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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* Find glare sources in a scene or image. |
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* |
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#include "glare.h" |
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|
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#define FEQ(a,b) ((a)-(b)<=FTINY&&(a)-(b)<=FTINY) |
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#define FEQ(a,b) ((a)-(b)<=FTINY&&(b)-(a)<=FTINY) |
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#define VEQ(v1,v2) (FEQ((v1)[0],(v2)[0])&&FEQ((v1)[1],(v2)[1]) \ |
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&&FEQ((v1)[2],(v2)[2])) |
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|
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char *rtargv[32] = {"rtrace", "-h", "-ov", "-fff"}; |
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int rtargc = 4; |
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char *rtargv[64] = {"rtrace", "-h-", "-ov", "-fff", "-ld-", "-i-", "-I-"}; |
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int rtargc = 7; |
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|
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VIEW ourview = STDVIEW; /* our view */ |
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VIEW pictview = STDVIEW; /* picture view */ |
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int nglarangs = 0; |
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double maxtheta; /* maximum angle (in radians) */ |
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int hsize; /* horizontal size */ |
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int hlim; /* central limit of horizontal */ |
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struct illum *indirect; /* array of indirect illuminances */ |
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long npixinvw; /* number of pixels in view */ |
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long npixmiss; /* number of pixels missed */ |
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|
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static int angcmp(const void *ap1, const void *ap2); |
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static void init(void); |
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static void cleanup(void); |
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static void printsources(void); |
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static void printillum(void); |
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|
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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|
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|
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int |
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main( |
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int argc, |
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char *argv[] |
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) |
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{ |
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int combine = 1; |
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int gotview = 0; |
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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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/* expand arguments */ |
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while ((rval = expandarg(&argc, &argv, i)) > 0) |
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; |
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if (rval < 0) { |
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fprintf(stderr, "%s: cannot expand '%s'", |
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argv[0], argv[i]); |
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exit(1); |
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} |
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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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} |
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if (argv[i][2] != 'f') |
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goto userr; |
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rval = viewfile(argv[++i], &ourview, 0, 0); |
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rval = viewfile(argv[++i], &ourview, NULL); |
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if (rval < 0) { |
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fprintf(stderr, |
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"%s: cannot open view file \"%s\"\n", |
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combine = !combine; |
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break; |
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case 'd': |
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rtargv[rtargc++] = argv[i]; |
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if (argv[i][2] != 'v') |
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rtargv[rtargc++] = argv[++i]; |
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break; |
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case 'l': |
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if (argv[i][2] == 'd') |
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break; |
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/* FALL THROUGH */ |
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case 's': |
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case 'P': |
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rtargv[rtargc++] = argv[i]; |
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rtargv[rtargc++] = argv[++i]; |
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break; |
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case 'w': |
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rtargv[rtargc++] = argv[i]; |
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break; |
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case 'a': |
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rtargv[rtargc++] = argv[i]; |
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if (argv[i][2] == 'v') { |
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} |
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/* get view */ |
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if (picture != NULL) { |
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rval = viewfile(picture, &pictview, 0, 0); |
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rval = viewfile(picture, &pictview, NULL); |
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if (rval < 0) { |
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fprintf(stderr, "%s: cannot open picture file \"%s\"\n", |
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progname, picture); |
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progname); |
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exit(1); |
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} |
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copystruct(&ourview, &pictview); |
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ourview = pictview; |
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} else if (picture != NULL && !VEQ(ourview.vp, pictview.vp)) { |
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fprintf(stderr, "%s: picture must have same viewpoint\n", |
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progname); |
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absorb_specks(); /* eliminate tiny sources */ |
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cleanup(); /* tidy up */ |
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/* print header */ |
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newheader("RADIANCE", stdout); |
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printargs(argc, argv, stdout); |
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fputs(VIEWSTR, stdout); |
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fprintview(&ourview, stdout); |
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printf("\n"); |
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fputformat("ASCII", stdout); |
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fputformat("ascii", stdout); |
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printf("\n"); |
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printsources(); /* print glare sources */ |
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printillum(); /* print illuminances */ |
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} |
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init() /* initialize global variables */ |
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static int |
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angcmp( /* compare two angles */ |
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const void *ap1, |
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const void *ap2 |
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) |
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{ |
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register int a1, a2; |
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|
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a1 = *(ANGLE *)ap1; |
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a2 = *(ANGLE *)ap2; |
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if (a1 == a2) { |
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fprintf(stderr, "%s: duplicate glare angle (%d)\n", |
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progname, a1); |
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exit(1); |
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} |
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return(a1-a2); |
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} |
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|
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|
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static void |
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init(void) /* initialize global variables */ |
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{ |
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double d; |
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register int i; |
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/* set direction vectors */ |
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for (i = 0; glarang[i] != AEND; i++) |
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; |
