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/* 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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static const char RCSid[] = "$Id$"; |
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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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#include <stdio.h> |
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#include <math.h> |
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#include <stdlib.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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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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/* CIE 1931 Standard Observer curves */ |
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static C_COLOR cie_xf = { 1, NULL, C_CDSPEC|C_CSSPEC|C_CSXY|C_CSEFF, |
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{14,42,143,435,1344,2839,3483,3362,2908,1954,956, |
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320,49,93,633,1655,2904,4334,5945,7621,9163,10263, |
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10622,10026,8544,6424,4479,2835,1649,874,468,227, |
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114,58,29,14,7,3,2,1,0}, 106836L, .467, .368, 362.230 |
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}; |
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static C_COLOR cie_yf = { 1, NULL, C_CDSPEC|C_CSSPEC|C_CSXY|C_CSEFF, |
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{0,1,4,12,40,116,230,380,600,910,1390,2080,3230, |
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5030,7100,8620,9540,9950,9950,9520,8700,7570,6310, |
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5030,3810,2650,1750,1070,610,320,170,82,41,21,10, |
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5,2,1,1,0,0}, 106856L, .398, .542, 493.525 |
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}; |
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static C_COLOR cie_zf = { 1, NULL, C_CDSPEC|C_CSSPEC|C_CSXY|C_CSEFF, |
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{65,201,679,2074,6456,13856,17471,17721,16692, |
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12876,8130,4652,2720,1582,782,422,203,87,39,21,17, |
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11,8,3,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, |
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106770L, .147, .077, 54.363 |
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}; |
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/* Derived CIE 1931 Primaries (imaginary) */ |
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static C_COLOR cie_xp = { 1, NULL, C_CDSPEC|C_CSSPEC|C_CSXY, |
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{-174,-198,-195,-197,-202,-213,-235,-272,-333, |
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-444,-688,-1232,-2393,-4497,-6876,-6758,-5256, |
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-3100,-815,1320,3200,4782,5998,6861,7408,7754, |
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7980,8120,8199,8240,8271,8292,8309,8283,8469, |
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8336,8336,8336,8336,8336,8336}, |
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127424L, 1., .0, |
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}; |
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static C_COLOR cie_yp = { 1, NULL, C_CDSPEC|C_CSSPEC|C_CSXY, |
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{-451,-431,-431,-430,-427,-417,-399,-366,-312, |
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-204,57,691,2142,4990,8810,9871,9122,7321,5145, |
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3023,1123,-473,-1704,-2572,-3127,-3474,-3704, |
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-3846,-3927,-3968,-3999,-4021,-4038,-4012,-4201, |
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-4066,-4066,-4066,-4066,-4066,-4066}, |
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-23035L, .0, 1., |
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}; |
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static C_COLOR cie_zp = { 1, NULL, C_CDSPEC|C_CSSPEC|C_CSXY, |
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{4051,4054,4052,4053,4054,4056,4059,4064,4071, |
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4074,4056,3967,3677,2933,1492,313,-440,-795, |
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-904,-918,-898,-884,-869,-863,-855,-855,-851, |
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-848,-847,-846,-846,-846,-845,-846,-843,-845, |
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-845,-845,-845,-845,-845}, |
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36057L, .0, .0, |
