1 |
greg |
1.1 |
/* Copyright (c) 1991 Regents of the University of California */ |
2 |
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3 |
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#ifndef lint |
4 |
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static char SCCSid[] = "$SunId$ LBL"; |
5 |
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#endif |
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7 |
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/* |
8 |
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* Find glare sources in a scene or image. |
9 |
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* |
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* Greg Ward March 1991 |
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*/ |
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13 |
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#include "glare.h" |
14 |
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|
15 |
greg |
1.25 |
#define FEQ(a,b) ((a)-(b)<=FTINY&&(b)-(a)<=FTINY) |
16 |
greg |
1.1 |
#define VEQ(v1,v2) (FEQ((v1)[0],(v2)[0])&&FEQ((v1)[1],(v2)[1]) \ |
17 |
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&&FEQ((v1)[2],(v2)[2])) |
18 |
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|
19 |
greg |
1.24 |
char *rtargv[32] = {"rtrace", "-h-", "-ov", "-fff"}; |
20 |
greg |
1.1 |
int rtargc = 4; |
21 |
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|
22 |
greg |
1.6 |
VIEW ourview = STDVIEW; /* our view */ |
23 |
greg |
1.1 |
VIEW pictview = STDVIEW; /* picture view */ |
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VIEW leftview, rightview; /* leftmost and rightmost views */ |
25 |
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26 |
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char *picture = NULL; /* picture file name */ |
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char *octree = NULL; /* octree file name */ |
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29 |
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int verbose = 0; /* verbose reporting */ |
30 |
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char *progname; /* global argv[0] */ |
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32 |
greg |
1.8 |
double threshold = 0.; /* glare threshold */ |
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34 |
greg |
1.4 |
int sampdens = SAMPDENS; /* sample density */ |
35 |
greg |
1.1 |
ANGLE glarang[180] = {AEND}; /* glare calculation angles */ |
36 |
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int nglarangs = 0; |
37 |
greg |
1.2 |
double maxtheta; /* maximum angle (in radians) */ |
38 |
greg |
1.1 |
int hsize; /* horizontal size */ |
39 |
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|
40 |
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struct illum *indirect; /* array of indirect illuminances */ |
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|
42 |
greg |
1.13 |
long npixinvw; /* number of pixels in view */ |
43 |
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long npixmiss; /* number of pixels missed */ |
44 |
greg |
1.1 |
|
45 |
greg |
1.13 |
|
46 |
greg |
1.1 |
main(argc, argv) |
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int argc; |
48 |
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char *argv[]; |
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{ |
50 |
greg |
1.16 |
int combine = 1; |
51 |
greg |
1.1 |
int gotview = 0; |
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int rval, i; |
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char *err; |
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55 |
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progname = argv[0]; |
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/* process options */ |
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for (i = 1; i < argc && argv[i][0] == '-'; i++) { |
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rval = getviewopt(&ourview, argc-i, argv+i); |
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if (rval >= 0) { |
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i += rval; |
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gotview++; |
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continue; |
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} |
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switch (argv[i][1]) { |
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greg |
1.8 |
case 't': |
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threshold = atof(argv[++i]); |
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break; |
68 |
greg |
1.4 |
case 'r': |
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sampdens = atoi(argv[++i])/2; |
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break; |
71 |
greg |
1.1 |
case 'v': |
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if (argv[i][2] == '\0') { |
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verbose++; |
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break; |
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} |
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if (argv[i][2] != 'f') |
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goto userr; |
78 |
greg |
2.3 |
rval = viewfile(argv[++i], &ourview, NULL); |
79 |
greg |
1.1 |
if (rval < 0) { |
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fprintf(stderr, |
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"%s: cannot open view file \"%s\"\n", |
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progname, argv[i]); |
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exit(1); |
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} else if (rval == 0) { |
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fprintf(stderr, |
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"%s: bad view file \"%s\"\n", |
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progname, argv[i]); |
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exit(1); |
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} else |
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gotview++; |
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break; |
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case 'g': |
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if (argv[i][2] != 'a') |
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goto userr; |
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if (setscan(glarang, argv[++i]) < 0) { |
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fprintf(stderr, "%s: bad angle spec \"%s\"\n", |
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progname, argv[i]); |
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exit(1); |
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} |
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break; |
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case 'p': |
