| 1 |
#ifndef lint
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| 2 |
static const char RCSid[] = "$Id: findglare.c,v 2.14 2014/07/29 21:36:08 greg Exp $";
|
| 3 |
#endif
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| 4 |
/*
|
| 5 |
* Find glare sources in a scene or image.
|
| 6 |
*
|
| 7 |
* Greg Ward March 1991
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| 8 |
*/
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| 9 |
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| 10 |
#include "glare.h"
|
| 11 |
|
| 12 |
char *rtargv[64] = {"rtrace", "-h-", "-ov", "-fff", "-ld-", "-i-", "-I-"};
|
| 13 |
int rtargc = 7;
|
| 14 |
|
| 15 |
VIEW ourview = STDVIEW; /* our view */
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| 16 |
VIEW pictview = STDVIEW; /* picture view */
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| 17 |
VIEW leftview, rightview; /* leftmost and rightmost views */
|
| 18 |
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| 19 |
char *picture = NULL; /* picture file name */
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| 20 |
char *octree = NULL; /* octree file name */
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| 21 |
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| 22 |
int verbose = 0; /* verbose reporting */
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| 23 |
char *progname; /* global argv[0] */
|
| 24 |
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| 25 |
double threshold = 0.; /* glare threshold */
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| 26 |
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| 27 |
int sampdens = SAMPDENS; /* sample density */
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| 28 |
ANGLE glarang[180] = {AEND}; /* glare calculation angles */
|
| 29 |
int nglarangs = 0;
|
| 30 |
double maxtheta; /* maximum angle (in radians) */
|
| 31 |
int hsize; /* horizontal size */
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| 32 |
|
| 33 |
struct illum *indirect; /* array of indirect illuminances */
|
| 34 |
|
| 35 |
long npixinvw; /* number of pixels in view */
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| 36 |
long npixmiss; /* number of pixels missed */
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| 37 |
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| 38 |
static int angcmp(const void *ap1, const void *ap2);
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| 39 |
static void init(void);
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| 40 |
static void cleanup(void);
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| 41 |
static void printsources(void);
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| 42 |
static void printillum(void);
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| 43 |
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| 44 |
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| 45 |
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| 46 |
int
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| 47 |
main(
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| 48 |
int argc,
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| 49 |
char *argv[]
|
| 50 |
)
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| 51 |
{
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| 52 |
int combine = 1;
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| 53 |
int gotview = 0;
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| 54 |
int rval, i;
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| 55 |
char *err;
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| 56 |
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| 57 |
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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| 61 |
while ((rval = expandarg(&argc, &argv, i)) > 0)
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;
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| 63 |
if (rval < 0) {
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fprintf(stderr, "%s: cannot expand '%s'\n",
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| 65 |
argv[0], argv[i]);
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| 66 |
exit(1);
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| 67 |
}
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rval = getviewopt(&ourview, argc-i, argv+i);
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| 69 |
if (rval >= 0) {
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| 70 |
i += rval;
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gotview++;
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| 72 |
continue;
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| 73 |
}
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switch (argv[i][1]) {
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| 75 |
case 't':
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| 76 |
threshold = atof(argv[++i]);
