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/* Copyright (c) 1994 Regents of the University of California */ |
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|
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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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/* |
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* Context handlers |
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*/ |
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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 "parser.h" |
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#include "lookup.h" |
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|
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/* default context values */ |
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static C_COLOR c_dfcolor = C_DEFCOLOR; |
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static C_MATERIAL c_dfmaterial = C_DEFMATERIAL; |
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static C_VERTEX c_dfvertex = C_DEFVERTEX; |
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|
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/* the unnamed contexts */ |
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static C_COLOR c_uncolor = C_DEFCOLOR; |
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static C_MATERIAL c_unmaterial = C_DEFMATERIAL; |
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static C_VERTEX c_unvertex = C_DEFVERTEX; |
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|
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/* the current contexts */ |
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C_COLOR *c_ccolor = &c_uncolor; |
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char *c_ccname = NULL; |
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C_MATERIAL *c_cmaterial = &c_unmaterial; |
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char *c_cmname = NULL; |
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C_VERTEX *c_cvertex = &c_unvertex; |
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char *c_cvname = NULL; |
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|
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static LUTAB clr_tab = LU_SINIT(free,free); /* color lookup table */ |
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static LUTAB mat_tab = LU_SINIT(free,free); /* material lookup table */ |
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static LUTAB vtx_tab = LU_SINIT(free,free); /* vertex lookup table */ |
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|
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/* CIE 1931 Standard Observer */ |
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static C_COLOR cie_xf = C_CIEX; |
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static C_COLOR cie_yf = C_CIEY; |
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static C_COLOR cie_zf = C_CIEZ; |
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|
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static int setspectrum(); |
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static int setbbtemp(); |
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static void mixcolors(); |
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|
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|
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int |
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c_hcolor(ac, av) /* handle color entity */ |
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int ac; |
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register char **av; |
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{ |
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double w, wsum; |
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register int i; |
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register LUENT *lp; |
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|
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switch (mg_entity(av[0])) { |
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case MG_E_COLOR: /* get/set color context */ |
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if (ac > 4) |
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return(MG_EARGC); |
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if (ac == 1) { /* set unnamed color context */ |
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c_uncolor = c_dfcolor; |
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c_ccolor = &c_uncolor; |
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c_ccname = NULL; |
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return(MG_OK); |
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} |
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lp = lu_find(&clr_tab, av[1]); /* lookup context */ |
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if (lp == NULL) |
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return(MG_EMEM); |
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c_ccname = lp->key; |
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c_ccolor = (C_COLOR *)lp->data; |
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if (ac == 2) { /* reestablish previous context */ |
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if (c_ccolor == NULL) |