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picture = argv[++i]; |
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break; |
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greg |
1.16 |
case 'c': |
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combine = !combine; |
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break; |
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greg |
1.1 |
case 'd': |
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case 'l': |
109 |
greg |
2.2 |
case 's': |
110 |
greg |
1.1 |
rtargv[rtargc++] = argv[i]; |
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rtargv[rtargc++] = argv[++i]; |
112 |
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break; |
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case 'a': |
114 |
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rtargv[rtargc++] = argv[i]; |
115 |
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if (argv[i][2] == 'v') { |
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rtargv[rtargc++] = argv[++i]; |
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rtargv[rtargc++] = argv[++i]; |
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} |
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rtargv[rtargc++] = argv[++i]; |
120 |
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break; |
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default: |
122 |
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goto userr; |
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} |
124 |
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} |
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/* get octree */ |
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if (i < argc-1) |
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goto userr; |
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if (i == argc-1) { |
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rtargv[rtargc++] = octree = argv[i]; |
130 |
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rtargv[rtargc] = NULL; |
131 |
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} |
132 |
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/* get view */ |
133 |
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if (picture != NULL) { |
134 |
greg |
2.3 |
rval = viewfile(picture, &pictview, NULL); |
135 |
greg |
1.1 |
if (rval < 0) { |
136 |
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fprintf(stderr, "%s: cannot open picture file \"%s\"\n", |
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progname, picture); |
138 |
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exit(1); |
139 |
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} else if (rval == 0) { |
140 |
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fprintf(stderr, |
141 |
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"%s: cannot get view from picture \"%s\"\n", |
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progname, picture); |
143 |
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exit(1); |
144 |
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} |
145 |
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if (pictview.type == VT_PAR) { |
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fprintf(stderr, "%s: %s: cannot use parallel view\n", |
147 |
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progname, picture); |
148 |
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exit(1); |
149 |
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} |
150 |
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if ((err = setview(&pictview)) != NULL) { |
151 |
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fprintf(stderr, "%s: %s\n", picture, err); |
152 |
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exit(1); |
153 |
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} |
154 |
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} |
155 |
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if (!gotview) { |
156 |
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if (picture == NULL) { |
157 |
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fprintf(stderr, "%s: must have view or picture\n", |
158 |
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progname); |
159 |
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exit(1); |
160 |
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} |
161 |
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copystruct(&ourview, &pictview); |
162 |
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} else if (picture != NULL && !VEQ(ourview.vp, pictview.vp)) { |
163 |
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fprintf(stderr, "%s: picture must have same viewpoint\n", |
164 |
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progname); |
165 |
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exit(1); |
166 |
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} |
167 |
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ourview.type = VT_HEM; |
168 |
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ourview.horiz = ourview.vert = 180.0; |
169 |
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ourview.hoff = ourview.voff = 0.0; |
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fvsum(ourview.vdir, ourview.vdir, ourview.vup, |
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-DOT(ourview.vdir,ourview.vup)); |
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if ((err = setview(&ourview)) != NULL) { |
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fprintf(stderr, "%s: %s\n", progname, err); |
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exit(1); |
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} |
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if (octree == NULL && picture == NULL) { |
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fprintf(stderr, |
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"%s: must specify at least one of picture or octree\n", |
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progname); |
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exit(1); |
181 |
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} |
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init(); /* initialize program */ |
183 |
greg |
1.8 |
if (threshold <= FTINY) |
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comp_thresh(); /* compute glare threshold */ |
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greg |
1.1 |
analyze(); /* analyze view */ |
186 |
greg |
1.16 |
if (combine) |
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absorb_specks(); /* eliminate tiny sources */ |
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greg |
1.1 |
cleanup(); /* tidy up */ |
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/* print header */ |
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printargs(argc, argv, stdout); |
