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greg |
2.1 |
/* Copyright (c) 1994 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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#endif |
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/* |
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* Convert Radiance scene description to MGF |
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*/ |
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#include <stdio.h> |
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#include <string.h> |
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#include "fvect.h" |
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#include "object.h" |
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#include "color.h" |
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#include "lookup.h" |
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int o_face(), o_cone(), o_sphere(), o_ring(), o_cylinder(); |
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int o_instance(), o_source(), o_illum(); |
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int o_plastic(), o_metal(), o_glass(), o_mirror(), o_trans(), o_light(); |
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extern void free(); |
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extern char *malloc(); |
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LUTAB rmats = LU_SINIT(free,NULL); /* defined material table */ |
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LUTAB rdispatch = LU_SINIT(NULL,NULL); /* function dispatch table */ |
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char curmat[80]; /* current material */ |
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double unit_mult = 1.; /* units multiplier */ |
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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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int i; |
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for (i = 1; i < argc && argv[i][0] == '-'; i++) |
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switch (argv[i][1]) { |
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case 'd': /* units */ |
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switch (argv[i][2]) { |
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case 'm': /* meters */ |
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unit_mult = 1.; |
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break; |
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case 'c': /* centimeters */ |
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unit_mult = .01; |
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break; |
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case 'f': /* feet */ |
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unit_mult = 12.*.0254; |
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break; |
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case 'i': /* inches */ |
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unit_mult = .0254; |
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break; |
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default: |
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goto unkopt; |
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} |
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break; |
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} |
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init(); |
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if (i >= argc) |
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rad2mgf(NULL); |
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else |
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for ( ; i < argc; i++) |
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rad2mgf(argv[i]); |
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uninit(); |
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exit(0); |
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unkopt: |
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fprintf(stderr, "Usage: %s [-d{m|c|f|i}] file ..\n", argv[0]); |
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exit(1); |
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} |
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rad2mgf(inp) /* convert a Radiance file to MGF */ |
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char *inp; |
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{ |
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#define mod buf |
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#define typ (buf+128) |
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#define id (buf+256) |
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#define alias (buf+384) |