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| 77 |
break;
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case 'r':
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| 79 |
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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}
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if (argv[i][2] != 'f')
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goto userr;
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| 88 |
rval = viewfile(argv[++i], &ourview, NULL);
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| 89 |
if (rval < 0) {
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| 90 |
fprintf(stderr,
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| 91 |
"%s: cannot open view file \"%s\"\n",
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| 92 |
progname, argv[i]);
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| 93 |
exit(1);
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| 94 |
} else if (rval == 0) {
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| 95 |
fprintf(stderr,
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| 96 |
"%s: bad view file \"%s\"\n",
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| 97 |
progname, argv[i]);
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| 98 |
exit(1);
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} else
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gotview++;
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break;
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| 102 |
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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| 141 |
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 && !VABSEQ(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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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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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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| 258 |
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| 259 |
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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| 264 |
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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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| 273 |
fprintf(stderr, "%s: glare angles must be between 1 and 180\n",
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| 274 |
progname);
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| 275 |
exit(1);
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}
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| 277 |
nglarangs = i;
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| 278 |
/* nglardirs = 2*nglarangs + 1; */
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| 279 |
/* vsize = sampdens - 1; */
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| 280 |
if (nglarangs > 0)
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| 281 |
maxtheta = (PI/180.)*glarang[nglarangs-1];
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| 282 |
else
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maxtheta = 0.0;
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| 284 |
hsize = hlim(0) + sampdens - 1;
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| 285 |
if (hsize > (int)(PI*sampdens))
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| 286 |
hsize = PI*sampdens;
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| 287 |
indirect = (struct illum *)calloc(nglardirs, sizeof(struct illum));
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| 288 |
if (indirect == NULL)
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| 289 |
memerr("indirect illuminances");
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| 290 |
npixinvw = npixmiss = 0L;
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| 291 |
leftview = ourview;
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| 292 |
rightview = ourview;
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| 293 |
spinvector(leftview.vdir, ourview.vdir, ourview.vup, maxtheta);
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| 294 |
spinvector(rightview.vdir, ourview.vdir, ourview.vup, -maxtheta);
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| 295 |
setview(&leftview);
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| 296 |
setview(&rightview);
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| 297 |
indirect[nglarangs].lcos =
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| 298 |
indirect[nglarangs].rcos = cos(maxtheta);
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| 299 |
indirect[nglarangs].rsin =
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| 300 |
-(indirect[nglarangs].lsin = sin(maxtheta));
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| 301 |
