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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 MGF (Materials and Geometry Format) to Radiance |
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*/ |
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#include <stdio.h> |
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#include <math.h> |
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#include <string.h> |
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#include "mgflib/parser.h" |
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#include "color.h" |
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#include "tmesh.h" |
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#define putv(v) printf("%18.12g %18.12g %18.12g\n",(v)[0],(v)[1],(v)[2]) |
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#define isgrey(cxy) ((cxy)->cx > .31 && (cxy)->cx < .35 && \ |
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(cxy)->cy > .31 && (cxy)->cy < .35) |
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#define is0vect(v) ((v)[0] == 0. && (v)[1] == 0. && (v)[2] == 0.) |
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#define BIGFLT 1e8 |
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double glowdist = 1.5*BIGFLT; /* glow test distance */ |
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double emult = 1.; /* emmitter multiplier */ |
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int r_comment(), r_cone(), r_cyl(), r_face(), r_ies(), r_ring(), r_sph(); |
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char *material(), *object(), *addarg(); |
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main(argc, argv) /* convert files to stdout */ |
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int argc; |
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char *argv[]; |
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{ |
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int i, rv; |
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/* initialize dispatch table */ |
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mg_ehand[MG_E_COMMENT] = r_comment; |
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mg_ehand[MG_E_COLOR] = c_hcolor; |
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mg_ehand[MG_E_CONE] = r_cone; |
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mg_ehand[MG_E_CXY] = c_hcolor; |
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mg_ehand[MG_E_CYL] = r_cyl; |
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mg_ehand[MG_E_ED] = c_hmaterial; |
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mg_ehand[MG_E_FACE] = r_face; |
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mg_ehand[MG_E_IES] = r_ies; |
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mg_ehand[MG_E_MATERIAL] = c_hmaterial; |
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mg_ehand[MG_E_NORMAL] = c_hvertex; |
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mg_ehand[MG_E_OBJECT] = obj_handler; |
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mg_ehand[MG_E_POINT] = c_hvertex; |
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mg_ehand[MG_E_RD] = c_hmaterial; |
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mg_ehand[MG_E_RING] = r_ring; |
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mg_ehand[MG_E_RS] = c_hmaterial; |
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mg_ehand[MG_E_SPH] = r_sph; |
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mg_ehand[MG_E_TD] = c_hmaterial; |
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mg_ehand[MG_E_TS] = c_hmaterial; |
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mg_ehand[MG_E_VERTEX] = c_hvertex; |
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mg_ehand[MG_E_XF] = xf_handler; |
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mg_init(); /* initialize the parser */ |
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/* get options & print header */ |
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printf("## %s", argv[0]); |
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for (i = 1; i < argc && argv[i][0] == '-'; i++) { |
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printf(" %s", argv[i]); |
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switch (argv[i][1]) { |
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case 'g': /* glow distance (meters) */ |
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if (argv[i][2] || badarg(argc-i, argv+i, "f")) |
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goto userr; |
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glowdist = atof(argv[++i]); |
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printf(" %s", argv[i]); |
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break; |
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case 'e': /* emitter multiplier */ |
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if (argv[i][2] || badarg(argc-i, argv+i, "f")) |
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goto userr; |
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emult = atof(argv[++i]); |
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printf(" %s", 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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putchar('\n'); |
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if (i == argc) { /* convert stdin */ |
