| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: findglare.c,v 2.13 2009/02/07 05:40:47 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Find glare sources in a scene or image. |
| 6 |
* |
| 7 |
* Greg Ward March 1991 |
| 8 |
*/ |
| 9 |
|
| 10 |
#include "glare.h" |
| 11 |
|
| 12 |
#define FEQ(a,b) ((a)-(b)<=FTINY&&(b)-(a)<=FTINY) |
| 13 |
#define VEQ(v1,v2) (FEQ((v1)[0],(v2)[0])&&FEQ((v1)[1],(v2)[1]) \ |
| 14 |
&&FEQ((v1)[2],(v2)[2])) |
| 15 |
|
| 16 |
char *rtargv[64] = {"rtrace", "-h-", "-ov", "-fff", "-ld-", "-i-", "-I-"}; |
| 17 |
int rtargc = 7; |
| 18 |
|
| 19 |
VIEW ourview = STDVIEW; /* our view */ |
| 20 |
VIEW pictview = STDVIEW; /* picture view */ |
| 21 |
VIEW leftview, rightview; /* leftmost and rightmost views */ |
| 22 |
|
| 23 |
char *picture = NULL; /* picture file name */ |
| 24 |
char *octree = NULL; /* octree file name */ |
| 25 |
|
| 26 |
int verbose = 0; /* verbose reporting */ |
| 27 |
char *progname; /* global argv[0] */ |
| 28 |
|
| 29 |
double threshold = 0.; /* glare threshold */ |
| 30 |
|
| 31 |
int sampdens = SAMPDENS; /* sample density */ |
| 32 |
ANGLE glarang[180] = {AEND}; /* glare calculation angles */ |
| 33 |
int nglarangs = 0; |
| 34 |
double maxtheta; /* maximum angle (in radians) */ |
| 35 |
int hsize; /* horizontal size */ |
| 36 |
|
| 37 |
struct illum *indirect; /* array of indirect illuminances */ |
| 38 |
|
| 39 |
long npixinvw; /* number of pixels in view */ |
| 40 |
long npixmiss; /* number of pixels missed */ |
| 41 |
|
| 42 |
static int angcmp(const void *ap1, const void *ap2); |
| 43 |
static void init(void); |
| 44 |
static void cleanup(void); |
| 45 |
static void printsources(void); |
| 46 |
static void printillum(void); |
| 47 |
|
| 48 |
|
| 49 |
|
| 50 |
int |
| 51 |
main( |
| 52 |
int argc, |
| 53 |
char *argv[] |
| 54 |
) |
| 55 |
{ |
| 56 |
int combine = 1; |
| 57 |
int gotview = 0; |
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int rval, i; |
| 59 |
char *err; |
| 60 |
|
| 61 |
progname = argv[0]; |
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/* process options */ |
| 63 |
for (i = 1; i < argc && argv[i][0] == '-'; i++) { |
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/* expand arguments */ |
| 65 |
while ((rval = expandarg(&argc, &argv, i)) > 0) |
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; |
| 67 |
if (rval < 0) { |
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fprintf(stderr, "%s: cannot expand '%s'\n", |
| 69 |
argv[0], argv[i]); |
| 70 |
exit(1); |
| 71 |
} |
| 72 |
rval = getviewopt(&ourview, argc-i, argv+i); |
| 73 |
if (rval >= 0) { |
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i += rval; |
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gotview++; |
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continue; |
| 77 |
} |
| 78 |
switch (argv[i][1]) { |
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case 't': |
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threshold = atof(argv[++i]); |
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break; |
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case 'r': |
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sampdens = atoi(argv[++i])/2; |
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break; |
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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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} |
| 90 |
if (argv[i][2] != 'f') |
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goto userr; |
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rval = viewfile(argv[++i], &ourview, NULL); |
| 93 |
if (rval < 0) { |
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fprintf(stderr, |
| 95 |
"%s: cannot open view file \"%s\"\n", |
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progname, argv[i]); |
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exit(1); |
| 98 |
} else if (rval == 0) { |
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fprintf(stderr, |
| 100 |
"%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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case 'c': |
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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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case 'n': |
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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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case 'u': |
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case 'b': |
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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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rtargv[rtargc++] = argv[++i]; |
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rtargv[rtargc++] = argv[++i]; |
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} |
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rtargv[rtargc++] = argv[++i]; |
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break; |
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case 'm': |
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rtargv[rtargc++] = argv[i]; |
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if ((argv[i][2] == 'e') | (argv[i][2] == 'a')) { |
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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]; |
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break; |
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default: |