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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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c_ccname = NULL; |
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return(MG_OK); |
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} |
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if (!isname(av[1])) |
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return(MG_EILL); |
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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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c_ccolor->clock = 0; |
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c_ccolor->client_data = NULL; |
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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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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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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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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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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 */ |
168 |
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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) |
185 |
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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) |
189 |
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return(MG_EMEM); |
190 |
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if (lp->data == NULL) |
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w, (C_COLOR *)lp->data); |
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wsum += w; |
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} |
196 |
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if (wsum <= 0.) |
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return(MG_EILL); |
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c_ccolor->clock++; |
199 |
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return(MG_OK); |
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} |
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c_cmname = NULL; |
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return(MG_OK); |
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} |
223 |
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if (!isname(av[1])) |
224 |
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return(MG_EILL); |
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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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c_cmaterial->clock = 0; |
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c_cmaterial->client_data = NULL; |
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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_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_IR: /* set index of refraction */ |
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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->nr = atof(av[1]); |
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c_cmaterial->ni = atof(av[2]); |
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if (c_cmaterial->nr <= FTINY) |
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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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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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> |
if ((c_cmaterial->rd < 0.) | (c_cmaterial->rd > 1.)) |
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return(MG_EILL); |
283 |
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c_cmaterial->rd_c = *c_ccolor; |
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c_cmaterial->clock++; |
300 |
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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.) |
303 |
> |
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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case MG_E_RS: /* set specular reflectance */ |
309 |
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if (ac != 3) |
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return(MG_EARGC); |
311 |
< |
if (!isflt(av[1]) || !isflt(av[2])) |
311 |
> |
if (!isflt(av[1]) | !isflt(av[2])) |
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return(MG_ETYPE); |
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c_cmaterial->rs = atof(av[1]); |
314 |
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c_cmaterial->rs_a = atof(av[2]); |
315 |
< |
if (c_cmaterial->rs < 0. | c_cmaterial->rs > 1. | |
316 |
< |
c_cmaterial->rs_a < 0.) |
315 |
> |
if ((c_cmaterial->rs < 0.) | (c_cmaterial->rs > 1.) | |
