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root/radiance/ray/src/rt/ambient.h
Revision: 2.10
Committed: Fri Jun 27 06:53:22 2003 UTC (20 years, 9 months ago) by greg
Content type: text/plain
Branch: MAIN
CVS Tags: rad3R6, rad3R6P1
Changes since 2.9: +1 -4 lines
Log Message:
Broke standard.h into rtio.h, rterror.h, rtmath.h, and rtmisc.h

File Contents

# Content
1 /* RCSid $Id: ambient.h,v 2.9 2003/06/07 00:54:58 schorsch Exp $ */
2 /*
3 * Common definitions for interreflection routines.
4 *
5 * Include after ray.h
6 */
7 #ifndef _RAD_AMBIENT_H_
8 #define _RAD_AMBIENT_H_
9 #ifdef __cplusplus
10 extern "C" {
11 #endif
12
13 /*
14 * Since we've defined our vectors as float below to save space,
15 * watch out for changes in the definitions of VCOPY() and DOT()
16 * and don't pass these vectors to fvect routines.
17 */
18 typedef struct ambrec {
19 unsigned long latick; /* last accessed tick */
20 float pos[3]; /* position in space */
21 float dir[3]; /* normal direction */
22 int lvl; /* recursion level of parent ray */
23 float weight; /* weight of parent ray */
24 float rad; /* validity radius */
25 COLOR val; /* computed ambient value */
26 float gpos[3]; /* gradient wrt. position */
27 float gdir[3]; /* gradient wrt. direction */
28 struct ambrec *next; /* next in list */
29 } AMBVAL; /* ambient value */
30
31 typedef struct ambtree {
32 AMBVAL *alist; /* ambient value list */
33 struct ambtree *kid; /* 8 child nodes */
34 } AMBTREE; /* ambient octree */
35
36 typedef struct {
37 short t, p; /* theta, phi indices */
38 COLOR v; /* value sum */
39 float r; /* 1/distance sum */
40 float k; /* variance for this division */
41 int n; /* number of subsamples */
42 } AMBSAMP; /* ambient sample division */
43
44 typedef struct {
45 FVECT ux, uy, uz; /* x, y and z axis directions */
46 short nt, np; /* number of theta and phi directions */
47 } AMBHEMI; /* ambient sample hemisphere */
48
49 extern double maxarad; /* maximum ambient radius */
50 extern double minarad; /* minimum ambient radius */
51
52 #define AVGREFL 0.5 /* assumed average reflectance */
53
54 #define AMBVALSIZ 75 /* number of bytes in portable AMBVAL struct */
55 #define AMBMAGIC 557 /* magic number for ambient value files */
56 #define AMBFMT "Radiance_ambval" /* format id string */
57
58 /* defined in ambcomp.c */
59 extern int divsample(AMBSAMP *dp, AMBHEMI *h, RAY *r);
60 extern double doambient(COLOR acol, RAY *r, double wt, FVECT pg, FVECT dg);
61 extern void inithemi(AMBHEMI *hp, RAY *r, double wt);
62 extern void comperrs(AMBSAMP *da, AMBHEMI *hp);
63 extern void posgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp);
64 extern void dirgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp);
65 /* defined in ambient.c */
66 extern void setambres(int ar);
67 extern void setambacc(double newa);
68 extern void setambient(void);
69 extern void ambdone(void);
70 extern void ambnotify(OBJECT obj);
71 extern void ambient(COLOR acol, RAY *r, FVECT nrm);
72 extern double sumambient(COLOR acol, RAY *r, FVECT rn, int al,
73 AMBTREE *at, FVECT c0, double s);
74 extern double makeambient(COLOR acol, RAY *r, FVECT rn, int al);
75 extern void extambient(COLOR cr, AMBVAL *ap, FVECT pv, FVECT nv);
76 extern int ambsync(void);
77 /* defined in ambio.c */
78 extern void putambmagic(FILE *fp);
79 extern int hasambmagic(FILE *fp);
80 extern int writambval(AMBVAL *av, FILE *fp);
81 extern int ambvalOK(AMBVAL *av);
82 extern int readambval(AMBVAL *av, FILE *fp);
83 /* defined in lookamb.c */
84 extern void lookamb(FILE *fp);
85 extern void writamb(FILE *fp);
86
87
88 #ifdef __cplusplus
89 }
90 #endif
91 #endif /* _RAD_AMBIENT_H_ */
92