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root/radiance/ray/src/util/findglare.c
Revision: 1.20
Committed: Mon Apr 22 08:21:01 1991 UTC (32 years, 11 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 1.19: +1 -1 lines
Log Message:
fixed minor bugs in last change

File Contents

# User Rev Content
1 greg 1.1 /* Copyright (c) 1991 Regents of the University of California */
2    
3     #ifndef lint
4     static char SCCSid[] = "$SunId$ LBL";
5     #endif
6    
7     /*
8     * Find glare sources in a scene or image.
9     *
10     * Greg Ward March 1991
11     */
12    
13     #include "glare.h"
14    
15     #define FEQ(a,b) ((a)-(b)<=FTINY&&(a)-(b)<=FTINY)
16     #define VEQ(v1,v2) (FEQ((v1)[0],(v2)[0])&&FEQ((v1)[1],(v2)[1]) \
17     &&FEQ((v1)[2],(v2)[2]))
18    
19     char *rtargv[32] = {"rtrace", "-h", "-ov", "-fff"};
20     int rtargc = 4;
21    
22 greg 1.6 VIEW ourview = STDVIEW; /* our view */
23 greg 1.1 VIEW pictview = STDVIEW; /* picture view */
24     VIEW leftview, rightview; /* leftmost and rightmost views */
25    
26     char *picture = NULL; /* picture file name */
27     char *octree = NULL; /* octree file name */
28    
29     int verbose = 0; /* verbose reporting */
30     char *progname; /* global argv[0] */
31    
32 greg 1.8 double threshold = 0.; /* glare threshold */
33    
34 greg 1.4 int sampdens = SAMPDENS; /* sample density */
35 greg 1.1 ANGLE glarang[180] = {AEND}; /* glare calculation angles */
36     int nglarangs = 0;
37 greg 1.2 double maxtheta; /* maximum angle (in radians) */
38 greg 1.1 int hsize; /* horizontal size */
39    
40     struct illum *indirect; /* array of indirect illuminances */
41    
42 greg 1.13 long npixinvw; /* number of pixels in view */
43     long npixmiss; /* number of pixels missed */
44 greg 1.1
45 greg 1.13
46 greg 1.1 main(argc, argv)
47     int argc;
48     char *argv[];
49     {
50 greg 1.16 int combine = 1;
51 greg 1.1 int gotview = 0;
52     int rval, i;
53     char *err;
54    
55     progname = argv[0];
56     /* process options */
57     for (i = 1; i < argc && argv[i][0] == '-'; i++) {
58     rval = getviewopt(&ourview, argc-i, argv+i);
59     if (rval >= 0) {
60     i += rval;
61     gotview++;
62     continue;
63     }
64     switch (argv[i][1]) {
65 greg 1.8 case 't':
66     threshold = atof(argv[++i]);
67     break;
68 greg 1.4 case 'r':
69     sampdens = atoi(argv[++i])/2;
70     break;
71 greg 1.1 case 'v':
72     if (argv[i][2] == '\0') {
73     verbose++;
74     break;
75     }
76     if (argv[i][2] != 'f')
77     goto userr;
78     rval = viewfile(argv[++i], &ourview, 0, 0);
79     if (rval < 0) {
80     fprintf(stderr,
81     "%s: cannot open view file \"%s\"\n",
82     progname, argv[i]);
83     exit(1);
84     } else if (rval == 0) {
85     fprintf(stderr,
86     "%s: bad view file \"%s\"\n",
87     progname, argv[i]);
88     exit(1);
89     } else
90     gotview++;
91     break;
92     case 'g':
93     if (argv[i][2] != 'a')
94     goto userr;
95     if (setscan(glarang, argv[++i]) < 0) {
96     fprintf(stderr, "%s: bad angle spec \"%s\"\n",
97     progname, argv[i]);
98     exit(1);
99     }
100     break;
101     case 'p':
102     picture = argv[++i];
103     break;
104 greg 1.16 case 'c':
105     combine = !combine;
106     break;
107 greg 1.1 case 'd':
108     case 'l':
109     rtargv[rtargc++] = argv[i];
110     rtargv[rtargc++] = argv[++i];
111     break;
112     case 'a':
113     rtargv[rtargc++] = argv[i];
114     if (argv[i][2] == 'v') {
115     rtargv[rtargc++] = argv[++i];
116     rtargv[rtargc++] = argv[++i];
117     }
118     rtargv[rtargc++] = argv[++i];
119     break;
120     default:
121     goto userr;
122     }
123     }
124     /* get octree */
125     if (i < argc-1)
126     goto userr;
127     if (i == argc-1) {
128     rtargv[rtargc++] = octree = argv[i];
129     rtargv[rtargc] = NULL;
130     }
131     /* get view */
132     if (picture != NULL) {
