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/* Copyright (c) 1994 Regents of the University of California */ |
2 |
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#ifndef lint |
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< |
static char SCCSid[] = "$SunId$ LBL"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
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#endif |
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|
4 |
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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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|
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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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|
32 |
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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 curves */ |
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static C_COLOR cie_xf = { 1, C_CDSPEC|C_CSSPEC|C_CSXY|C_CSEFF, |
41 |
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{14,42,143,435,1344,2839,3483,3362,2908,1954,956, |
42 |
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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, C_CDSPEC|C_CSSPEC|C_CSXY|C_CSEFF, |
47 |
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{0,1,4,12,40,116,230,380,600,910,1390,2080,3230, |
48 |
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5030,7100,8620,9540,9950,9950,9520,8700,7570,6310, |
49 |
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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, 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, |
55 |
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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 |
57 |
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}; |
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/* Derived CIE 1931 Primaries (imaginary) */ |
59 |
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static C_COLOR cie_xp = { 1, C_CDSPEC|C_CSSPEC|C_CSXY, |
60 |
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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, C_CDSPEC|C_CSSPEC|C_CSXY, |
68 |
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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, 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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|
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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_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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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. | |
107 |
< |
c_ccolor->cx + c_ccolor->cy > 1.) |
106 |
> |
if ((c_ccolor->cx < 0.) | (c_ccolor->cy < 0.) | |
107 |
> |
(c_ccolor->cx + c_ccolor->cy > 1.)) |
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return(MG_EILL); |
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c_ccolor->clock++; |
110 |
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return(MG_OK); |
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return(MG_EARGC); |
121 |
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if (!isflt(av[1])) |
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return(MG_ETYPE); |
123 |
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return(setbbtemp(c_ccolor, atof(av[1]))); |
123 |
> |
if (!c_bbtemp(c_ccolor, atof(av[1]))) |
124 |
> |
return(MG_EILL); |
125 |
> |
c_ccolor->clock++; |
126 |
> |
return(MG_OK); |
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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); |
130 |
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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) |
139 |
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if (!isflt(av[i])) |
140 |
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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) |
143 |
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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, |
146 |
> |
c_cmix(c_ccolor, wsum, c_ccolor, |
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w, (C_COLOR *)lp->data); |
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wsum += w; |
149 |
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} |
150 |
+ |
if (wsum <= 0.) |
151 |
+ |
return(MG_EILL); |
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c_ccolor->clock++; |
153 |
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return(MG_OK); |
154 |
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} |
174 |
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c_cmname = NULL; |
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return(MG_OK); |
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} |
177 |
+ |
if (!isname(av[1])) |
178 |
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return(MG_EILL); |
179 |
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lp = lu_find(&mat_tab, av[1]); /* lookup context */ |
180 |
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if (lp == NULL) |
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return(MG_EMEM); |
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c_cmname = lp->key; |
200 |
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c_cmaterial = (C_MATERIAL *)lp->data; |
201 |
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c_cmaterial->clock = 0; |
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+ |
c_cmaterial->client_data = NULL; |
203 |
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} |
204 |
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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; |
217 |
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return(MG_OK); |
218 |
+ |
case MG_E_IR: /* set index of refraction */ |
219 |
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if (ac != 3) |
220 |
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return(MG_EARGC); |
221 |
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if (!isflt(av[1]) | !isflt(av[2])) |
222 |
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return(MG_ETYPE); |
223 |
