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root/radiance/ray/src/util/glare.h
Revision: 1.8
Committed: Wed Mar 20 11:56:42 1991 UTC (33 years ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 1.7: +5 -0 lines
Log Message:
added routines to absorb too-small glare sources

File Contents

# Content
1 /* Copyright (c) 1991 Regents of the University of California */
2
3 /* SCCSid "$SunId$ LBL" */
4
5 /*
6 * Common data structures for glare source finding routines
7 */
8
9 #include "standard.h"
10 #include "view.h"
11 #include "color.h"
12 #include "setscan.h"
13
14 #define GLAREBR 10.0 /* glare source is this * avg. lum. */
15
16 #define SAMPDENS 50 /* default samples per unit in image */
17 #define TSAMPSTEP 10 /* sample step to compute threshold */
18
19 #define SEPS 2 /* sources this close ==> contig. */
20
21 #define SAMIN .005 /* minimum solid angle for source */
22 #define MAXBUDDY (4.*sqrt(SAMIN/PI)) /* max separation for pairing */
23
24 #define TOOSMALL(s) ((s)->brt*(s)->dom < threshold*SAMIN)
25
26 extern VIEW ourview; /* our view */
27 extern VIEW pictview; /* picture view */
28 extern VIEW leftview, rightview; /* leftmost and rightmost views */
29
30 extern int verbose; /* verbose reporting */
31 extern char *progname; /* global argv[0] */
32
33 extern double threshold; /* threshold value for glare sources */
34
35 extern int sampdens; /* sample density */
36 extern ANGLE glarang[]; /* glare calculation angles */
37 extern int nglarangs;
38 extern double maxtheta; /* maximum glare angle (in radians) */
39 extern int hsize; /* horizontal size */
40 extern int hlim; /* horizontal limit of central view */
41
42 #define nglardirs (2*nglarangs+1)
43 #define vsize (sampdens-1)
44 #define h_theta(h) (-(double)(h)/(double)sampdens)
45
46 extern struct illum {
47 float theta; /* glare direction */
48 float lcos, lsin; /* cosine and sine to left view */
49 float rcos, rsin; /* cosine and sine to right view */
50 double sum; /* sum of indirect luminances */
51 int n; /* number of values in sum */
52 } *indirect; /* array of indirect illuminances */
53
54 struct srcspan {
55 short v; /* vertical position */
56 short l, r; /* left and right horizontal limits */
57 float brsum; /* sum of brightnesses for this span */
58 struct srcspan *next; /* next source span in list */
59 };
60
61 extern struct source {
62 FVECT dir; /* source direction */
63 double dom; /* solid angle of source */
64 double brt; /* average source brightness */
65 struct srcspan *first; /* first span for this source */
66 struct source *next; /* next source in list */
67 } *donelist; /* finished sources */
68
69 extern double getviewpix();