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fputs(VIEWSTR, stdout); |
192 |
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fprintview(&ourview, stdout); |
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greg |
1.18 |
printf("\n"); |
194 |
greg |
1.21 |
fputformat("ascii", stdout); |
195 |
greg |
1.18 |
printf("\n"); |
196 |
greg |
1.1 |
printsources(); /* print glare sources */ |
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printillum(); /* print illuminances */ |
198 |
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exit(0); |
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userr: |
200 |
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fprintf(stderr, |
201 |
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"Usage: %s [view options][-ga angles][-p picture][[rtrace options] octree]\n", |
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progname); |
203 |
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exit(1); |
204 |
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} |
205 |
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206 |
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207 |
greg |
1.23 |
int |
208 |
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angcmp(ap1, ap2) /* compare two angles */ |
209 |
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ANGLE *ap1, *ap2; |
210 |
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{ |
211 |
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register int a1, a2; |
212 |
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213 |
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a1 = *ap1; |
214 |
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a2 = *ap2; |
215 |
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if (a1 == a2) { |
216 |
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fprintf(stderr, "%s: duplicate glare angle (%d)\n", |
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progname, a1); |
218 |
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exit(1); |
219 |
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} |
220 |
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return(a1-a2); |
221 |
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} |
222 |
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223 |
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224 |
greg |
1.1 |
init() /* initialize global variables */ |
225 |
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{ |
226 |
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double d; |
227 |
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register int i; |
228 |
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229 |
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if (verbose) |
230 |
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fprintf(stderr, "%s: initializing data structures...\n", |
231 |
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progname); |
232 |
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/* set direction vectors */ |
233 |
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for (i = 0; glarang[i] != AEND; i++) |
234 |
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; |
235 |
greg |
1.23 |
qsort(glarang, i, sizeof(ANGLE), angcmp); |
236 |
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if (i > 0 && (glarang[0] <= 0 || glarang[i-1] > 180)) { |
237 |
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fprintf(stderr, "%s: glare angles must be between 1 and 180\n", |
238 |
greg |
1.1 |
progname); |
239 |
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exit(1); |
240 |
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} |
241 |
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nglarangs = i; |
242 |
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/* nglardirs = 2*nglarangs + 1; */ |
243 |
greg |
1.5 |
/* vsize = sampdens - 1; */ |
244 |
greg |
1.2 |
if (nglarangs > 0) |
245 |
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maxtheta = (PI/180.)*glarang[nglarangs-1]; |
246 |
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else |
247 |
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maxtheta = 0.0; |
248 |
greg |
1.19 |
hsize = hlim(0) + sampdens - 1; |
249 |
greg |
1.4 |
if (hsize > (int)(PI*sampdens)) |
250 |
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hsize = PI*sampdens; |
251 |
greg |
1.1 |
indirect = (struct illum *)calloc(nglardirs, sizeof(struct illum)); |
252 |
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if (indirect == NULL) |
253 |
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memerr("indirect illuminances"); |
254 |
greg |
1.13 |
npixinvw = npixmiss = 0L; |
255 |
greg |
1.1 |
copystruct(&leftview, &ourview); |
256 |
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copystruct(&rightview, &ourview); |
257 |
greg |
1.3 |
spinvector(leftview.vdir, ourview.vdir, ourview.vup, maxtheta); |
258 |
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spinvector(rightview.vdir, ourview.vdir, ourview.vup, -maxtheta); |
259 |
greg |
1.1 |
setview(&leftview); |
260 |
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setview(&rightview); |
261 |
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indirect[nglarangs].lcos = |
262 |
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indirect[nglarangs].rcos = cos(maxtheta); |
263 |
greg |
1.9 |
indirect[nglarangs].rsin = |
264 |
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-(indirect[nglarangs].lsin = sin(maxtheta)); |
265 |
greg |
1.1 |
indirect[nglarangs].theta = 0.0; |
266 |
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for (i = 0; i < nglarangs; i++) { |
267 |
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d = (glarang[nglarangs-1] - glarang[i])*(PI/180.); |
268 |
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indirect[nglarangs-i-1].lcos = |
269 |
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indirect[nglarangs+i+1].rcos = cos(d); |
270 |
greg |
1.9 |
indirect[nglarangs+i+1].rsin = |
271 |
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-(indirect[nglarangs-i-1].lsin = sin(d)); |
272 |
greg |
1.1 |
d = (glarang[nglarangs-1] + glarang[i])*(PI/180.); |
273 |
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indirect[nglarangs-i-1].rcos = |
274 |
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indirect[nglarangs+i+1].lcos = cos(d); |
275 |
greg |
1.9 |
indirect[nglarangs-i-1].rsin = |
276 |
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-(indirect[nglarangs+i+1].lsin = sin(d)); |
277 |
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indirect[nglarangs-i-1].theta = (PI/180.)*glarang[i]; |
278 |
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indirect[nglarangs+i+1].theta = -(PI/180.)*glarang[i]; |
279 |
greg |
1.1 |
} |
280 |
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/* open picture */ |
281 |
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if (picture != NULL) { |