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char buf[512]; |
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FUNARGS fa; |
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register FILE *fp; |
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register int c; |
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if (inp == NULL) { |
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inp = "the standard input"; |
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fp = stdin; |
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} else if (inp[0] == '!') { |
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if ((fp = popen(inp+1, "r")) == NULL) { |
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fputs(inp, stderr); |
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fputs(": cannot execute\n", stderr); |
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exit(1); |
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} |
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} else if ((fp = fopen(inp, "r")) == NULL) { |
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fputs(inp, stderr); |
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fputs(": cannot open\n", stderr); |
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exit(1); |
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} |
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printf("# Begin conversion from: %s\n", inp); |
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while ((c = getc(fp)) != EOF) |
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switch (c) { |
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case ' ': /* white space */ |
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case '\t': |
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case '\n': |
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case '\r': |
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case '\f': |
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break; |
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case '#': /* comment */ |
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if (fgets(buf, sizeof(buf), fp) != NULL) |
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printf("# %s", buf); |
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break; |
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case '!': /* inline command */ |
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ungetc(c, fp); |
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fgetline(buf, sizeof(buf), fp); |
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rad2mgf(buf); |
| 118 |
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break; |
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default: /* Radiance primitive */ |
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ungetc(c, fp); |
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if (fscanf(fp, "%s %s %s", mod, typ, id) != 3) { |
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fputs(inp, stderr); |
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fputs(": unexpected EOF\n", stderr); |
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exit(1); |
| 125 |
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} |
| 126 |
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if (!strcmp(typ, "alias")) { |
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strcpy(alias, "EOF"); |
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fscanf(fp, "%s", alias); |
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newmat(id, alias); |
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} else { |
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if (!readfargs(&fa, fp)) { |
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fprintf(stderr, |
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"%s: bad argument syntax for %s \"%s\"\n", |
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inp, typ, id); |
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exit(1); |
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} |
| 137 |
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cvtprim(inp, mod, typ, id, &fa); |
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freefargs(&fa); |
| 139 |
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} |
| 140 |
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break; |
| 141 |
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} |
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printf("# End conversion from: %s\n", inp); |
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if (inp[0] == '!') |
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pclose(fp); |
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else |
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fclose(fp); |