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goto userr; |
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} |
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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]; |
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rtargv[rtargc] = NULL; |
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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, 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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exit(1); |
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} else if (rval == 0) { |
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fprintf(stderr, |
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"%s: cannot get view from picture \"%s\"\n", |
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progname, picture); |
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exit(1); |
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} |
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if (pictview.type == VT_PAR) { |
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fprintf(stderr, "%s: %s: cannot use parallel view\n", |
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progname, picture); |
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exit(1); |
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} |
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if ((err = setview(&pictview)) != NULL) { |
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fprintf(stderr, "%s: %s\n", picture, err); |
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exit(1); |
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} |
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} |
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if (!gotview) { |
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if (picture == NULL) { |
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fprintf(stderr, "%s: must have view or picture\n", |
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progname); |
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exit(1); |
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} |
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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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exit(1); |
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} |
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ourview.type = VT_HEM; |
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ourview.horiz = ourview.vert = 180.0; |
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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); |
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} |
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init(); /* initialize program */ |
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if (threshold <= FTINY) |
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comp_thresh(); /* compute glare threshold */ |
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analyze(); /* analyze view */ |
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if (combine) |
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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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printf("\n"); |
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printsources(); /* print glare sources */ |
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printillum(); /* print illuminances */ |
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exit(0); |
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userr: |
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fprintf(stderr, |
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"Usage: %s [view options][-ga angles][-p picture][[rtrace options] octree]\n", |
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progname); |
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exit(1); |
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} |
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|
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|
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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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|
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if (verbose) |
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fprintf(stderr, "%s: initializing data structures...\n", |
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progname); |
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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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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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nglarangs = i; |
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/* nglardirs = 2*nglarangs + 1; */ |
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/* vsize = sampdens - 1; */ |
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if (nglarangs > 0) |
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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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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)); |
| 292 |
if (indirect == NULL) |
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memerr("indirect illuminances"); |
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npixinvw = npixmiss = 0L; |