316 |
> |
(c_cmaterial->rs_a < 0.)) |
317 |
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return(MG_EILL); |
318 |
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c_cmaterial->rs_c = *c_ccolor; |
319 |
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c_cmaterial->clock++; |
321 |
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case MG_E_TS: /* set specular transmittance */ |
322 |
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if (ac != 3) |
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return(MG_EARGC); |
324 |
< |
if (!isflt(av[1]) || !isflt(av[2])) |
324 |
> |
if (!isflt(av[1]) | !isflt(av[2])) |
325 |
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return(MG_ETYPE); |
326 |
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c_cmaterial->ts = atof(av[1]); |
327 |
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c_cmaterial->ts_a = atof(av[2]); |
328 |
< |
if (c_cmaterial->ts < 0. | c_cmaterial->ts > 1. | |
329 |
< |
c_cmaterial->ts_a < 0.) |
328 |
> |
if ((c_cmaterial->ts < 0.) | (c_cmaterial->ts > 1.) | |
329 |
> |
(c_cmaterial->ts_a < 0.)) |
330 |
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return(MG_EILL); |
331 |
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c_cmaterial->ts_c = *c_ccolor; |
332 |
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c_cmaterial->clock++; |
368 |
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c_cvname = NULL; |
369 |
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return(MG_OK); |
370 |
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} |
371 |
+ |
if (!isname(av[1])) |
372 |
+ |
return(MG_EILL); |
373 |
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lp = lu_find(&vtx_tab, av[1]); /* lookup context */ |
374 |
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if (lp == NULL) |
375 |
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return(MG_EMEM); |
392 |
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return(MG_EMEM); |
393 |
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c_cvname = lp->key; |
394 |
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c_cvertex = (C_VERTEX *)lp->data; |
395 |
+ |
c_cvertex->clock = 0; |
396 |
+ |
c_cvertex->client_data = NULL; |
397 |
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} |
398 |
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i = c_cvertex->clock; |
399 |
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if (ac == 3) { /* use default template */ |
412 |
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case MG_E_POINT: /* set point */ |
413 |
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if (ac != 4) |
414 |
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return(MG_EARGC); |
415 |
< |
if (!isflt(av[1]) || !isflt(av[2]) || !isflt(av[3])) |
415 |
> |
if (!isflt(av[1]) | !isflt(av[2]) | !isflt(av[3])) |
416 |
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return(MG_ETYPE); |
417 |
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c_cvertex->p[0] = atof(av[1]); |
418 |
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c_cvertex->p[1] = atof(av[2]); |
422 |
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case MG_E_NORMAL: /* set normal */ |
423 |
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if (ac != 4) |
424 |
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return(MG_EARGC); |
425 |
< |
if (!isflt(av[1]) || !isflt(av[2]) || !isflt(av[3])) |
425 |
> |
if (!isflt(av[1]) | !isflt(av[2]) | !isflt(av[3])) |
426 |
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return(MG_ETYPE); |
427 |
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c_cvertex->n[0] = atof(av[1]); |
428 |
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c_cvertex->n[1] = atof(av[2]); |
529 |
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clr->cy = y / z; |
530 |
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clr->flags |= C_CSXY; |
531 |
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} else if (fl & C_CSSPEC) { /* cxy -> cspec */ |
532 |
< |
z = (cie_xf.ssum + cie_yf.ssum + cie_zf.ssum) / 3.; |
533 |
< |
x = clr->cx * z / cie_xf.ssum; |
534 |
< |
y = clr->cy * z / cie_yf.ssum; |
471 |
< |
z = (1. - clr->cx - clr->cy) * z / cie_zf.ssum; |
532 |
> |
x = clr->cx; |
533 |
> |
y = clr->cy; |
534 |
> |
z = 1. - x - y; |
535 |
|
clr->ssum = 0; |
536 |
< |
for (i = 0; i < C_CNSS; i++) |
537 |
< |
clr->ssum += clr->ssamp[i] = |
538 |
< |
x * cie_xf.ssamp[i] + |
539 |
< |
y * cie_yf.ssamp[i] + |
540 |
< |
z * cie_zf.ssamp[i] ; |
536 |
> |
for (i = 0; i < C_CNSS; i++) { |
537 |
> |
clr->ssamp[i] = x*cie_xp.ssamp[i] + y*cie_yp.ssamp[i] |
538 |
> |
+ z*cie_zp.ssamp[i] + .5; |
539 |
> |
if (clr->ssamp[i] < 0) /* out of gamut! */ |
540 |
> |
clr->ssamp[i] = 0; |
541 |
> |
else |
542 |
> |