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return(MG_EUNDEF); |
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return(MG_OK); |
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} |
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if (av[2][0] != '=' || av[2][1]) |
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return(MG_ETYPE); |
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if (c_ccolor == NULL) { /* create new color context */ |
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lp->key = (char *)malloc(strlen(av[1])+1); |
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if (lp->key == NULL) |
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return(MG_EMEM); |
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strcpy(lp->key, av[1]); |
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lp->data = (char *)malloc(sizeof(C_COLOR)); |
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if (lp->data == NULL) |
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return(MG_EMEM); |
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c_ccname = lp->key; |
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c_ccolor = (C_COLOR *)lp->data; |
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c_ccolor->clock = 0; |
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} |
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i = c_ccolor->clock; |
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if (ac == 3) { /* use default template */ |
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*c_ccolor = c_dfcolor; |
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c_ccolor->clock = i + 1; |
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return(MG_OK); |
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} |
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lp = lu_find(&clr_tab, av[3]); /* lookup template */ |
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if (lp == NULL) |
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return(MG_EMEM); |
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if (lp->data == NULL) |
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return(MG_EUNDEF); |
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*c_ccolor = *(C_COLOR *)lp->data; |
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c_ccolor->clock = i + 1; |
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return(MG_OK); |
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case MG_E_CXY: /* assign CIE XY value */ |
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if (ac != 3) |
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return(MG_EARGC); |
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if (!isflt(av[1]) | !isflt(av[2])) |
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return(MG_ETYPE); |
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c_ccolor->cx = atof(av[1]); |
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c_ccolor->cy = atof(av[2]); |
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c_ccolor->flags = C_CDXY|C_CSXY; |
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if (c_ccolor->cx < 0. | c_ccolor->cy < 0. | |
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c_ccolor->cx + c_ccolor->cy > 1.) |
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return(MG_EILL); |
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c_ccolor->clock++; |
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return(MG_OK); |
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case MG_E_CSPEC: /* assign spectral values */ |
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if (ac < 5) |
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return(MG_EARGC); |
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if (!isflt(av[1]) | !isflt(av[2])) |
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return(MG_ETYPE); |
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return(setspectrum(c_ccolor, atof(av[1]), atof(av[2]), |
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ac-3, av+3)); |
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case MG_E_CCT: /* assign black body spectrum */ |
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if (ac != 2) |
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return(MG_EARGC); |
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if (!isflt(av[1])) |
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return(MG_ETYPE); |
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return(setbbtemp(c_ccolor, atof(av[1]))); |
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case MG_E_CMIX: /* mix colors */ |
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if (ac < 5 || (ac-1)%2) |
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return(MG_EARGC); |
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if (!isflt(av[1])) |
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return(MG_ETYPE); |
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wsum = atof(av[1]); |
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if (wsum < 0.) |
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return(MG_EILL); |
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if ((lp = lu_find(&clr_tab, av[2])) == NULL) |
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return(MG_EMEM); |
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if (lp->data == NULL) |