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#undef mod |
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#undef typ |
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#undef id |
| 150 |
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#undef alias |
| 151 |
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} |
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cvtprim(inp, mod, typ, id, fa) /* process Radiance primitive */ |
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char *inp, *mod, *typ, *id; |
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FUNARGS *fa; |
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{ |
| 158 |
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int (*df)(); |
| 159 |
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| 160 |
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df = (int (*)())lu_find(&rdispatch, typ)->data; |
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if (df != NULL) { /* convert */ |
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if ((*df)(mod, typ, id, fa) < 0) { |
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fprintf(stderr, "%s: bad %s \"%s\"\n", typ, id); |
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exit(1); |
| 165 |
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} |
| 166 |
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} else if (lu_find(&rmats, mod)->data != NULL) /* make alias */ |
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newmat(id, mod); |
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} |
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| 171 |
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newmat(id, alias) /* add a modifier to the alias list */ |
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char *id; |
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char *alias; |
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{ |
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register LUENT *lp, *lpa; |
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if (alias != NULL) { /* look up alias */ |
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if ((lpa = lu_find(&rmats, alias)) == NULL) |
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goto memerr; |
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if (lpa->data == NULL) |
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alias = NULL; /* doesn't exist! */ |
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} |
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if ((lp = lu_find(&rmats, id)) == NULL) /* look up material */ |
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goto memerr; |
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if (alias != NULL && lp->data == lpa->key) |
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return; /* alias set already */ |
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if (lp->data == NULL) { /* allocate material */ |
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if ((lp->key = (char *)malloc(strlen(id)+1)) == NULL) |
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goto memerr; |
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strcpy(lp->key, id); |
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} |
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if (alias == NULL) { /* set this material */ |
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lp->data = lp->key; |
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printf("m %s =\n", id); |
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} else { /* set this alias */ |
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lp->data = lpa->key; |
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printf("m %s = %s\n", id, alias); |
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} |
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strcpy(curmat, id); |
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return; |
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memerr: |
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fputs("Out of memory in newmat!\n", stderr); |
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exit(1); |
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} |
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| 207 |
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setmat(id) /* set material to this one */ |
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char *id; |
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{ |
| 210 |
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if (!strcmp(id, curmat)) /* already set? */ |
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return; |
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printf("m %s\n", id); |
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strcpy(curmat, id); |