clr->ssum += clr->ssamp[i]; |
543 |
> |
} |
544 |
|
clr->flags |= C_CSSPEC; |
545 |
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} |
546 |
|
if (fl & C_CSEFF) { /* compute efficacy */ |
547 |
< |
if (clr->flags & C_CDSPEC) { /* from spectrum */ |
547 |
> |
if (clr->flags & C_CSSPEC) { /* from spectrum */ |
548 |
|
y = 0.; |
549 |
|
for (i = 0; i < C_CNSS; i++) |
550 |
|
y += cie_yf.ssamp[i] * clr->ssamp[i]; |
551 |
|
clr->eff = C_CLPWM * y / clr->ssum; |
552 |
< |
} else /* clr->flags & C_CDXY */ { /* from (x,y) */ |
552 |
> |
} else /* clr->flags & C_CSXY */ { /* from (x,y) */ |
553 |
|
clr->eff = clr->cx*cie_xf.eff + clr->cy*cie_yf.eff + |
554 |
|
(1. - clr->cx - clr->cy)*cie_zf.eff; |
555 |
|
} |
571 |
|
int n, imax; |
572 |
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int wl; |
573 |
|
double wl0, wlstep; |
574 |
+ |
double boxpos, boxstep; |
575 |
|
/* check bounds */ |
576 |
< |
if (wlmax <= C_CMINWL | wlmax <= wlmin | wlmin >= C_CMAXWL) |
576 |
> |
if ((wlmax <= C_CMINWL) | (wlmax <= wlmin) | (wlmin >= C_CMAXWL)) |
577 |
|
return(MG_EILL); |
578 |
|
wlstep = (wlmax - wlmin)/(ac-1); |
579 |
|
while (wlmin < C_CMINWL) { |
584 |
|
wlmax -= wlstep; |
585 |
|
ac--; |
586 |
|
} |
520 |
– |
if (ac < 2) |
521 |
– |
return(MG_EILL); |
587 |
|
imax = ac; /* box filter if necessary */ |
588 |
+ |
boxpos = 0; |
589 |
+ |
boxstep = 1; |
590 |
|
if (wlstep < C_CWLI) { |
591 |
+ |
imax = (wlmax - wlmin)/C_CWLI + (1-FTINY); |
592 |
+ |
boxpos = (wlmin - C_CMINWL)/C_CWLI; |
593 |
+ |
boxstep = wlstep/C_CWLI; |
594 |
|
wlstep = C_CWLI; |
525 |
– |
imax = (wlmax - wlmin)/wlstep; |
595 |
|
} |
596 |
|
scale = 0.; /* get values and maximum */ |
597 |
|
pos = 0; |
598 |
|
for (i = 0; i < imax; i++) { |
599 |
|
va[i] = 0.; n = 0; |
600 |
< |
while (pos < (i+.5)*ac/imax) { |
600 |
> |
while (boxpos < i+.5 && pos < ac) { |
601 |
|
if (!isflt(av[pos])) |
602 |
|
return(MG_ETYPE); |
603 |
|
va[i] += atof(av[pos++]); |
604 |
|
n++; |
605 |
+ |
boxpos += boxstep; |
606 |
|
} |
607 |
|
if (n > 1) |
608 |
|
va[i] /= (double)n; |
539 |
– |
if (va[i] < 0.) |
540 |
– |
return(MG_EILL); |
609 |
|
if (va[i] > scale) |
610 |
|
scale = va[i]; |
611 |
+ |
else if (va[i] < -scale) |
612 |
+ |
scale = -va[i]; |
613 |
|
} |
614 |
< |
if (scale == 0.) |
614 |
> |
if (scale <= FTINY) |
615 |
|
return(MG_EILL); |
616 |
|
scale = C_CMAXV / scale; |
617 |
|
clr->ssum = 0; /* convert to our spacing */ |
618 |
|
wl0 = wlmin; |
619 |
|
pos = 0; |
620 |
|
for (i = 0, wl = C_CMINWL; i < C_CNSS; i++, wl += C_CWLI) |
621 |
< |
if (wl < wlmin | wl > wlmax) |
621 |
> |
if ((wl < wlmin) | (wl > wlmax)) |
622 |
|
clr->ssamp[i] = 0; |
623 |
|
else { |
624 |
|
while (wl0 + wlstep < wl+FTINY) { |
625 |
|
wl0 += wlstep; |
626 |
|
pos++; |
627 |
|
} |
628 |
< |
if (wl+FTINY >= wl0 & wl-FTINY <= wl0) |
629 |
< |
clr->ssamp[i] = scale*va[pos]; |
628 |
> |
if ((wl+FTINY >= wl0) & (wl-FTINY <= wl0)) |
629 |
> |
clr->ssamp[i] = scale*va[pos] + .5; |
630 |
|
else /* interpolate if necessary */ |
631 |
< |
clr->ssamp[i] = scale / wlstep * |
631 |
> |
clr->ssamp[i] = .5 + scale / wlstep * |
632 |
|
( va[pos]*(wl0+wlstep - wl) + |
633 |
|
va[pos+1]*(wl - wl0) ); |
634 |
|
clr->ssum += clr->ssamp[i]; |
667 |
|
} else { /* CIE xy mixing */ |
668 |
|
c_ccvt(c1, C_CSXY); |
669 |
|
c_ccvt(c2, C_CSXY); |
670 |
< |
scale = 1. / (w1/c1->cy + w2/c2->cy); |
670 |
> |
scale = w1/c1->cy + w2/c2->cy; |
671 |
> |
if (scale == 0.) |
672 |
> |
return; |
673 |
> |
scale = 1. / scale; |
674 |
|
cres->cx = (c1->cx*w1/c1->cy + c2->cx*w2/c2->cy) * scale; |
675 |
|
cres->cy = (w1 + w2) * scale; |
676 |
|
cres->flags = C_CDXY|C_CSXY; |
677 |
|
} |
678 |
|
} |
679 |
+ |
|
680 |
+ |
|
681 |
+ |
#define C1 3.741832e-16 /* W-m^2 */ |
682 |
+ |
#define C2 1.4388e-2 /* m-K */ |
683 |
+ |
|
684 |
+ |
#define bbsp(l,t) (C1/((l)*(l)*(l)*(l)*(l)*(exp(C2/((t)*(l)))-1.))) |
685 |
+ |
#define bblm(t) (C2/5./(t)) |
686 |
+ |
|
687 |
+ |
static int |
688 |
+ |
setbbtemp(clr, tk) /* set black body spectrum */ |
689 |
+ |
register C_COLOR *clr; |
690 |
+ |
double tk; |
691 |
+ |
{ |
692 |
+ |
double sf, wl; |
693 |
+ |
register int i; |
694 |
+ |
|
695 |
+ |
if (tk < 1000) |
696 |
+ |
return(MG_EILL); |
697 |
+ |
wl = bblm(tk); /* scalefactor based on peak */ |
698 |
+ |
if (wl < C_CMINWL*1e-9) |
699 |
+ |
wl = C_CMINWL*1e-9; |
700 |
+ |
else if (wl > C_CMAXWL*1e-9) |
701 |
+ |
wl = C_CMAXWL*1e-9; |
702 |
+ |
sf = C_CMAXV/bbsp(wl,tk); |
703 |
+ |
clr->ssum = 0; |
704 |
+ |
for (i = 0; i < C_CNSS; i++) { |
705 |
+ |
wl = (C_CMINWL + i*C_CWLI)*1e-9; |
706 |
+ |
clr->ssum += clr->ssamp[i] = sf*bbsp(wl,tk) + .5; |
707 |
+ |
} |
708 |
+ |
clr->flags = C_CDSPEC|C_CSSPEC; |
709 |
+ |
clr->clock++; |
710 |
+ |
return(MG_OK); |
711 |
+ |
} |
712 |
+ |
|
713 |
+ |
#undef C1 |
714 |
+ |
#undef C2 |
715 |
+ |
#undef bbsp |
716 |
+ |
#undef bblm |