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if ((rv = mg_load(NULL)) != MG_OK) |
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exit(1); |
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} else /* convert each file */ |
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for ( ; i < argc; i++) { |
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printf("## %s %s ##############################\n", |
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argv[0], argv[i]); |
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if ((rv = mg_load(argv[i])) != MG_OK) |
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exit(1); |
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} |
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exit(0); |
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userr: |
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fprintf(stderr, "Usage: %s [-g dist][-m mult] [file.mgf] ..\n", |
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argv[0]); |
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exit(1); |
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} |
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int |
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r_comment(ac, av) /* repeat a comment verbatim */ |
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register int ac; |
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register char **av; |
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{ |
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fputs("\n#", stdout); /* use Radiance comment character */ |
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while (--ac) { |
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putchar(' '); |
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fputs(*++av, stdout); |
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} |
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putchar('\n'); |
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return(MG_OK); |
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} |
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int |
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r_cone(ac, av) /* put out a cone */ |
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int ac; |
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char **av; |
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{ |
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static int ncones; |
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char *mat; |
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double r1, r2; |
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C_VERTEX *cv1, *cv2; |
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FVECT p1, p2; |
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int inv; |
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if (ac != 5) |
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return(MG_EARGC); |
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if (!isflt(av[2]) || !isflt(av[4])) |
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return(MG_ETYPE); |
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if ((cv1 = c_getvert(av[1])) == NULL || |
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(cv2 = c_getvert(av[3])) == NULL) |
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return(MG_EUNDEF); |
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xf_xfmpoint(p1, cv1->p); |
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xf_xfmpoint(p2, cv2->p); |
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r1 = xf_scale(atof(av[2])); |
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r2 = xf_scale(atof(av[4])); |
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inv = r1 < 0.; |
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if (r1 == 0.) { |
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if (r2 == 0.) |
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return(MG_EILL); |
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inv = r2 < 0.; |
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} else if (r2 != 0. && inv ^ r2 < 0.) |
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return(MG_EILL); |
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if (inv) { |
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r1 = -r1; |
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r2 = -r2; |
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} |
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if ((mat = material()) == NULL) |
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return(MG_EBADMAT); |
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printf("\n%s %s %sc%d\n", mat, inv ? "cup" : "cone", |
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object(), ++ncones); |
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printf("0\n0\n8\n"); |
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putv(p1); |
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putv(p2); |
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printf("%18.12g %18.12g\n", r1, r2); |
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return(MG_OK); |
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} |
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int |
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r_cyl(ac, av) /* put out a cylinder */ |