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return(MG_EUNDEF); |
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*c_ccolor = *(C_COLOR *)lp->data; |
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for (i = 3; i < ac; i += 2) { |
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if (!isflt(av[i])) |
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return(MG_ETYPE); |
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w = atof(av[i]); |
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if (w < 0.) |
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return(MG_EILL); |
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if ((lp = lu_find(&clr_tab, av[i+1])) == NULL) |
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return(MG_EMEM); |
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if (lp->data == NULL) |
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return(MG_EUNDEF); |
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mixcolors(c_ccolor, wsum, c_ccolor, |
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w, (C_COLOR *)lp->data); |
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wsum += w; |
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} |
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c_ccolor->clock++; |
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return(MG_OK); |
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} |
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return(MG_EUNK); |
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} |
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|
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|
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int |
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c_hmaterial(ac, av) /* handle material entity */ |
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int ac; |
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register char **av; |
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{ |
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int i; |
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register LUENT *lp; |
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|
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switch (mg_entity(av[0])) { |
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case MG_E_MATERIAL: /* get/set material context */ |
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if (ac > 4) |
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return(MG_EARGC); |
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if (ac == 1) { /* set unnamed material context */ |
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c_unmaterial = c_dfmaterial; |
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c_cmaterial = &c_unmaterial; |
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c_cmname = NULL; |
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return(MG_OK); |
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} |
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lp = lu_find(&mat_tab, av[1]); /* lookup context */ |
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if (lp == NULL) |
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return(MG_EMEM); |
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c_cmname = lp->key; |
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c_cmaterial = (C_MATERIAL *)lp->data; |
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if (ac == 2) { /* reestablish previous context */ |
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if (c_cmaterial == NULL) |
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return(MG_EUNDEF); |
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return(MG_OK); |
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} |
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if (av[2][0] != '=' || av[2][1]) |
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return(MG_ETYPE); |
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if (c_cmaterial == NULL) { /* create new material */ |
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lp->key = (char *)malloc(strlen(av[1])+1); |
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if (lp->key == NULL) |
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return(MG_EMEM); |
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strcpy(lp->key, av[1]); |
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lp->data = (char *)malloc(sizeof(C_MATERIAL)); |
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if (lp->data == NULL) |
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return(MG_EMEM); |
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c_cmname = lp->key; |
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c_cmaterial = (C_MATERIAL *)lp->data; |
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c_cmaterial->clock = 0; |
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} |
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i = c_cmaterial->clock; |
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if (ac == 3) { /* use default template */ |
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*c_cmaterial = c_dfmaterial; |
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c_cmaterial->clock = i + 1; |
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return(MG_OK); |