| 214 |
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} |
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init() /* initialize dispatch table and output */ |
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{ |
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lu_init(&rdispatch, 22); |
| 220 |
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add2dispatch("polygon", o_face); |
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add2dispatch("cone", o_cone); |
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add2dispatch("cup", o_cone); |
| 223 |
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add2dispatch("sphere", o_sphere); |
| 224 |
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add2dispatch("bubble", o_sphere); |
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add2dispatch("cylinder", o_cylinder); |
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add2dispatch("tube", o_cylinder); |
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add2dispatch("ring", o_ring); |
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add2dispatch("instance", o_instance); |
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add2dispatch("plastic", o_plastic); |
| 230 |
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add2dispatch("plastic2", o_plastic); |
| 231 |
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add2dispatch("metal", o_metal); |
| 232 |
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add2dispatch("metal2", o_metal); |
| 233 |
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add2dispatch("glass", o_glass); |
| 234 |
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add2dispatch("trans", o_trans); |
| 235 |
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add2dispatch("trans2", o_trans); |
| 236 |
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add2dispatch("mirror", o_mirror); |
| 237 |
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add2dispatch("light", o_light); |
| 238 |
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add2dispatch("spotlight", o_light); |
| 239 |
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add2dispatch("glow", o_light); |
| 240 |
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add2dispatch("illum", o_illum); |
| 241 |
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puts("# The following was converted from Radiance scene input"); |
| 242 |
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if (unit_mult < .999 || unit_mult > 1.001) |
| 243 |
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printf("xf -s %.4e\n", unit_mult); |
| 244 |
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} |
| 245 |
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| 246 |
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| 247 |
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uninit() /* mark end of MGF file */ |
| 248 |
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{ |
| 249 |
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if (unit_mult < .999 || unit_mult > 1.001) |
| 250 |
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puts("xf"); |
| 251 |
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puts("# End of data converted from Radiance scene input"); |
| 252 |
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lu_done(&rdispatch); |
| 253 |
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lu_done(&rmats); |
| 254 |
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} |
| 255 |
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| 256 |
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| 257 |
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add2dispatch(name, func) /* add function to dispatch table */ |
| 258 |
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char *name; |
| 259 |
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int (*func)(); |
| 260 |
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{ |
| 261 |
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register LUENT *lp; |
| 262 |
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| 263 |
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lp = lu_find(&rdispatch, name); |
| 264 |
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if (lp->key != NULL) { |
| 265 |
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fputs(name, stderr); |
| 266 |
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fputs(": duplicate dispatch entry!\n", stderr); |
| 267 |
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exit(1); |
| 268 |
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} |
| 269 |
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lp->key = name; |
| 270 |
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lp->data = (char *)func; |
| 271 |