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int ac; |
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char **av; |
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{ |
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static int ncyls; |
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char *mat; |
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double rad; |
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C_VERTEX *cv1, *cv2; |
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FVECT p1, p2; |
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int inv; |
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if (ac != 4) |
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return(MG_EARGC); |
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if (!isflt(av[2])) |
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return(MG_ETYPE); |
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if ((cv1 = c_getvert(av[1])) == NULL || |
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(cv2 = c_getvert(av[3])) == NULL) |
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return(MG_EUNDEF); |
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xf_xfmpoint(p1, cv1->p); |
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xf_xfmpoint(p2, cv2->p); |
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rad = xf_scale(atof(av[2])); |
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if ((inv = rad < 0.)) |
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rad = -rad; |
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if ((mat = material()) == NULL) |
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return(MG_EBADMAT); |
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printf("\n%s %s %scy%d\n", mat, inv ? "tube" : "cylinder", |
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object(), ++ncyls); |
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printf("0\n0\n7\n"); |
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putv(p1); |
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putv(p2); |
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printf("%18.12g\n", rad); |
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return(MG_OK); |
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} |
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int |
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r_sph(ac, av) /* put out a sphere */ |
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int ac; |
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char **av; |
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{ |
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static int nsphs; |
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char *mat; |
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double rad; |
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C_VERTEX *cv; |
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FVECT cent; |
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int inv; |
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if (ac != 3) |
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return(MG_EARGC); |
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if (!isflt(av[2])) |
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return(MG_ETYPE); |
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if ((cv = c_getvert(av[1])) == NULL) |
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return(MG_EUNDEF); |
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xf_xfmpoint(cent, cv->p); |
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rad = xf_scale(atof(av[2])); |
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if ((inv = rad < 0.)) |
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rad = -rad; |
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if ((mat = material()) == NULL) |
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return(MG_EBADMAT); |
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printf("\n%s %s %ss%d\n", mat, inv ? "bubble" : "sphere", |
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object(), ++nsphs); |
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printf("0\n0\n4 %18.12g %18.12g %18.12g %18.12g\n", |
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cent[0], cent[1], cent[2], rad); |
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return(MG_OK); |
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} |
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int |
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r_ring(ac, av) /* put out a ring */ |
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int ac; |
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char **av; |
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{ |
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static int nrings; |
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char *mat; |
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double r1, r2; |
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C_VERTEX *cv; |
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FVECT cent, norm; |
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if (ac != 4) |
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return(MG_EARGC); |
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if (!isflt(av[2]) || !isflt(av[3])) |