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} |
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lp = lu_find(&mat_tab, av[3]); /* lookup template */ |
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if (lp == NULL) |
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return(MG_EMEM); |
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if (lp->data == NULL) |
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return(MG_EUNDEF); |
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*c_cmaterial = *(C_MATERIAL *)lp->data; |
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c_cmaterial->clock = i + 1; |
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return(MG_OK); |
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case MG_E_RD: /* set diffuse reflectance */ |
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if (ac != 2) |
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return(MG_EARGC); |
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if (!isflt(av[1])) |
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return(MG_ETYPE); |
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c_cmaterial->rd = atof(av[1]); |
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if (c_cmaterial->rd < 0. | c_cmaterial->rd > 1.) |
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return(MG_EILL); |
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c_cmaterial->rd_c = *c_ccolor; |
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c_cmaterial->clock++; |
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return(MG_OK); |
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case MG_E_ED: /* set diffuse emittance */ |
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if (ac != 2) |
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return(MG_EARGC); |
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if (!isflt(av[1])) |
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return(MG_ETYPE); |
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c_cmaterial->ed = atof(av[1]); |
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if (c_cmaterial->ed < 0.) |
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return(MG_EILL); |
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c_cmaterial->ed_c = *c_ccolor; |
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c_cmaterial->clock++; |
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return(MG_OK); |
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case MG_E_TD: /* set diffuse transmittance */ |
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if (ac != 2) |
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return(MG_EARGC); |
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if (!isflt(av[1])) |
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return(MG_ETYPE); |
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c_cmaterial->td = atof(av[1]); |
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if (c_cmaterial->td < 0. | c_cmaterial->td > 1.) |
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return(MG_EILL); |
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c_cmaterial->td_c = *c_ccolor; |
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c_cmaterial->clock++; |
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return(MG_OK); |
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case MG_E_RS: /* set specular reflectance */ |
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if (ac != 3) |
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return(MG_EARGC); |
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if (!isflt(av[1]) | !isflt(av[2])) |
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return(MG_ETYPE); |
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c_cmaterial->rs = atof(av[1]); |
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c_cmaterial->rs_a = atof(av[2]); |
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if (c_cmaterial->rs < 0. | c_cmaterial->rs > 1. | |
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c_cmaterial->rs_a < 0.) |
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return(MG_EILL); |
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c_cmaterial->rs_c = *c_ccolor; |
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c_cmaterial->clock++; |
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return(MG_OK); |
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case MG_E_TS: /* set specular transmittance */ |
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if (ac != 3) |
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return(MG_EARGC); |
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if (!isflt(av[1]) | !isflt(av[2])) |
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return(MG_ETYPE); |
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c_cmaterial->ts = atof(av[1]); |
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c_cmaterial->ts_a = atof(av[2]); |
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if (c_cmaterial->ts < 0. | c_cmaterial->ts > 1. | |
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c_cmaterial->ts_a < 0.) |
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return(MG_EILL); |
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c_cmaterial->ts_c = *c_ccolor; |
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c_cmaterial->clock++; |