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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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setview(&rightview); |
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indirect[nglarangs].lcos = |
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indirect[nglarangs].rcos = cos(maxtheta); |
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indirect[nglarangs].rsin = |
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-(indirect[nglarangs].lsin = sin(maxtheta)); |
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indirect[nglarangs].theta = 0.0; |
| 306 |
for (i = 0; i < nglarangs; i++) { |
| 307 |
d = (glarang[nglarangs-1] - glarang[i])*(PI/180.); |
| 308 |
indirect[nglarangs-i-1].lcos = |
| 309 |
indirect[nglarangs+i+1].rcos = cos(d); |
| 310 |
indirect[nglarangs+i+1].rsin = |
| 311 |
-(indirect[nglarangs-i-1].lsin = sin(d)); |
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d = (glarang[nglarangs-1] + glarang[i])*(PI/180.); |
| 313 |
indirect[nglarangs-i-1].rcos = |
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indirect[nglarangs+i+1].lcos = cos(d); |
| 315 |
indirect[nglarangs-i-1].rsin = |
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-(indirect[nglarangs+i+1].lsin = sin(d)); |
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indirect[nglarangs-i-1].theta = (PI/180.)*glarang[i]; |
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indirect[nglarangs+i+1].theta = -(PI/180.)*glarang[i]; |
| 319 |
} |
| 320 |
/* open picture */ |
| 321 |
if (picture != NULL) { |
| 322 |
if (verbose) |
| 323 |
fprintf(stderr, "%s: opening picture file \"%s\"...\n", |
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progname, picture); |
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open_pict(picture); |
| 326 |
} |
| 327 |
/* start rtrace */ |
| 328 |
if (octree != NULL) { |
| 329 |
if (verbose) { |
| 330 |
fprintf(stderr, |
| 331 |
"%s: starting luminance calculation...\n\t", |
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progname); |
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printargs(rtargc, rtargv, stderr); |
| 334 |
} |
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fork_rtrace(rtargv); |
| 336 |
} |
| 337 |
} |
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|
| 339 |
|
| 340 |
static void |
| 341 |
cleanup(void) /* close files, wait for children */ |
| 342 |
{ |
| 343 |
if (verbose) |
| 344 |
fprintf(stderr, "%s: cleaning up... \n", progname); |
| 345 |
if (picture != NULL) |
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close_pict(); |
| 347 |
if (octree != NULL) |
| 348 |
done_rtrace(); |
| 349 |
if (npixinvw < 100*npixmiss) |
| 350 |
fprintf(stderr, "%s: warning -- missing %d%% of samples\n", |
| 351 |
progname, (int)(100L*npixmiss/npixinvw)); |
| 352 |
} |
| 353 |
|
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|
| 355 |
extern int |
| 356 |
compdir( /* compute direction for x,y */ |
| 357 |
FVECT vd, |
| 358 |
int x, |
| 359 |
int y |
| 360 |
) |
| 361 |
{ |
| 362 |
int hl; |
| 363 |
FVECT org; /* dummy variable */ |
| 364 |
|
| 365 |
hl = hlim(y); |
| 366 |
if (x <= -hl) { /* left region */ |
| 367 |
if (x <= -hl-sampdens) |
| 368 |
return(-1); |
| 369 |
return(viewray(org, vd, &leftview, |
| 370 |
(double)(x+hl)/(2*sampdens)+.5, |
| 371 |
(double)y/(2*sampdens)+.5)); |
| 372 |
} |
| 373 |
if (x >= hl) { /* right region */ |
| 374 |
if (x >= hl+sampdens) |
| 375 |
return(-1); |
| 376 |
return(viewray(org, vd, &rightview, |
| 377 |
(double)(x-hl)/(2*sampdens)+.5, |
| 378 |
(double)y/(2*sampdens)+.5)); |
| 379 |
} |
| 380 |
/* central region */ |
| 381 |
if (viewray(org, vd, &ourview, .5, (double)y/(2*sampdens)+.5) < 0) |
| 382 |
return(-1); |
| 383 |
spinvector(vd, vd, ourview.vup, h_theta(x,y)); |
| 384 |
return(0); |
| 385 |
} |
| 386 |
|
| 387 |
|
| 388 |
extern double |
| 389 |
pixsize( /* return the solid angle of pixel at (x,y) */ |
| 390 |
int x, |
| 391 |
int y |
| 392 |
) |
| 393 |
{ |
| 394 |
register int hl, xo; |
| 395 |
double disc; |
| 396 |
|
| 397 |
hl = hlim(y); |
| 398 |
if (x < -hl) |
| 399 |
xo = x+hl; |
| 400 |
else if (x > hl) |
| 401 |
xo = x-hl; |
| 402 |
else |
| 403 |
xo = 0; |
| 404 |
disc = 1. - (double)((long)xo*xo + (long)y*y)/((long)sampdens*sampdens); |
| 405 |
if (disc <= FTINY*FTINY) |
| 406 |
return(0.); |
| 407 |
return(1./(sampdens*sampdens*sqrt(disc))); |
| 408 |
} |
| 409 |
|
| 410 |
|
| 411 |
extern void |
| 412 |
memerr( /* malloc failure */ |
| 413 |
char *s |
| 414 |
) |
| 415 |
{ |
| 416 |
fprintf(stderr, "%s: out of memory for %s\n", progname, s); |
| 417 |
exit(1); |
| 418 |
} |
| 419 |
|
| 420 |
|
| 421 |
static void |
| 422 |
printsources(void) /* print out glare sources */ |
| 423 |
{ |
| 424 |
register struct source *sp; |
| 425 |
|
| 426 |
printf("BEGIN glare source\n"); |
| 427 |
for (sp = donelist; sp != NULL; sp = sp->next) |
| 428 |
printf("\t%f %f %f\t%f\t%f\n", |
| 429 |
sp->dir[0], sp->dir[1], sp->dir[2], |
| 430 |
sp->dom, sp->brt); |
| 431 |
printf("END glare source\n"); |
| 432 |
} |
| 433 |
|
| 434 |
|
| 435 |
static void |
| 436 |
printillum(void) /* print out indirect illuminances */ |
| 437 |
{ |
| 438 |
register int i; |
| 439 |
|
| 440 |
printf("BEGIN indirect illuminance\n"); |
| 441 |
for (i = 0; i < nglardirs; i++) |
| 442 |
if (indirect[i].n > FTINY) |
| 443 |
printf("\t%.0f\t%f\n", (180.0/PI)*indirect[i].theta, |
| 444 |
PI * indirect[i].sum / indirect[i].n); |
| 445 |
printf("END indirect illuminance\n"); |
| 446 |
} |