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return(MG_ETYPE); |
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if ((cv = c_getvert(av[1])) == NULL) |
| 247 |
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return(MG_EUNDEF); |
| 248 |
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if (is0vect(cv->n)) |
| 249 |
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return(MG_EILL); |
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xf_xfmpoint(cent, cv->p); |
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xf_rotvect(norm, cv->n); |
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r1 = xf_scale(atof(av[2])); |
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r2 = xf_scale(atof(av[3])); |
| 254 |
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if (r1 < 0. | r2 <= r1) |
| 255 |
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return(MG_EILL); |
| 256 |
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if ((mat = material()) == NULL) |
| 257 |
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return(MG_EBADMAT); |
| 258 |
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printf("\n%s ring %sr%d\n", mat, object(), ++nrings); |
| 259 |
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printf("0\n0\n8\n"); |
| 260 |
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putv(cent); |
| 261 |
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putv(norm); |
| 262 |
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printf("%18.12g %18.12g\n", r1, r2); |
| 263 |
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return(MG_OK); |
| 264 |
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} |
| 265 |
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int |
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r_face(ac, av) /* convert a face */ |
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int ac; |
| 270 |
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char **av; |
| 271 |
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{ |
| 272 |
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static int nfaces; |
| 273 |
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char *mat; |
| 274 |
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register int i; |
| 275 |
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register C_VERTEX *cv; |
| 276 |
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FVECT v; |
| 277 |
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int rv; |
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| 279 |
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if (ac < 4) |
| 280 |
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return(MG_EARGC); |
| 281 |
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if ((mat = material()) == NULL) |
| 282 |
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return(MG_EBADMAT); |
| 283 |
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if (ac < 5) { /* check for surface normals */ |
| 284 |
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for (i = 1; i < ac; i++) { |
| 285 |
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if ((cv = c_getvert(av[i])) == NULL) |
| 286 |
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return(MG_EUNDEF); |
| 287 |
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if (is0vect(cv->n)) |
| 288 |
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break; |
| 289 |
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} |
| 290 |
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if (i == ac) { /* break into triangles */ |
| 291 |
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do_tri(mat, av[1], av[2], av[3]); |
| 292 |
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if (ac == 5) |
| 293 |
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do_tri(mat, av[3], av[4], av[1]); |
| 294 |
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return(MG_OK); |
| 295 |
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} |
| 296 |
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} |
| 297 |
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printf("\n%s polygon %sf%d\n", mat, object(), ++nfaces); |
| 298 |
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printf("0\n0\n%d\n", 3*(ac-1)); |
| 299 |
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for (i = 1; i < ac; i++) { |
| 300 |
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if ((cv = c_getvert(av[i])) == NULL) |
| 301 |
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return(MG_EUNDEF); |
| 302 |
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xf_xfmpoint(v, cv->p); |
| 303 |
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putv(v); |
| 304 |
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} |
| 305 |
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return(MG_OK); |
| 306 |
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} |
| 307 |
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| 308 |
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| 309 |
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r_ies(ac, av) /* convert an IES luminaire file */ |
| 310 |
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int ac; |
| 311 |
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char **av; |
| 312 |
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{ |
| 313 |
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int xa0 = 2; |
| 314 |