133     rval = viewfile(picture, &pictview, 0, 0);
134     if (rval < 0) {
135     fprintf(stderr, "%s: cannot open picture file \"%s\"\n",
136     progname, picture);
137     exit(1);
138     } else if (rval == 0) {
139     fprintf(stderr,
140     "%s: cannot get view from picture \"%s\"\n",
141     progname, picture);
142     exit(1);
143     }
144     if (pictview.type == VT_PAR) {
145     fprintf(stderr, "%s: %s: cannot use parallel view\n",
146     progname, picture);
147     exit(1);
148     }
149     if ((err = setview(&pictview)) != NULL) {
150     fprintf(stderr, "%s: %s\n", picture, err);
151     exit(1);
152     }
153     }
154     if (!gotview) {
155     if (picture == NULL) {
156     fprintf(stderr, "%s: must have view or picture\n",
157     progname);
158     exit(1);
159     }
160     copystruct(&ourview, &pictview);
161     } else if (picture != NULL && !VEQ(ourview.vp, pictview.vp)) {
162     fprintf(stderr, "%s: picture must have same viewpoint\n",
163     progname);
164     exit(1);
165     }
166     ourview.type = VT_HEM;
167     ourview.horiz = ourview.vert = 180.0;
168     ourview.hoff = ourview.voff = 0.0;
169     fvsum(ourview.vdir, ourview.vdir, ourview.vup,
170     -DOT(ourview.vdir,ourview.vup));
171     if ((err = setview(&ourview)) != NULL) {
172     fprintf(stderr, "%s: %s\n", progname, err);
173     exit(1);
174     }
175     if (octree == NULL && picture == NULL) {
176     fprintf(stderr,
177     "%s: must specify at least one of picture or octree\n",
178     progname);
179     exit(1);
180     }
181     init(); /* initialize program */
182 greg 1.8 if (threshold <= FTINY)
183     comp_thresh(); /* compute glare threshold */
184 greg 1.1 analyze(); /* analyze view */
185 greg 1.16 if (combine)
186     absorb_specks(); /* eliminate tiny sources */
187 greg 1.1 cleanup(); /* tidy up */
188     /* print header */
189     printargs(argc, argv, stdout);
190     fputs(VIEWSTR, stdout);
191     fprintview(&ourview, stdout);
192 greg 1.18 printf("\n");
193     fputformat("ASCII", stdout);
194     printf("\n");
195 greg 1.1 printsources(); /* print glare sources */
196     printillum(); /* print illuminances */
197     exit(0);
198     userr:
199     fprintf(stderr,
200     "Usage: %s [view options][-ga angles][-p picture][[rtrace options] octree]\n",
201     progname);
202     exit(1);
203     }
204    
205    
206     init() /* initialize global variables */
207     {
208     double d;
209     register int i;
210    
211     if (verbose)
212     fprintf(stderr, "%s: initializing data structures...\n",
213     progname);
214     /* set direction vectors */
215     for (i = 0; glarang[i] != AEND; i++)
216     ;
217 greg 1.10 if (i > 0 && (glarang[0] <= 0 || glarang[i-1] >= 180)) {
218 greg 1.1 fprintf(stderr, "%s: glare angles must be between 1 and 179\n",
219     progname);
220     exit(1);
221     }
222     nglarangs = i;
223     /* nglardirs = 2*nglarangs + 1; */
224 greg 1.5 /* vsize = sampdens - 1; */
225 greg 1.2 if (nglarangs > 0)
226     maxtheta = (PI/180.)*glarang[nglarangs-1];
227     else
228     maxtheta = 0.0;
229 greg 1.19 hsize = hlim(0) + sampdens - 1;
230 greg 1.4 if (hsize > (int)(PI*sampdens))
231     hsize = PI*sampdens;
232 greg 1.1 indirect = (struct illum *)calloc(nglardirs, sizeof(struct illum));
233     if (indirect == NULL)
234     memerr("indirect illuminances");
235 greg 1.13 npixinvw = npixmiss = 0L;
236 greg 1.1 copystruct(&leftview, &ourview);
237     copystruct(&rightview, &ourview);
238 greg 1.3 spinvector(leftview.vdir, ourview.vdir, ourview.vup, maxtheta);
239     spinvector(rightview.vdir, ourview.vdir, ourview.vup, -maxtheta);
240 greg 1.1 setview(&leftview);
241     setview(&rightview);
242     indirect[nglarangs].lcos =
243     indirect[nglarangs].rcos = cos(maxtheta);
244 greg 1.9 indirect[nglarangs].rsin =
245     -(indirect[nglarangs].lsin = sin(maxtheta));
246 greg 1.1 indirect[nglarangs].theta = 0.0;