282 |
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if (verbose) |
283 |
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fprintf(stderr, "%s: opening picture file \"%s\"...\n", |
284 |
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progname, picture); |
285 |
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open_pict(picture); |
286 |
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} |
287 |
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/* start rtrace */ |
288 |
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if (octree != NULL) { |
289 |
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if (verbose) { |
290 |
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fprintf(stderr, |
291 |
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"%s: starting luminance calculation...\n\t", |
292 |
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progname); |
293 |
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printargs(rtargc, rtargv, stderr); |
294 |
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} |
295 |
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fork_rtrace(rtargv); |
296 |
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} |
297 |
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} |
298 |
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299 |
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300 |
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cleanup() /* close files, wait for children */ |
301 |
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{ |
302 |
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if (verbose) |
303 |
greg |
1.17 |
fprintf(stderr, "%s: cleaning up... \n", progname); |
304 |
greg |
1.1 |
if (picture != NULL) |
305 |
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close_pict(); |
306 |
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if (octree != NULL) |
307 |
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done_rtrace(); |
308 |
greg |
1.13 |
if (npixinvw < 100*npixmiss) |
309 |
greg |
2.3 |
fprintf(stderr, "%s: warning -- missing %d%% of samples\n", |
310 |
|
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progname, (int)(100L*npixmiss/npixinvw)); |
311 |
greg |
1.1 |
} |
312 |
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|
313 |
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314 |
greg |
1.19 |
compdir(vd, x, y) /* compute direction for x,y */ |
315 |
greg |
1.1 |
FVECT vd; |
316 |
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int x, y; |
317 |
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{ |
318 |
greg |
1.19 |
int hl; |
319 |
greg |
1.1 |
FVECT org; /* dummy variable */ |
320 |
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|
321 |
greg |
1.19 |
hl = hlim(y); |
322 |
greg |
1.22 |
if (x <= -hl) { /* left region */ |
323 |
|
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if (x <= -hl-sampdens) |
324 |
|
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return(-1); |
325 |
greg |
1.1 |
return(viewray(org, vd, &leftview, |
326 |
greg |
1.19 |
(double)(x+hl)/(2*sampdens)+.5, |
327 |
greg |
1.13 |
(double)y/(2*sampdens)+.5)); |
328 |
greg |
1.22 |
} |
329 |
|
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if (x >= hl) { /* right region */ |
330 |
|
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if (x >= hl+sampdens) |
331 |
|
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return(-1); |
332 |
greg |
1.1 |
return(viewray(org, vd, &rightview, |
333 |
greg |
1.19 |
(double)(x-hl)/(2*sampdens)+.5, |
334 |
greg |
1.13 |
(double)y/(2*sampdens)+.5)); |
335 |
greg |
1.22 |
} |
336 |
greg |
1.14 |
/* central region */ |
337 |
greg |
1.13 |
if (viewray(org, vd, &ourview, .5, (double)y/(2*sampdens)+.5) < 0) |
338 |
greg |
1.1 |
return(-1); |
339 |
greg |
1.19 |
spinvector(vd, vd, ourview.vup, h_theta(x,y)); |
340 |
greg |
1.1 |
return(0); |
341 |
greg |
1.17 |
} |
342 |
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|
343 |
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|
344 |
greg |
1.19 |
double |
345 |
|
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pixsize(x, y) /* return the solid angle of pixel at (x,y) */ |
346 |
|
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int x, y; |
347 |
greg |
1.17 |
{ |
348 |
greg |
1.19 |
register int hl, xo; |
349 |
|
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double disc; |
350 |
|
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|
351 |
|
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hl = hlim(y); |
352 |
|
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if (x < -hl) |
353 |
|
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xo = x+hl; |
354 |
|
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else if (x > hl) |
355 |
|
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xo = x-hl; |
356 |
|
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else |
357 |
|
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xo = 0; |
358 |
greg |
1.20 |
disc = 1. - (double)(xo*xo + y*y)/(sampdens*sampdens); |
359 |
greg |
1.19 |
if (disc <= FTINY) |
360 |
|
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return(0.); |
361 |
|
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return(1./(sampdens*sampdens*sqrt(disc))); |
362 |
greg |
1.1 |
} |
363 |
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|
364 |
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|
365 |
|
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memerr(s) /* malloc failure */ |
366 |
|
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char *s; |
367 |
|
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{ |
368 |
greg |
1.5 |
fprintf(stderr, "%s: out of memory for %s\n", progname, s); |
369 |
greg |
1.1 |
exit(1); |
370 |
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} |
371 |
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|
372 |
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|
373 |
|
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printsources() /* print out glare sources */ |
374 |
|
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{ |
375 |
|
|
register struct source *sp; |
376 |
|
|
|
377 |
|
|
printf("BEGIN glare source\n"); |
378 |
|
|
for (sp = donelist; sp != NULL; sp = sp->next) |
379 |
|
|
printf("\t%f %f %f\t%f\t%f\n", |
380 |
|
|
sp->dir[0], sp->dir[1], sp->dir[2], |
381 |
|
|
sp->dom, sp->brt); |
382 |
|
|
printf("END glare source\n"); |
383 |
|
|
} |
384 |
|
|
|
385 |
|
|
|
386 |
|
|
printillum() /* print out indirect illuminances */ |
387 |
|
|
{ |
388 |
|
|
register int i; |
389 |
|
|
|
390 |
|
|
printf("BEGIN indirect illuminance\n"); |
391 |
|
|
for (i = 0; i < nglardirs; i++) |
392 |
greg |
1.12 |
if (indirect[i].n > FTINY) |
393 |
|
|
printf("\t%.0f\t%f\n", (180.0/PI)*indirect[i].theta, |
394 |
|
|
PI * indirect[i].sum / indirect[i].n); |
395 |
greg |
1.2 |
printf("END indirect illuminance\n"); |
396 |
greg |
1.1 |
} |