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} |
| 272 |
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| 273 |
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| 274 |
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char VKFMT[] = "%+1.9e %+1.9e %+1.9e"; |
| 275 |
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#define VKLEN 64 |
| 276 |
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| 277 |
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#define mkvkey(k,v) sprintf(k, VKFMT, (v)[0], (v)[1], (v)[2]) |
| 278 |
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| 279 |
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#define NVERTS 256 |
| 280 |
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| 281 |
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long clock; /* incremented at each vertex request */ |
| 282 |
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| 283 |
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struct vert { |
| 284 |
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long lused; /* when last used (0 if unassigned) */ |
| 285 |
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FVECT p; /* track point position only */ |
| 286 |
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} vert[NVERTS]; |
| 287 |
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| 288 |
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LUTAB vertab = LU_SINIT(free,NULL); /* our vertex lookup table */ |
| 289 |
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| 290 |
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| 291 |
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char * |
| 292 |
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getvertid(vp) /* get/set vertex ID for this point */ |
| 293 |
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FVECT vp; |
| 294 |
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{ |
| 295 |
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static char vname[6]; |
| 296 |
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char vkey[VKLEN]; |
| 297 |
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register LUENT *lp; |
| 298 |
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register int i, vndx; |
| 299 |
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| 300 |
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if (!vertab.tsiz && !lu_init(&vertab, NVERTS)) |
| 301 |
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goto memerr; |
| 302 |
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clock++; /* increment counter */ |
| 303 |
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mkvkey(vkey, vp); |
| 304 |
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if ((lp = lu_find(&vertab, vkey)) == NULL) |
| 305 |
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goto memerr; |
| 306 |
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if (lp->data == NULL) { /* allocate new vertex entry */ |
| 307 |
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if (lp->key != NULL) /* reclaim deleted entry */ |
| 308 |
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vertab.ndel--; |
| 309 |
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else { |
| 310 |
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if ((lp->key = (char *)malloc(VKLEN)) == NULL) |
| 311 |
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goto memerr; |
| 312 |
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strcpy(lp->key, vkey); |
| 313 |
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} |
| 314 |
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vndx = 0; /* find oldest vertex */ |
| 315 |
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for (i = 1; i < NVERTS; i++) |
| 316 |
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if (vert[i].lused < vert[vndx].lused) |
| 317 |
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vndx = i; |
| 318 |
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if (vert[vndx].lused) { /* free old entry first */ |
| 319 |
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mkvkey(vkey, vert[vndx].p); |
| 320 |
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lu_delete(&vertab, vkey); |
| 321 |
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} |
| 322 |
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vert[vndx].lused = clock; /* assign it */ |
| 323 |
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VCOPY(vert[vndx].p, vp); |
| 324 |
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printf("v v%d =\np %.15g %.15g %.15g\n", /* print it */ |
| 325 |
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vndx, vp[0], vp[1], vp[2]); |
| 326 |
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lp->data = (char *)&vert[vndx]; /* set it */ |
| 327 |
