number of super-samples */ |
| 31 |
extern int ambounce; /* number of ambient bounces */ |
| 32 |
extern char *amblist[]; /* ambient include/exclude list */ |
| 33 |
extern int ambincl; /* include == 1, exclude == 0 */ |
| 34 |
extern double maxarad; /* maximum ambient radius */ |
| 35 |
extern double minarad; /* minimum ambient radius */ |
| 36 |
|
| 37 |
extern double sumambient(), doambient(), makeambient(); |