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char combuf[72]; |
| 315 |
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char fname[48]; |
| 316 |
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char *oname; |
| 317 |
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register char *op; |
| 318 |
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register int i; |
| 319 |
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| 320 |
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if (ac < 2) |
| 321 |
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return(MG_EARGC); |
| 322 |
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(void)strcpy(combuf, "ies2rad"); |
| 323 |
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op = combuf + 7; |
| 324 |
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if (ac-xa0 >= 2 && !strcmp(av[xa0], "-m")) { |
| 325 |
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if (!isflt(av[xa0+1])) |
| 326 |
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return(MG_ETYPE); |
| 327 |
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op = addarg(addarg(op, "-m"), av[xa0+1]); |
| 328 |
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xa0 += 2; |
| 329 |
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} |
| 330 |
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if (access(av[1], 0) == -1) |
| 331 |
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return(MG_ENOFILE); |
| 332 |
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*op++ = ' '; /* IES filename goes last */ |
| 333 |
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(void)strcpy(op, av[1]); |
| 334 |
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system(combuf); /* run ies2rad */ |
| 335 |
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/* now let's find the output file */ |
| 336 |
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if ((op = strrchr(av[1], '/')) == NULL) |
| 337 |
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op = av[1]; |
| 338 |
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(void)strcpy(fname, op); |
| 339 |
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if ((op = strrchr(fname, '.')) == NULL) |
| 340 |
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op = fname + strlen(fname); |
| 341 |
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(void)strcpy(op, ".rad"); |
| 342 |
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if (access(fname, 0) == -1) |
| 343 |
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return(MG_EINCL); |
| 344 |
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/* put out xform command */ |
| 345 |
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printf("\n!xform"); |
| 346 |
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oname = object(); |
| 347 |
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if (*oname) |
| 348 |
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printf(" -n %s", oname); |
| 349 |
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for (i = xa0; i < ac; i++) |
| 350 |
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printf(" %s", av[i]); |
| 351 |
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if (ac > xa0 && xf_argc > 0) |
| 352 |
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printf(" -i 1"); |
| 353 |
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for (i = 0; i < xf_argc; i++) |
| 354 |
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printf(" %s", xf_argv[i]); |
| 355 |
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printf(" %s\n", fname); |
| 356 |
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return(MG_OK); |
| 357 |
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} |
| 358 |
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| 359 |
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| 360 |
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do_tri(mat, vn1, vn2, vn3) /* put out smoothed triangle */ |
| 361 |
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char *mat, *vn1, *vn2, *vn3; |
| 362 |
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{ |
| 363 |
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static int ntris; |
| 364 |
|
|
char *mod = mat; |
| 365 |
|
|
BARYCCM bvecs; |
| 366 |
|
|
FLOAT bcoor[3][3]; |
| 367 |
|
|
C_VERTEX *cv1, *cv2, *cv3; |
| 368 |
|
|
FVECT v1, v2, v3; |
| 369 |
|
|
FVECT n1, n2, n3; |
| 370 |
|
|
register int i; |
| 371 |
|
|
/* the following is repeat code, so assume it's OK */ |
| 372 |
|
|
cv1 = c_getvert(vn1); |
| 373 |
|
|
cv2 = c_getvert(vn2); |
| 374 |
|
|
cv3 = c_getvert(vn3); |
| 375 |
|
|
xf_xfmpoint(v1, cv1->p); |
| 376 |
|
|
xf_xfmpoint(v2, cv2->p); |
| 377 |
|
|
xf_xfmpoint(v3, cv3->p); |
| 378 |
|
|
if (comp_baryc(&bvecs, v1, v2, v3) == 0) { |
| 379 |
|
|
printf("\n%s texfunc T-nor\n", mod); |
| 380 |
|
|
mod = "T-nor"; |
| 381 |
|
|
printf("4 dx dy dz %s\n0\n", TCALNAME); |
| 382 |
|
|
xf_rotvect(n1, cv1->n); |
| 383 |
|
|
xf_rotvect(n2, cv2->n); |
| 384 |
|
|
xf_rotvect(n3, cv3->n); |
| 385 |
|
|
for (i = 0; i < 3; i++) { |
| 386 |
|
|
bcoor[i][0] = n1[i]; |
| 387 |
|
|
bcoor[i][1] = n2[i]; |
| 388 |
|
|
bcoor[i][2] = n3[i]; |
| 389 |
|
|
} |
| 390 |
|
|
put_baryc(&bvecs, bcoor, 3); |
| 391 |
|
|
} |
| 392 |
|
|
printf("\n%s polygon %st%d\n", mod, object(), ++ntris); |
| 393 |
|
|
printf("0\n0\n9\n"); |
| 394 |
|
|
putv(v1); |
| 395 |
|
|
putv(v2); |