indirect[nglarangs].theta = 0.0;
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| 302 |
for (i = 0; i < nglarangs; i++) {
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| 303 |
d = (glarang[nglarangs-1] - glarang[i])*(PI/180.);
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| 304 |
indirect[nglarangs-i-1].lcos =
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| 305 |
indirect[nglarangs+i+1].rcos = cos(d);
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| 306 |
indirect[nglarangs+i+1].rsin =
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| 307 |
-(indirect[nglarangs-i-1].lsin = sin(d));
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| 308 |
d = (glarang[nglarangs-1] + glarang[i])*(PI/180.);
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| 309 |
indirect[nglarangs-i-1].rcos =
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| 310 |
indirect[nglarangs+i+1].lcos = cos(d);
|
| 311 |
indirect[nglarangs-i-1].rsin =
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| 312 |
-(indirect[nglarangs+i+1].lsin = sin(d));
|
| 313 |
indirect[nglarangs-i-1].theta = (PI/180.)*glarang[i];
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| 314 |
indirect[nglarangs+i+1].theta = -(PI/180.)*glarang[i];
|
| 315 |
}
|
| 316 |
/* open picture */
|
| 317 |
if (picture != NULL) {
|
| 318 |
if (verbose)
|
| 319 |
fprintf(stderr, "%s: opening picture file \"%s\"...\n",
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| 320 |
progname, picture);
|
| 321 |
open_pict(picture);
|
| 322 |
}
|
| 323 |
/* start rtrace */
|
| 324 |
if (octree != NULL) {
|
| 325 |
if (verbose) {
|
| 326 |
fprintf(stderr,
|
| 327 |
"%s: starting luminance calculation...\n\t",
|
| 328 |
progname);
|
| 329 |
printargs(rtargc, rtargv, stderr);
|
| 330 |
}
|
| 331 |
fork_rtrace(rtargv);
|
| 332 |
}
|
| 333 |
}
|
| 334 |
|
| 335 |
|
| 336 |
static void
|
| 337 |
cleanup(void) /* close files, wait for children */
|
| 338 |
{
|
| 339 |
if (verbose)
|
| 340 |
fprintf(stderr, "%s: cleaning up... \n", progname);
|
| 341 |
if (picture != NULL)
|
| 342 |
close_pict();
|
| 343 |
if (octree != NULL)
|
| 344 |
done_rtrace();
|
| 345 |
if (npixinvw < 100*npixmiss)
|
| 346 |
fprintf(stderr, "%s: warning -- missing %d%% of samples\n",
|
| 347 |
progname, (int)(100L*npixmiss/npixinvw));
|
| 348 |
}
|
| 349 |
|
| 350 |
|
| 351 |
extern int
|
| 352 |
compdir( /* compute direction for x,y */
|
| 353 |
FVECT vd,
|
| 354 |
int x,
|
| 355 |
int y
|
| 356 |
)
|
| 357 |
{
|
| 358 |
int hl;
|
| 359 |
FVECT org; /* dummy variable */
|
| 360 |
|
| 361 |
hl = hlim(y);
|
| 362 |
if (x <= -hl) { /* left region */
|
| 363 |
if (x <= -hl-sampdens)
|
| 364 |
return(-1);
|
| 365 |
return(viewray(org, vd, &leftview,
|
| 366 |
(double)(x+hl)/(2*sampdens)+.5,
|
| 367 |
(double)y/(2*sampdens)+.5));
|
| 368 |
}
|
| 369 |
if (x >= hl) { /* right region */
|
| 370 |
if (x >= hl+sampdens)
|
| 371 |
return(-1);
|
| 372 |
return(viewray(org, vd, &rightview,
|
| 373 |
(double)(x-hl)/(2*sampdens)+.5,
|
| 374 |
(double)y/(2*sampdens)+.5));
|
| 375 |
}
|
| 376 |
/* central region */
|
| 377 |
if (viewray(org, vd, &ourview, .5, (double)y/(2*sampdens)+.5) < 0)
|
| 378 |
return(-1);
|
| 379 |
spinvector(vd, vd, ourview.vup, h_theta(x,y));
|
| 380 |
return(0);
|
| 381 |
}
|
| 382 |
|
| 383 |
|
| 384 |
extern double
|
| 385 |
pixsize( /* return the solid angle of pixel at (x,y) */
|
| 386 |
int x,
|
| 387 |
int y
|
| 388 |
)
|
| 389 |
{
|
| 390 |
register int hl, xo;
|
| 391 |
double disc;
|
| 392 |
|
| 393 |
hl = hlim(y);
|
| 394 |
if (x < -hl)
|
| 395 |
xo = x+hl;
|
| 396 |
else if (x > hl)
|
| 397 |
xo = x-hl;
|
| 398 |
else
|
| 399 |
xo = 0;
|
| 400 |
disc = 1. - (double)((long)xo*xo + (long)y*y)/((long)sampdens*sampdens);
|
| 401 |
if (disc <= FTINY*FTINY)
|
| 402 |
return(0.);
|
| 403 |
return(1./(sampdens*sampdens*sqrt(disc)));
|
| 404 |
}
|
| 405 |
|
| 406 |
|
| 407 |
extern void
|
| 408 |
memerr( /* malloc failure */
|
| 409 |
char *s
|
| 410 |
)
|
| 411 |
{
|
| 412 |
fprintf(stderr, "%s: out of memory for %s\n", progname, s);
|
| 413 |
exit(1);
|
| 414 |
}
|
| 415 |
|
| 416 |
|
| 417 |
static void
|
| 418 |
printsources(void) /* print out glare sources */
|
| 419 |
{
|
| 420 |
register struct source *sp;
|
| 421 |
|
| 422 |
printf("BEGIN glare source\n");
|
| 423 |
for (sp = donelist; sp != NULL; sp = sp->next)
|
| 424 |
printf("\t%f %f %f\t%f\t%f\n",
|
| 425 |
sp->dir[0], sp->dir[1], sp->dir[2],
|
| 426 |
sp->dom, sp->brt);
|
| 427 |
printf("END glare source\n");
|
| 428 |
}
|
| 429 |
|
| 430 |
|
| 431 |
static void
|
| 432 |
printillum(void) /* print out indirect illuminances */
|
| 433 |
{
|
| 434 |
register int i;
|
| 435 |
|
| 436 |
printf("BEGIN indirect illuminance\n");
|
| 437 |
for (i = 0; i < nglardirs; i++)
|
| 438 |
if (indirect[i].n > FTINY)
|
| 439 |
printf("\t%.0f\t%f\n", (180.0/PI)*indirect[i].theta,
|
| 440 |
PI * indirect[i].sum / indirect[i].n);
|
| 441 |
printf("END indirect illuminance\n");
|
| 442 |
}
|