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return(MG_OK); |
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case MG_E_SIDES: /* set number of sides */ |
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if (ac != 2) |
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return(MG_EARGC); |
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if (!isint(av[1])) |
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return(MG_ETYPE); |
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i = atoi(av[1]); |
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if (i == 1) |
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c_cmaterial->sided = 1; |
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else if (i == 2) |
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c_cmaterial->sided = 0; |
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else |
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return(MG_EILL); |
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c_cmaterial->clock++; |
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return(MG_OK); |
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} |
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return(MG_EUNK); |
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} |
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|
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|
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int |
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c_hvertex(ac, av) /* handle a vertex entity */ |
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int ac; |
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register char **av; |
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{ |
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int i; |
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register LUENT *lp; |
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|
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switch (mg_entity(av[0])) { |
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case MG_E_VERTEX: /* get/set vertex context */ |
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if (ac > 4) |
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return(MG_EARGC); |
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if (ac == 1) { /* set unnamed vertex context */ |
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c_unvertex = c_dfvertex; |
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c_cvertex = &c_unvertex; |
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c_cvname = NULL; |
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return(MG_OK); |
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} |
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lp = lu_find(&vtx_tab, av[1]); /* lookup context */ |
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if (lp == NULL) |
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return(MG_EMEM); |
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c_cvname = lp->key; |
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c_cvertex = (C_VERTEX *)lp->data; |
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if (ac == 2) { /* reestablish previous context */ |
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if (c_cvertex == NULL) |
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return(MG_EUNDEF); |
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return(MG_OK); |
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} |
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if (av[2][0] != '=' || av[2][1]) |
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return(MG_ETYPE); |
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if (c_cvertex == NULL) { /* create new vertex context */ |
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lp->key = (char *)malloc(strlen(av[1])+1); |
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if (lp->key == NULL) |
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return(MG_EMEM); |
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strcpy(lp->key, av[1]); |
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lp->data = (char *)malloc(sizeof(C_VERTEX)); |
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if (lp->data == NULL) |
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return(MG_EMEM); |
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c_cvname = lp->key; |
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c_cvertex = (C_VERTEX *)lp->data; |
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} |
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i = c_cvertex->clock; |
342 |
if (ac == 3) { /* use default template */ |
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*c_cvertex = c_dfvertex; |
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c_cvertex->clock = i + 1; |
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return(MG_OK); |
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} |
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lp = lu_find(&vtx_tab, av[3]); /* lookup template */ |
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if (lp == NULL) |
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return(MG_EMEM); |
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if (lp->data == NULL) |
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return(MG_EUNDEF); |