| 396 |
|
|
putv(v3); |
| 397 |
|
|
} |
| 398 |
|
|
|
| 399 |
|
|
|
| 400 |
|
|
char * |
| 401 |
|
|
material() /* get (and print) current material */ |
| 402 |
|
|
{ |
| 403 |
|
|
char *mname = "mat"; |
| 404 |
|
|
COLOR radrgb, c2; |
| 405 |
|
|
double d; |
| 406 |
|
|
register int i; |
| 407 |
|
|
|
| 408 |
|
|
if (c_cmaterial->name != NULL) |
| 409 |
|
|
mname = c_cmaterial->name; |
| 410 |
|
|
if (!c_cmaterial->clock) |
| 411 |
|
|
return(mname); /* already current */ |
| 412 |
|
|
/* else update output */ |
| 413 |
|
|
c_cmaterial->clock = 0; |
| 414 |
|
|
if (c_cmaterial->ed > .1) { /* emitter */ |
| 415 |
|
|
cvtcolor(radrgb, &c_cmaterial->ed_c, |
| 416 |
|
|
emult*c_cmaterial->ed/WHTEFFICACY); |
| 417 |
|
|
if (glowdist < BIGFLT) { /* do a glow */ |
| 418 |
|
|
printf("\nvoid glow %s\n0\n0\n", mname); |
| 419 |
|
|
printf("4 %f %f %f %f\n", colval(radrgb,RED), |
| 420 |
|
|
colval(radrgb,GRN), |
| 421 |
|
|
colval(radrgb,BLU), glowdist); |
| 422 |
|
|
} else { |
| 423 |
|
|
printf("\nvoid light %s\n0\n0\n", mname); |
| 424 |
|
|
printf("3 %f %f %f\n", colval(radrgb,RED), |
| 425 |
|
|
colval(radrgb,GRN), |
| 426 |
|
|
colval(radrgb,BLU)); |
| 427 |
|
|
} |
| 428 |
|
|
return(mname); |
| 429 |
|
|
} |
| 430 |
|
|
d = c_cmaterial->rd + c_cmaterial->td + |
| 431 |
|
|
c_cmaterial->rs + c_cmaterial->ts; |
| 432 |
|
|
if (d <= 0. | d >= 1.) |
| 433 |
|
|
return(NULL); |
| 434 |
|
|
if (c_cmaterial->td > .01 || c_cmaterial->ts > .01) { /* trans */ |
| 435 |
|
|
double ts, a5, a6; |
| 436 |
|
|
|
| 437 |
|
|
ts = sqrt(c_cmaterial->ts); /* because we use 2 sides */ |
| 438 |
|
|
/* average colors */ |
| 439 |
|
|
d = c_cmaterial->rd + c_cmaterial->td + ts; |
| 440 |
|
|
cvtcolor(radrgb, &c_cmaterial->rd_c, c_cmaterial->rd/d); |
| 441 |
|
|
cvtcolor(c2, &c_cmaterial->td_c, c_cmaterial->td/d); |
| 442 |
|
|
addcolor(radrgb, c2); |
| 443 |
|
|
cvtcolor(c2, &c_cmaterial->ts_c, ts/d); |
| 444 |
|
|
addcolor(radrgb, c2); |
| 445 |
|
|
if (c_cmaterial->rs + ts > .0001) |
| 446 |
|
|
a5 = (c_cmaterial->rs*c_cmaterial->rs_a + |
| 447 |
|
|
ts*.5*c_cmaterial->ts_a) / |
| 448 |
|
|
(c_cmaterial->rs + ts); |
| 449 |
|
|
a6 = (c_cmaterial->td + ts) / |
| 450 |
|
|
(c_cmaterial->rd + c_cmaterial->td + ts); |
| 451 |
|
|
if (a6 < .999) { |
| 452 |
|
|
d = c_cmaterial->rd/(1. - c_cmaterial->rs)/(1. - a6); |
| 453 |
|
|
scalecolor(radrgb, d); |
| 454 |
|
|
} |
| 455 |
|
|
printf("\nvoid trans %s\n0\n0\n", mname); |
| 456 |
|
|
printf("7 %f %f %f\n", colval(radrgb,RED), |
| 457 |
|
|
colval(radrgb,GRN), colval(radrgb,BLU)); |
| 458 |
|
|
printf("\t%f %f %f %f\n", c_cmaterial->rs, a5, a6, |
| 459 |
|
|
ts/(ts + c_cmaterial->td)); |
| 460 |
|
|
return(mname); |
| 461 |
|
|
} |
| 462 |
|
|
if (c_cmaterial->rs < .01 || isgrey(&c_cmaterial->rs_c)) { /* plastic */ |
| 463 |
|
|
if (c_cmaterial->rs > .999) |
| 464 |
|
|
cvtcolor(radrgb, &c_cmaterial->rd_c, 1.); |
| 465 |
|
|
else |
| 466 |
|
|
cvtcolor(radrgb, &c_cmaterial->rd_c, |
| 467 |
|
|
c_cmaterial->rd/(1.-c_cmaterial->rs)); |
| 468 |
|
|
printf("\nvoid plastic %s\n0\n0\n", mname); |
| 469 |
|
|
printf("5 %f %f %f %f %f\n", colval(radrgb,RED), |
| 470 |
|
|
colval(radrgb,GRN), colval(radrgb,BLU), |
| 471 |
|
|
c_cmaterial->rs, c_cmaterial->rs_a); |
| 472 |
|
|
return(mname); |
| 473 |
|
|
} |
| 474 |
|
|
/* else it's metal */ |
| 475 |
|
|
d = c_cmaterial->rd + c_cmaterial->rs; /* average colors */ |
| 476 |
|
|
cvtcolor(radrgb, &c_cmaterial->rd_c, c_cmaterial->rd/d); |
| 477 |
|
|
cvtcolor(c2, &c_cmaterial->rs_c, c_cmaterial->rs/d); |
| 478 |
|
|
addcolor(radrgb, c2); |
| 479 |
|
|
if (c_cmaterial->rs < .999) { |
| 480 |
|
|
d = c_cmaterial->rd/(1. - c_cmaterial->rs); |
| 481 |
|
|
scalecolor(radrgb, d); |
| 482 |
|
|
} |
| 483 |
|
|
printf("\nvoid metal %s\n0\n0\n", mname); |
| 484 |
|
|
printf("5 %f %f %f %f %f\n", colval(radrgb,RED), |
| 485 |
|
|
colval(radrgb,GRN), colval(radrgb,BLU), |
| 486 |
|
|
c_cmaterial->rs, c_cmaterial->rs_a); |
| 487 |
|
|
return(mname); |
| 488 |
|
|
} |
| 489 |
|
|
|
| 490 |
|
|
|
| 491 |
|
|
cvtcolor(radrgb, ciec, intensity) /* convert a CIE color to Radiance */ |
| 492 |
|
|
COLOR radrgb; |
| 493 |
|
|
register C_COLOR *ciec; |
| 494 |
|
|
double intensity; |
| 495 |
|
|
{ |
| 496 |
|
|
static COLOR ciexyz; |
| 497 |
|
|
|
| 498 |
|
|
ciexyz[1] = intensity; |
| 499 |
|
|
ciexyz[0] = ciec->cx/ciec->cy*ciexyz[1]; |
| 500 |
|
|
ciexyz[2] = ciexyz[1]*(1./ciec->cy - 1.) - ciexyz[0]; |
| 501 |
|
|
cie_rgb(radrgb, ciexyz); |
| 502 |
|
|
} |
| 503 |
|
|
|
| 504 |
|
|
|
| 505 |
|
|
char * |
| 506 |
|
|
object() /* return current object name */ |
| 507 |
|
|
{ |
| 508 |
|
|
static char objbuf[64]; |
| 509 |
|
|
register int i; |
| 510 |
|
|
register char *cp; |
| 511 |
|
|
int len; |
| 512 |
|
|
|
| 513 |
|
|
i = obj_nnames - sizeof(objbuf)/16; |
| 514 |
|
|
if (i < 0) |
| 515 |
|
|
i = 0; |
| 516 |
|
|
for (cp = objbuf; i < obj_nnames && |
| 517 |
|
|
cp + (len=strlen(obj_name[i])) < objbuf+sizeof(objbuf)-1; |
| 518 |
|
|
i++, *cp++ = '.') { |
| 519 |
|
|
strcpy(cp, obj_name[i]); |
| 520 |
|
|
cp += len; |
| 521 |
|
|
} |
| 522 |
|
|
*cp = '\0'; |
| 523 |
|
|
return(objbuf); |
| 524 |
|
|
} |
| 525 |
|
|
|
| 526 |
|
|
|
| 527 |
|
|
char * |
| 528 |
|
|
addarg(op, arg) /* add argument and advance pointer */ |
| 529 |
|
|
register char *op, *arg; |
| 530 |
|
|
{ |
| 531 |
|
|
*op = ' '; |
| 532 |
|
|
while (*++op = *arg++) |
| 533 |
|
|
; |
| 534 |
|
|
return(op); |
| 535 |
|
|
} |