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} else |
| 328 |
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vndx = (struct vert *)lp->data - vert; |
| 329 |
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sprintf(vname, "v%d", vndx); |
| 330 |
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return(vname); |
| 331 |
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memerr: |
| 332 |
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fputs("Out of memory in getvertid!\n", stderr); |
| 333 |
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exit(1); |
| 334 |
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} |
| 335 |
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| 336 |
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| 337 |
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int |
| 338 |
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o_face(mod, typ, id, fa) /* print out a polygon */ |
| 339 |
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char *mod, *typ, *id; |
| 340 |
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FUNARGS *fa; |
| 341 |
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{ |
| 342 |
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char entbuf[512]; |
| 343 |
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register char *cp1, *cp2; |
| 344 |
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register int i; |
| 345 |
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| 346 |
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if (fa->nfargs < 9 | fa->nfargs % 3) |
| 347 |
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return(-1); |
| 348 |
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setmat(mod); |
| 349 |
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printf("o %s\n", id); |
| 350 |
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cp1 = entbuf; |
| 351 |
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*cp1++ = 'f'; |
| 352 |
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for (i = 0; i < fa->nfargs; i += 3) { |
| 353 |
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cp2 = getvertid(fa->farg + i); |
| 354 |
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*cp1++ = ' '; |
| 355 |
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while ((*cp1 = *cp2++)) |
| 356 |
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cp1++; |
| 357 |
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} |
| 358 |
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puts(entbuf); |
| 359 |
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puts("o"); |
| 360 |
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return(0); |
| 361 |
|
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} |
| 362 |
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| 363 |
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| 364 |
|
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int |
| 365 |
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o_cone(mod, typ, id, fa) /* print out a cone */ |
| 366 |
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char *mod, *typ, *id; |
| 367 |
|
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register FUNARGS *fa; |
| 368 |
|
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{ |
| 369 |
|
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if (fa->nfargs != 8) |
| 370 |
|
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return(-1); |
| 371 |
|
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setmat(mod); |
| 372 |
|
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printf("o %s\n", id); |
| 373 |
|
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printf("v cv1 =\np %.12g %.12g %.12g\n", |
| 374 |
|
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fa->farg[0], fa->farg[1], fa->farg[2]); |
| 375 |
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printf("v cv2 =\np %.12g %.12g %.12g\n", |
| 376 |
|
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fa->farg[3], fa->farg[4], fa->farg[5]); |
| 377 |
|
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if (typ[1] == 'u') /* cup -> inverted cone */ |
| 378 |
|
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printf("cone cv1 %.12g cv2 %.12g\n", |
| 379 |
|
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-fa->farg[6], -fa->farg[7]); |
| 380 |
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else |
| 381 |
|
|
printf("cone cv1 %.12g cv2 %.12g\n", |
| 382 |
|
|
fa->farg[6], fa->farg[7]); |
| 383 |
|
|
puts("o"); |
| 384 |
|
|
return(0); |
| 385 |
|
|
} |
| 386 |
|
|
|
| 387 |
|
|
|
| 388 |
|
|
int |
| 389 |
|
|
o_sphere(mod, typ, id, fa) /* print out a sphere */ |
| 390 |
|
|
char *mod, *typ, *id; |
| 391 |
|
|
register FUNARGS *fa; |
| 392 |
|
|
{ |
| 393 |
|
|
if (fa->nfargs != 4) |
| 394 |
|
|
return(-1); |
| 395 |
|