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*c_cvertex = *(C_VERTEX *)lp->data; |
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c_cvertex->clock = i + 1; |
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return(MG_OK); |
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case MG_E_POINT: /* set point */ |
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if (ac != 4) |
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return(MG_EARGC); |
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if (!isflt(av[1]) | !isflt(av[2]) | !isflt(av[3])) |
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return(MG_ETYPE); |
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c_cvertex->p[0] = atof(av[1]); |
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c_cvertex->p[1] = atof(av[2]); |
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c_cvertex->p[2] = atof(av[3]); |
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c_cvertex->clock++; |
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return(MG_OK); |
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case MG_E_NORMAL: /* set normal */ |
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if (ac != 4) |
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return(MG_EARGC); |
368 |
if (!isflt(av[1]) | !isflt(av[2]) | !isflt(av[3])) |
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return(MG_ETYPE); |
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c_cvertex->n[0] = atof(av[1]); |
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c_cvertex->n[1] = atof(av[2]); |
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c_cvertex->n[2] = atof(av[3]); |
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(void)normalize(c_cvertex->n); |
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c_cvertex->clock++; |
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return(MG_OK); |
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} |
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return(MG_EUNK); |
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} |
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|
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|
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void |
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c_clearall() /* empty context tables */ |
383 |
{ |
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c_uncolor = c_dfcolor; |
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c_ccolor = &c_uncolor; |
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c_ccname = NULL; |
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lu_done(&clr_tab); |
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c_unmaterial = c_dfmaterial; |
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c_cmaterial = &c_unmaterial; |
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c_cmname = NULL; |
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lu_done(&mat_tab); |
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c_unvertex = c_dfvertex; |
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c_cvertex = &c_unvertex; |
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c_cvname = NULL; |
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lu_done(&vtx_tab); |
396 |
} |
397 |
|
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|
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C_MATERIAL * |
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c_getmaterial(name) /* get a named material */ |
401 |
char *name; |
402 |
{ |
403 |
register LUENT *lp; |
404 |
|
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if ((lp = lu_find(&mat_tab, name)) == NULL) |
406 |
return(NULL); |
407 |
return((C_MATERIAL *)lp->data); |
408 |
} |
409 |
|
410 |
|
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C_VERTEX * |
412 |
c_getvert(name) /* get a named vertex */ |
413 |
char *name; |
414 |
{ |
415 |
register LUENT *lp; |
416 |
|
417 |
if ((lp = lu_find(&vtx_tab, name)) == NULL) |
418 |
return(NULL); |
419 |
return((C_VERTEX *)lp->data); |
420 |
} |
421 |
|
422 |
|
423 |
C_COLOR * |
424 |
c_getcolor(name) /* get a named color */ |
425 |
char *name; |
426 |
{ |
427 |
register LUENT *lp; |
428 |
|
429 |
if ((lp = lu_find(&clr_tab, name)) == NULL) |
430 |
return(NULL); |
431 |
return((C_COLOR *)lp->data); |
432 |
} |
433 |
|
434 |
|
435 |
int |
436 |
c_isgrey(clr) /* check if color is grey */ |
437 |
register C_COLOR *clr; |
438 |
{ |
439 |
if (!(clr->flags & (C_CSXY|C_CSSPEC))) |
440 |
return(1); /* no settings == grey */ |
441 |
c_ccvt(clr, C_CSXY); |
442 |
return(clr->cx >= .323 && clr->cx <= .343 && |
443 |
clr->cy >= .323 && clr->cy <= .343); |
444 |
} |
445 |
|
446 |
|
447 |
void |
448 |
c_ccvt(clr, fl) /* convert color representations */ |
449 |
register C_COLOR *clr; |
450 |
int fl; |
451 |
{ |
452 |
double x, y, z; |
453 |
register int i; |
454 |
|
455 |
fl &= ~clr->flags; /* ignore what's done */ |
456 |
if (!fl) /* everything's done! */ |
457 |
return; |
458 |
if (!(clr->flags & (C_CSXY|C_CSSPEC))) /* nothing set! */ |
459 |
*clr = c_dfcolor; |
460 |
if (fl & C_CSXY) { /* cspec -> cxy */ |
461 |
x = y = z = 0.; |
462 |
for (i = 0; i < C_CNSS; i++) { |
463 |
x += cie_xf.ssamp[i] * clr->ssamp[i]; |
464 |
y += cie_yf.ssamp[i] * clr->ssamp[i]; |
465 |
z += cie_zf.ssamp[i] * clr->ssamp[i]; |
466 |
} |
467 |
x /= (double)cie_xf.ssum; |
468 |
y /= (double)cie_yf.ssum; |