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if (i > 0 && (glarang[0] <= 0 || glarang[i-1] >= 180)) { |
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fprintf(stderr, "%s: glare angles must be between 1 and 179\n", |
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qsort(glarang, i, sizeof(ANGLE), angcmp); |
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if (i > 0 && (glarang[0] <= 0 || glarang[i-1] > 180)) { |
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fprintf(stderr, "%s: glare angles must be between 1 and 180\n", |
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progname); |
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exit(1); |
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} |
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maxtheta = (PI/180.)*glarang[nglarangs-1]; |
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else |
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maxtheta = 0.0; |
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hlim = sampdens*maxtheta; |
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hsize = hlim + sampdens - 1; |
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hsize = hlim(0) + sampdens - 1; |
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if (hsize > (int)(PI*sampdens)) |
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hsize = PI*sampdens; |
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indirect = (struct illum *)calloc(nglardirs, sizeof(struct illum)); |
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if (indirect == NULL) |
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memerr("indirect illuminances"); |
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npixinvw = npixmiss = 0L; |
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copystruct(&leftview, &ourview); |
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copystruct(&rightview, &ourview); |
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leftview = ourview; |
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rightview = ourview; |
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spinvector(leftview.vdir, ourview.vdir, ourview.vup, maxtheta); |
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spinvector(rightview.vdir, ourview.vdir, ourview.vup, -maxtheta); |
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setview(&leftview); |
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} |
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cleanup() /* close files, wait for children */ |
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static void |
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cleanup(void) /* close files, wait for children */ |
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{ |
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if (verbose) |
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fprintf(stderr, "%s: cleaning up... \n", progname); |
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if (octree != NULL) |
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done_rtrace(); |
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if (npixinvw < 100*npixmiss) |
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fprintf(stderr, "%s: warning -- missing %ld%% of samples\n", |
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progname, 100L*npixmiss/npixinvw); |
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fprintf(stderr, "%s: warning -- missing %d%% of samples\n", |
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progname, (int)(100L*npixmiss/npixinvw)); |
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} |
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compdir(vd, x, y, se) /* compute direction for x,y */ |
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FVECT vd; |
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int x, y; |
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SPANERR *se; |
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extern int |
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compdir( /* compute direction for x,y */ |
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FVECT vd, |
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int x, |
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int y |
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) |
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{ |
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int hl; |
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FVECT org; /* dummy variable */ |
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if (x <= -hlim) /* left region */ |
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hl = hlim(y); |
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if (x <= -hl) { /* left region */ |
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if (x <= -hl-sampdens) |
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return(-1); |
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return(viewray(org, vd, &leftview, |
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(double)(x+hlim)/(2*sampdens)+.5, |
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(double)(x+hl)/(2*sampdens)+.5, |
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(double)y/(2*sampdens)+.5)); |
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if (x >= hlim) /* right region */ |
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} |
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if (x >= hl) { /* right region */ |
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if (x >= hl+sampdens) |
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return(-1); |
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return(viewray(org, vd, &rightview, |
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(double)(x-hlim)/(2*sampdens)+.5, |
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(double)(x-hl)/(2*sampdens)+.5, |
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(double)y/(2*sampdens)+.5)); |
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/* central region */ |
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if (se != NULL) { /* avoid over-counting of poles */ |
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se->err += se->prob; |
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if (se->err <= 0.5) |
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return(-1); |
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se->err -= 1.0; |
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} |
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/* central region */ |
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if (viewray(org, vd, &ourview, .5, (double)y/(2*sampdens)+.5) < 0) |
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return(-1); |
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spinvector(vd, vd, ourview.vup, h_theta(x)); |
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spinvector(vd, vd, ourview.vup, h_theta(x,y)); |
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return(0); |
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} |
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setspanerr(se, y) /* initialize span error at y */ |
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register SPANERR *se; |
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int y; |
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extern double |
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pixsize( /* return the solid angle of pixel at (x,y) */ |
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int x, |
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int y |
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) |
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{ |
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se->err = 0.0; |
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se->prob = sqrt(1.0 - (double)((long)y*y)/((long)vsize*vsize)); |
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register int hl, xo; |
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double disc; |
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|
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hl = hlim(y); |
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if (x < -hl) |
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xo = x+hl; |
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else if (x > hl) |
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xo = x-hl; |
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else |
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xo = 0; |
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disc = 1. - (double)((long)xo*xo + (long)y*y)/((long)sampdens*sampdens); |
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if (disc <= FTINY*FTINY) |
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return(0.); |
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return(1./(sampdens*sampdens*sqrt(disc))); |
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} |
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memerr(s) /* malloc failure */ |
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char *s; |
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extern void |
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memerr( /* malloc failure */ |
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char *s |
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) |
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{ |
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fprintf(stderr, "%s: out of memory for %s\n", progname, s); |
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exit(1); |
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} |
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printsources() /* print out glare sources */ |
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static void |
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printsources(void) /* print out glare sources */ |
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{ |
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register struct source *sp; |
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} |
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printillum() /* print out indirect illuminances */ |
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static void |
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printillum(void) /* print out indirect illuminances */ |
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{ |
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register int i; |
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