247     for (i = 0; i < nglarangs; i++) {
248     d = (glarang[nglarangs-1] - glarang[i])*(PI/180.);
249     indirect[nglarangs-i-1].lcos =
250     indirect[nglarangs+i+1].rcos = cos(d);
251 greg 1.9 indirect[nglarangs+i+1].rsin =
252     -(indirect[nglarangs-i-1].lsin = sin(d));
253 greg 1.1 d = (glarang[nglarangs-1] + glarang[i])*(PI/180.);
254     indirect[nglarangs-i-1].rcos =
255     indirect[nglarangs+i+1].lcos = cos(d);
256 greg 1.9 indirect[nglarangs-i-1].rsin =
257     -(indirect[nglarangs+i+1].lsin = sin(d));
258     indirect[nglarangs-i-1].theta = (PI/180.)*glarang[i];
259     indirect[nglarangs+i+1].theta = -(PI/180.)*glarang[i];
260 greg 1.1 }
261     /* open picture */
262     if (picture != NULL) {
263     if (verbose)
264     fprintf(stderr, "%s: opening picture file \"%s\"...\n",
265     progname, picture);
266     open_pict(picture);
267     }
268     /* start rtrace */
269     if (octree != NULL) {
270     if (verbose) {
271     fprintf(stderr,
272     "%s: starting luminance calculation...\n\t",
273     progname);
274     printargs(rtargc, rtargv, stderr);
275     }
276     fork_rtrace(rtargv);
277     }
278     }
279    
280    
281     cleanup() /* close files, wait for children */
282     {
283     if (verbose)
284 greg 1.17 fprintf(stderr, "%s: cleaning up... \n", progname);
285 greg 1.1 if (picture != NULL)
286     close_pict();
287     if (octree != NULL)
288     done_rtrace();
289 greg 1.13 if (npixinvw < 100*npixmiss)
290     fprintf(stderr, "%s: warning -- missing %ld%% of samples\n",
291     progname, 100L*npixmiss/npixinvw);
292 greg 1.1 }
293    
294    
295 greg 1.19 compdir(vd, x, y) /* compute direction for x,y */
296 greg 1.1 FVECT vd;
297     int x, y;
298     {
299 greg 1.19 int hl;
300 greg 1.1 FVECT org; /* dummy variable */
301    
302 greg 1.19 hl = hlim(y);
303     if (x <= -hl) /* left region */
304 greg 1.1 return(viewray(org, vd, &leftview,
305 greg 1.19 (double)(x+hl)/(2*sampdens)+.5,
306 greg 1.13 (double)y/(2*sampdens)+.5));
307 greg 1.19 if (x >= hl) /* right region */
308 greg 1.1 return(viewray(org, vd, &rightview,
309 greg 1.19 (double)(x-hl)/(2*sampdens)+.5,
310 greg 1.13 (double)y/(2*sampdens)+.5));
311 greg 1.14 /* central region */
312 greg 1.13 if (viewray(org, vd, &ourview, .5, (double)y/(2*sampdens)+.5) < 0)
313 greg 1.1 return(-1);
314 greg 1.19 spinvector(vd, vd, ourview.vup, h_theta(x,y));
315 greg 1.1 return(0);
316 greg 1.17 }
317    
318    
319 greg 1.19 double
320     pixsize(x, y) /* return the solid angle of pixel at (x,y) */
321     int x, y;
322 greg 1.17 {
323 greg 1.19 register int hl, xo;
324     double disc;
325    
326     hl = hlim(y);
327     if (x < -hl)
328     xo = x+hl;
329     else if (x > hl)
330     xo = x-hl;
331     else
332     xo = 0;
333 greg 1.20 disc = 1. - (double)(xo*xo + y*y)/(sampdens*sampdens);
334 greg 1.19 if (disc <= FTINY)
335     return(0.);
336     return(1./(sampdens*sampdens*sqrt(disc)));
337 greg 1.1 }
338    
339    
340     memerr(s) /* malloc failure */
341     char *s;
342     {
343 greg 1.5 fprintf(stderr, "%s: out of memory for %s\n", progname, s);
344 greg 1.1 exit(1);
345     }
346    
347    
348     printsources() /* print out glare sources */
349     {
350     register struct source *sp;
351    
352     printf("BEGIN glare source\n");
353     for (sp = donelist; sp != NULL; sp = sp->next)
354     printf("\t%f %f %f\t%f\t%f\n",
355     sp->dir[0], sp->dir[1], sp->dir[2],
356     sp->dom, sp->brt);
357     printf("END glare source\n");
358     }
359    
360    
361     printillum() /* print out indirect illuminances */
362     {
363     register int i;
364    
365     printf("BEGIN indirect illuminance\n");
366     for (i = 0; i < nglardirs; i++)
367 greg 1.12 if (indirect[i].n > FTINY)
368     printf("\t%.0f\t%f\n", (180.0/PI)*indirect[i].theta,
369     PI * indirect[i].sum / indirect[i].n);
370 greg 1.2 printf("END indirect illuminance\n");
371 greg 1.1 }