469 |
z /= (double)cie_zf.ssum; |
470 |
z += x + y; |
471 |
clr->cx = x / z; |
472 |
clr->cy = y / z; |
473 |
clr->flags |= C_CSXY; |
474 |
} else if (fl & C_CSSPEC) { /* cxy -> cspec */ |
475 |
z = (cie_xf.ssum + cie_yf.ssum + cie_zf.ssum) / 3.; |
476 |
x = clr->cx * z / cie_xf.ssum; |
477 |
y = clr->cy * z / cie_yf.ssum; |
478 |
z = (1. - clr->cx - clr->cy) * z / cie_zf.ssum; |
479 |
clr->ssum = 0; |
480 |
for (i = 0; i < C_CNSS; i++) |
481 |
clr->ssum += clr->ssamp[i] = |
482 |
x * cie_xf.ssamp[i] + |
483 |
y * cie_yf.ssamp[i] + |
484 |
z * cie_zf.ssamp[i] + .5; |
485 |
clr->flags |= C_CSSPEC; |
486 |
} |
487 |
if (fl & C_CSEFF) { /* compute efficacy */ |
488 |
if (clr->flags & C_CDSPEC) { /* from spectrum */ |
489 |
y = 0.; |
490 |
for (i = 0; i < C_CNSS; i++) |
491 |
y += cie_yf.ssamp[i] * clr->ssamp[i]; |
492 |
clr->eff = C_CLPWM * y / clr->ssum; |
493 |
} else /* clr->flags & C_CDXY */ { /* from (x,y) */ |
494 |
clr->eff = clr->cx*cie_xf.eff + clr->cy*cie_yf.eff + |
495 |
(1. - clr->cx - clr->cy)*cie_zf.eff; |
496 |
} |
497 |
clr->flags |= C_CSEFF; |
498 |
} |
499 |
} |
500 |
|
501 |
|
502 |
static int |
503 |
setspectrum(clr, wlmin, wlmax, ac, av) /* convert a spectrum */ |
504 |
register C_COLOR *clr; |
505 |
double wlmin, wlmax; |
506 |
int ac; |
507 |
char **av; |
508 |
{ |
509 |
double scale; |
510 |
float va[C_CNSS]; |
511 |
register int i, pos; |
512 |
int n, imax; |
513 |
int wl; |
514 |
double wl0, wlstep; |
515 |
/* check bounds */ |
516 |
if (wlmax <= C_CMINWL | wlmax <= wlmin | wlmin >= C_CMAXWL) |
517 |
return(MG_EILL); |
518 |
wlstep = (wlmax - wlmin)/(ac-1); |
519 |
while (wlmin < C_CMINWL) { |
520 |
wlmin += wlstep; |
521 |
ac--; av++; |
522 |
} |
523 |
while (wlmax > C_CMAXWL) { |
524 |
wlmax -= wlstep; |
525 |
ac--; |
526 |
} |
527 |
if (ac < 2) |
528 |
return(MG_EILL); |
529 |
imax = ac; /* box filter if necessary */ |
530 |
if (wlstep < C_CWLI) { |
531 |
wlstep = C_CWLI; |
532 |
imax = (wlmax - wlmin)/wlstep; |
533 |
} |
534 |
scale = 0.; /* get values and maximum */ |
535 |
pos = 0; |
536 |
for (i = 0; i < imax; i++) { |
537 |
va[i] = 0.; n = 0; |
538 |
while (pos < (i+.5)*ac/imax) { |
539 |
if (!isflt(av[pos])) |
540 |
return(MG_ETYPE); |
541 |
va[i] += atof(av[pos++]); |
542 |
n++; |
543 |
} |
544 |
if (n > 1) |
545 |
va[i] /= (double)n; |
546 |
if (va[i] < 0.) |
547 |
return(MG_EILL); |
548 |
if (va[i] > scale) |
549 |
scale = va[i]; |
550 |
} |
551 |
if (scale == 0.) |
552 |
return(MG_EILL); |
553 |
scale = C_CMAXV / scale; |
554 |
clr->ssum = 0; /* convert to our spacing */ |
555 |
wl0 = wlmin; |
556 |
pos = 0; |
557 |
for (i = 0, wl = C_CMINWL; i < C_CNSS; i++, wl += C_CWLI) |
558 |
if (wl < wlmin | wl > wlmax) |
559 |
clr->ssamp[i] = 0; |
560 |
else { |
561 |
while (wl0 + wlstep < wl+FTINY) { |
562 |
wl0 += wlstep; |
563 |
pos++; |
564 |
} |
565 |
if (wl+FTINY >= wl0 & wl-FTINY <= wl0) |
566 |
clr->ssamp[i] = scale*va[pos] + .5; |
567 |
else /* interpolate if necessary */ |
568 |
clr->ssamp[i] = .5 + scale / wlstep * |
569 |
( va[pos]*(wl0+wlstep - wl) + |
570 |
va[pos+1]*(wl - wl0) ); |
571 |
clr->ssum += clr->ssamp[i]; |
572 |
} |
573 |
clr->flags = C_CDSPEC|C_CSSPEC; |
574 |
clr->clock++; |
575 |
return(MG_OK); |
576 |
} |
577 |
|
578 |
|
579 |
static void |
580 |
mixcolors(cres, w1, c1, w2, c2) /* mix two colors according to weights given */ |
581 |
register C_COLOR *cres, *c1, *c2; |
582 |
double w1, w2; |
583 |
{ |
584 |
double scale; |
585 |
float cmix[C_CNSS]; |
586 |
register int i; |
587 |
|
588 |
if ((c1->flags|c2->flags) & C_CDSPEC) { /* spectral mixing */ |
589 |
c_ccvt(c1, C_CSSPEC|C_CSEFF); |
590 |
c_ccvt(c2, C_CSSPEC|C_CSEFF); |
591 |
w1 /= c1->eff*c1->ssum; |
592 |
w2 /= c2->eff*c2->ssum; |
593 |
scale = 0.; |
594 |
for (i = 0; i < C_CNSS; i++) { |
595 |
cmix[i] = w1*c1->ssamp[i] + w2*c2->ssamp[i]; |
596 |
if (cmix[i] > scale) |
597 |
scale = cmix[i]; |
598 |
} |
599 |
scale = C_CMAXV / scale; |
600 |
cres->ssum = 0; |
601 |
for (i = 0; i < C_CNSS; i++) |
602 |
cres->ssum += cres->ssamp[i] = scale*cmix[i] + .5; |
603 |
cres->flags = C_CDSPEC|C_CSSPEC; |
604 |
} else { /* CIE xy mixing */ |
605 |
c_ccvt(c1, C_CSXY); |
606 |
c_ccvt(c2, C_CSXY); |
607 |
scale = 1. / (w1/c1->cy + w2/c2->cy); |
608 |
cres->cx = (c1->cx*w1/c1->cy + c2->cx*w2/c2->cy) * scale; |
609 |
cres->cy = (w1 + w2) * scale; |
610 |
cres->flags = C_CDXY|C_CSXY; |
611 |
} |
612 |
} |
613 |
|
614 |
|
615 |
#define C1 3.741832e-16 /* W-m^2 */ |
616 |
#define C2 1.4388e-2 /* m-K */ |
617 |
|
618 |
#define bbsp(l,t) (C1/((l)*(l)*(l)*(l)*(l)*(exp(C2/((t)*(l)))-1.))) |
619 |
#define bblm(t) (C2/5./(t)) |
620 |
|
621 |
static int |
622 |
setbbtemp(clr, tk) /* set black body spectrum */ |
623 |
register C_COLOR *clr; |
624 |
double tk; |
625 |
{ |
626 |
double sf, wl; |
627 |
register int i; |
628 |
|
629 |
if (tk < 1000) |
630 |
return(MG_EILL); |
631 |
wl = bblm(tk); /* scalefactor based on peak */ |
632 |
if (wl < C_CMINWL*1e-9) |
633 |
wl = C_CMINWL*1e-9; |
634 |
else if (wl > C_CMAXWL*1e-9) |
635 |
wl = C_CMAXWL*1e-9; |
636 |
sf = C_CMAXV/bbsp(wl,tk); |
637 |
clr->ssum = 0; |
638 |
for (i = 0; i < C_CNSS; i++) { |
639 |
wl = (C_CMINWL + i*C_CWLI)*1e-9; |
640 |
clr->ssum += clr->ssamp[i] = sf*bbsp(wl,tk) + .5; |
641 |
} |
642 |
clr->flags = C_CDSPEC|C_CSSPEC; |
643 |
clr->clock++; |
644 |
return(MG_OK); |
645 |
} |
646 |
|
647 |
#undef C1 |
648 |
#undef C2 |
649 |
#undef bbsp |
650 |
#undef bblm |