|
setmat(mod); |
| 396 |
|
|
printf("o %s\n", id); |
| 397 |
|
|
printf("v cent =\np %.12g %.12g %.12g\n", |
| 398 |
|
|
fa->farg[0], fa->farg[1], fa->farg[2]); |
| 399 |
|
|
printf("sph cent %.12g\n", typ[0]=='b' ? -fa->farg[3] : fa->farg[3]); |
| 400 |
|
|
puts("o"); |
| 401 |
|
|
return(0); |
| 402 |
|
|
} |
| 403 |
|
|
|
| 404 |
|
|
|
| 405 |
|
|
int |
| 406 |
|
|
o_cylinder(mod, typ, id, fa) /* print out a cylinder */ |
| 407 |
|
|
char *mod, *typ, *id; |
| 408 |
|
|
register FUNARGS *fa; |
| 409 |
|
|
{ |
| 410 |
|
|
if (fa->nfargs != 7) |
| 411 |
|
|
return(-1); |
| 412 |
|
|
setmat(mod); |
| 413 |
|
|
printf("o %s\n", id); |
| 414 |
|
|
printf("v cv1 =\np %.12g %.12g %.12g\n", |
| 415 |
|
|
fa->farg[0], fa->farg[1], fa->farg[2]); |
| 416 |
|
|
printf("v cv2 =\np %.12g %.12g %.12g\n", |
| 417 |
|
|
fa->farg[3], fa->farg[4], fa->farg[5]); |
| 418 |
|
|
printf("cyl cv1 %.12g cv2\n", |
| 419 |
|
|
typ[0]=='t' ? -fa->farg[6] : fa->farg[6]); |
| 420 |
|
|
puts("o"); |
| 421 |
|
|
return(0); |
| 422 |
|
|
} |
| 423 |
|
|
|
| 424 |
|
|
|
| 425 |
|
|
int |
| 426 |
|
|
o_ring(mod, typ, id, fa) /* print out a ring */ |
| 427 |
|
|
char *mod, *typ, *id; |
| 428 |
|
|
register FUNARGS *fa; |
| 429 |
|
|
{ |
| 430 |
|
|
if (fa->nfargs != 8) |
| 431 |
|
|
return(-1); |
| 432 |
|
|
setmat(mod); |
| 433 |
|
|
printf("o %s\n", id); |
| 434 |
|
|
printf("v cent =\np %.12g %.12g %.12g\n", |
| 435 |
|
|
fa->farg[0], fa->farg[1], fa->farg[2]); |
| 436 |
|
|
printf("n %.12g %.12g %.12g\n", |
| 437 |
|
|
fa->farg[3], fa->farg[4], fa->farg[5]); |
| 438 |
|
|
if (fa->farg[6] < fa->farg[7]) |
| 439 |
|
|
printf("ring cent %.12g %.12g\n", |
| 440 |
|
|
fa->farg[6], fa->farg[7]); |
| 441 |
|
|
else |
| 442 |
|
|
printf("ring cent %.12g %.12g\n", |
| 443 |
|
|
fa->farg[7], fa->farg[6]); |
| 444 |
|
|
puts("o"); |
| 445 |
|
|
return(0); |
| 446 |
|
|
} |
| 447 |
|
|
|
| 448 |
|
|
|
| 449 |
|
|
int |
| 450 |
|
|
o_instance(mod, typ, id, fa) /* convert an instance */ |
| 451 |
|
|
char *mod, *typ, *id; |
| 452 |
|
|
FUNARGS *fa; |
| 453 |
|
|
{ |
| 454 |
|
|
return(0); /* this is too damned difficult! */ |
| 455 |
|
|
} |
| 456 |
|
|
|
| 457 |
|
|
|
| 458 |
|
|
int |
| 459 |
|
|
o_source(mod, typ, id, fa) /* convert a source */ |
| 460 |
|
|
char *mod, *typ, *id; |
| 461 |
|
|
FUNARGS *fa; |
| 462 |
|
|
{ |
| 463 |
|
|
return(0); /* there is no MGF equivalent! */ |
| 464 |
|
|
} |
| 465 |
|
|
|
| 466 |
|
|
|
| 467 |
|
|
int |
| 468 |
|
|
o_illum(mod, typ, id, fa) /* convert an illum material */ |
| 469 |
|
|
char *mod, *typ, *id; |
| 470 |
|
|
FUNARGS *fa; |
| 471 |
|
|
{ |
| 472 |
|
|
if (fa->nsargs == 1 && strcmp(fa->sarg[0], VOIDID)) { |
| 473 |
|
|
newmat(id, fa->sarg[0]); /* just create alias */ |
| 474 |
|
|
return(0); |
| 475 |
|
|
} |
| 476 |
|
|
/* else create invisible material */ |
| 477 |
|
|
newmat(id, NULL); |
| 478 |
|
|
puts("ts 1 0"); |
| 479 |
|
|
return(0); |
| 480 |
|
|
} |
| 481 |
|
|
|
| 482 |
|
|
|
| 483 |
|
|
int |
| 484 |
|
|
o_plastic(mod, typ, id, fa) /* convert a plastic material */ |
| 485 |
|
|
char *mod, *typ, *id; |
| 486 |
|
|
register FUNARGS *fa; |
| 487 |
|
|
{ |
| 488 |
|
|
COLOR cxyz, rrgb; |
| 489 |
|
|
double d; |
| 490 |
|
|
|
| 491 |
|
|
if (fa->nfargs != (typ[7]=='2' ? 6 : 5)) |
| 492 |
|
|
return(-1); |
| 493 |
|
|
newmat(id, NULL); |
| 494 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
| 495 |
|
|
rgb_cie(cxyz, rrgb); |
| 496 |
|
|
puts("c"); /* put diffuse component */ |
| 497 |
|
|
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 498 |
|
|
if (d > FTINY) |
| 499 |
|
|
printf("cxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
| 500 |
|
|
printf("rd %.4f\n", cxyz[1]*(1. - fa->farg[3])); |
| 501 |
|
|
puts("c"); /* put specular component */ |
| 502 |
|
|
printf("rs %.4f %.4f\n", fa->farg[3], |
| 503 |
|
|
typ[7]=='2' ? .5*(fa->farg[4] + fa->farg[5]) : |
| 504 |
|
|
fa->farg[4]); |
| 505 |
|
|
return(0); |
| 506 |
|
|
} |
| 507 |
|
|
|
| 508 |
|
|
|
| 509 |
|
|
int |
| 510 |
|
|
o_metal(mod, typ, id, fa) /* convert a metal material */ |
| 511 |
|
|
char *mod, *typ, *id; |
| 512 |
|
|
register FUNARGS *fa; |
| 513 |
|
|
{ |
| 514 |
|
|
COLOR cxyz, rrgb; |
| 515 |
|
|
double d; |
| 516 |
|
|
|
| 517 |
|
|
if (fa->nfargs != (typ[5]=='2' ? 6 : 5)) |
| 518 |
|
|
return(-1); |
| 519 |
|
|
newmat(id, NULL); |
| 520 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
| 521 |
|
|
rgb_cie(cxyz, rrgb); |
| 522 |
|
|
puts("c"); /* put diffuse component */ |
| 523 |
|
|
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 524 |
|
|
if (d > FTINY) |
| 525 |
|
|
printf("cxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
| 526 |
|
|
printf("rd %.4f\n", cxyz[1]*(1. - fa->farg[3])); |
| 527 |
|
|
/* put specular component */ |
| 528 |
|
|
printf("rs %.4f %.4f\n", cxyz[1]*fa->farg[3], |
| 529 |
|
|
typ[5]=='2' ? .5*(fa->farg[4] + fa->farg[5]) : |
| 530 |
|
|
fa->farg[4]); |
| 531 |
|
|
return(0); |
| 532 |
|
|
} |
| 533 |
|
|
|
| 534 |
|
|
|
| 535 |
|
|
int |
| 536 |
|
|
o_glass(mod, typ, id, fa) /* convert a glass material */ |
| 537 |
|
|
char *mod, *typ, *id; |
| 538 |
|
|
register FUNARGS *fa; |
| 539 |
|
|
{ |
| 540 |
|
|
COLOR cxyz, rrgb, trgb; |
| 541 |
|
|
double nrfr = 1.52, F, d; |
| 542 |
|
|
register int i; |
| 543 |
|
|
|
| 544 |
|
|
if (fa->nfargs != 3 && fa->nfargs != 4) |
| 545 |
|
|
return(-1); |
| 546 |
|
|
newmat(id, NULL); |
| 547 |
|
|
if (fa->nfargs == 4) |
| 548 |
|
|
nrfr = fa->farg[3]; |
| 549 |
|
|
F = (1. - nrfr)/(1. + nrfr); /* use normal incidence */ |
| 550 |
|
|
F *= F; |
| 551 |
|
|
for (i = 0; i < 3; i++) { |
| 552 |
|
|
rrgb[i] = (1. - F)*(1. - F)/(1. - F*F*fa->farg[i]*fa->farg[i]); |
| 553 |
|
|
trgb[i] = F * (1. + (1. - 2.*F)*fa->farg[i]) / |
| 554 |
|
|
(1. - F*F*fa->farg[i]*fa->farg[i]); |
| 555 |
|
|
} |
| 556 |
|
|
rgb_cie(cxyz, rrgb); /* put reflected component */ |
| 557 |
|
|
puts("c"); |
| 558 |
|
|
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 559 |
|
|
if (d > FTINY) |
| 560 |
|
|
printf("cxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
| 561 |
|
|
printf("rs %.4f 0\n", cxyz[1]); |
| 562 |
|
|
rgb_cie(cxyz, trgb); /* put transmitted component */ |
| 563 |
|
|
puts("c"); |
| 564 |
|
|
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 565 |
|
|
if (d > FTINY) |
| 566 |
|
|
printf("cxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
| 567 |
|
|
printf("ts %.4f 0\n", cxyz[1]); |
| 568 |
|
|
return(0); |
| 569 |
|
|
} |
| 570 |
|
|
|
| 571 |
|
|
|
| 572 |
|
|
int |
| 573 |
|
|
o_mirror(mod, typ, id, fa) /* convert a mirror material */ |
| 574 |
|
|
char *mod, *typ, *id; |
| 575 |
|
|
register FUNARGS *fa; |
| 576 |
|
|
{ |
| 577 |
|
|
COLOR cxyz, rrgb; |
| 578 |
|
|
double d; |
| 579 |
|
|
|
| 580 |
|
|
if (fa->nsargs == 1) { /* use alternate material */ |
| 581 |
|
|
newmat(id, fa->sarg[0]); |
| 582 |
|
|
return(0); |
| 583 |
|
|
} |
| 584 |
|
|
if (fa->nfargs != 3) |
| 585 |
|
|
return(-1); |
| 586 |
|
|
newmat(id, NULL); |
| 587 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
| 588 |
|
|
rgb_cie(cxyz, rrgb); |
| 589 |
|
|
puts("c"); /* put specular component */ |
| 590 |
|
|
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 591 |
|
|
if (d > FTINY) |
| 592 |
|
|
printf("cxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
| 593 |
|
|
printf("rs %.4f 0\n", cxyz[1]); |
| 594 |
|
|
return(0); |
| 595 |
|
|
} |
| 596 |
|
|
|
| 597 |
|
|
|
| 598 |
|
|
int |
| 599 |
|
|
o_trans(mod, typ, id, fa) /* convert a trans material */ |
| 600 |
|
|
char *mod, *typ, *id; |
| 601 |
|
|
register FUNARGS *fa; |
| 602 |
|
|
{ |
| 603 |
|
|
COLOR cxyz, rrgb; |
| 604 |
|
|
double rough, trans, tspec, d; |
| 605 |
|
|
|
| 606 |
|
|
if (typ[4] == '2') { /* trans2 */ |
| 607 |
|
|
if (fa->nfargs != 8) |
| 608 |
|
|
return(-1); |
| 609 |
|
|
rough = .5*(fa->farg[4] + fa->farg[5]); |
| 610 |
|
|
trans = fa->farg[6]; |
| 611 |
|
|
tspec = fa->farg[7]; |
| 612 |
|
|
} else { /* trans */ |
| 613 |
|
|
if (fa->nfargs != 7) |
| 614 |
|
|
return(-1); |
| 615 |
|
|
rough = fa->farg[4]; |
| 616 |
|
|
trans = fa->farg[5]; |
| 617 |
|
|
tspec = fa->farg[6]; |
| 618 |
|
|
} |
| 619 |
|
|
newmat(id, NULL); |
| 620 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
| 621 |
|
|
rgb_cie(cxyz, rrgb); |
| 622 |
|
|
puts("c"); /* put transmitted diffuse */ |
| 623 |
|
|
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 624 |
|
|
if (d > FTINY) |
| 625 |
|
|
printf("cxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
| 626 |
|
|
printf("td %.4f\n", cxyz[1]*trans*(1. - fa->farg[3])*(1. - tspec)); |
| 627 |
|
|
/* put transmitted specular */ |
| 628 |
|
|
printf("ts %.4f %.4f\n", cxyz[1]*trans*tspec*(1. - fa->farg[3]), rough); |
| 629 |
|
|
/* put reflected diffuse */ |
| 630 |
|
|
printf("rd %.4f\n", cxyz[1]*(1. - fa->farg[3])*(1. - trans)); |
| 631 |
|
|
puts("c"); /* put reflected specular */ |
| 632 |
|
|
printf("rs %.4f %.4f\n", fa->farg[3], rough); |
| 633 |
|
|
return(0); |
| 634 |
|
|
} |
| 635 |
|
|
|
| 636 |
|
|
|
| 637 |
|
|
int |
| 638 |
|
|
o_light(mod, typ, id, fa) /* convert a light type */ |
| 639 |
|
|
char *mod, *typ, *id; |
| 640 |
|
|
register FUNARGS *fa; |
| 641 |
|
|
{ |
| 642 |
|
|
COLOR cxyz, rrgb; |
| 643 |
|
|
double d; |
| 644 |
|
|
|
| 645 |
|
|
if (fa->nfargs < 3) |
| 646 |
|
|
return(-1); |
| 647 |
|
|
newmat(id, NULL); |
| 648 |
|
|
rrgb[0] = fa->farg[0]; rrgb[1] = fa->farg[1]; rrgb[2] = fa->farg[2]; |
| 649 |
|
|
rgb_cie(cxyz, rrgb); |
| 650 |
|
|
d = cxyz[0] + cxyz[1] + cxyz[2]; |
| 651 |
|
|
puts("c"); |
| 652 |
|
|
if (d > FTINY) |
| 653 |
|
|
printf("cxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); |
| 654 |
|
|
printf("ed %.4g\n", cxyz[1]); |
| 655 |
|
|
return(0); |
| 656 |
|
|
} |