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c_cmaterial->nr = atof(av[1]); |
224 |
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c_cmaterial->ni = atof(av[2]); |
225 |
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if (c_cmaterial->nr <= FTINY) |
226 |
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return(MG_EILL); |
227 |
+ |
c_cmaterial->clock++; |
228 |
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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.) |
235 |
> |
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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if (!isflt(av[1])) |
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return(MG_ETYPE); |
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c_cmaterial->td = atof(av[1]); |
257 |
< |
if (c_cmaterial->td < 0. | c_cmaterial->td > 1.) |
257 |
> |
if ((c_cmaterial->td < 0.) | (c_cmaterial->td > 1.)) |
258 |
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return(MG_EILL); |
259 |
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c_cmaterial->td_c = *c_ccolor; |
260 |
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c_cmaterial->clock++; |
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return(MG_ETYPE); |
267 |
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c_cmaterial->rs = atof(av[1]); |
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c_cmaterial->rs_a = atof(av[2]); |
269 |
< |
if (c_cmaterial->rs < 0. | c_cmaterial->rs > 1. | |
270 |
< |
c_cmaterial->rs_a < 0.) |
269 |
> |
if ((c_cmaterial->rs < 0.) | (c_cmaterial->rs > 1.) | |
270 |
> |
(c_cmaterial->rs_a < 0.)) |
271 |
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return(MG_EILL); |
272 |
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c_cmaterial->rs_c = *c_ccolor; |
273 |
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c_cmaterial->clock++; |
279 |
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return(MG_ETYPE); |
280 |
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c_cmaterial->ts = atof(av[1]); |
281 |
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c_cmaterial->ts_a = atof(av[2]); |
282 |
< |
if (c_cmaterial->ts < 0. | c_cmaterial->ts > 1. | |
283 |
< |
c_cmaterial->ts_a < 0.) |
282 |
> |
if ((c_cmaterial->ts < 0.) | (c_cmaterial->ts > 1.) | |
283 |
> |
(c_cmaterial->ts_a < 0.)) |
284 |
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return(MG_EILL); |
285 |
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c_cmaterial->ts_c = *c_ccolor; |
286 |
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c_cmaterial->clock++; |
322 |
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c_cvname = NULL; |
323 |
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return(MG_OK); |
324 |
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} |
325 |
+ |
if (!isname(av[1])) |
326 |
+ |
return(MG_EILL); |
327 |
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lp = lu_find(&vtx_tab, av[1]); /* lookup context */ |
328 |
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if (lp == NULL) |
329 |
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return(MG_EMEM); |
346 |
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return(MG_EMEM); |
347 |
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c_cvname = lp->key; |
348 |
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c_cvertex = (C_VERTEX *)lp->data; |
349 |
+ |
c_cvertex->clock = 0; |
350 |
+ |
c_cvertex->client_data = NULL; |
351 |
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} |
352 |
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i = c_cvertex->clock; |
353 |
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if (ac == 3) { /* use default template */ |
443 |
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} |
444 |
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|
445 |
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|
475 |
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int |
476 |
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c_isgrey(clr) /* check if color is grey */ |
477 |
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register C_COLOR *clr; |
478 |
– |
{ |
479 |
– |
if (!(clr->flags & (C_CSXY|C_CSSPEC))) |
480 |
– |
return(1); /* no settings == grey */ |
481 |
– |
c_ccvt(clr, C_CSXY); |
482 |
– |
return(clr->cx >= .323 && clr->cx <= .343 && |
483 |
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clr->cy >= .323 && clr->cy <= .343); |
484 |
– |
} |
485 |
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|
486 |
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|
487 |
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void |
488 |
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c_ccvt(clr, fl) /* convert color representations */ |
489 |
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register C_COLOR *clr; |
490 |
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int fl; |
491 |
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{ |
492 |
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double x, y, z; |
493 |
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register int i; |
494 |
– |
|
495 |
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fl &= ~clr->flags; /* ignore what's done */ |
496 |
– |
if (!fl) /* everything's done! */ |
497 |
– |
return; |
498 |
– |
if (!(clr->flags & (C_CSXY|C_CSSPEC))) /* nothing set! */ |
499 |
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*clr = c_dfcolor; |
500 |
– |
if (fl & C_CSXY) { /* cspec -> cxy */ |
501 |
– |
x = y = z = 0.; |
502 |
– |
for (i = 0; i < C_CNSS; i++) { |
503 |
– |
x += cie_xf.ssamp[i] * clr->ssamp[i]; |
504 |
– |
y += cie_yf.ssamp[i] * clr->ssamp[i]; |
505 |
– |
z += cie_zf.ssamp[i] * clr->ssamp[i]; |
506 |
– |
} |
507 |
– |
x /= (double)cie_xf.ssum; |
508 |
– |
y /= (double)cie_yf.ssum; |
509 |
– |
z /= (double)cie_zf.ssum; |
510 |
– |
z += x + y; |
511 |
– |
clr->cx = x / z; |
512 |
– |
clr->cy = y / z; |
513 |
– |
clr->flags |= C_CSXY; |
514 |
– |
} else if (fl & C_CSSPEC) { /* cxy -> cspec */ |
515 |
– |
x = clr->cx; |
516 |
– |
y = clr->cy; |
517 |
– |
z = 1. - x - y; |
518 |
– |
clr->ssum = 0; |
519 |
– |
for (i = 0; i < C_CNSS; i++) { |
520 |
– |
clr->ssamp[i] = x*cie_xp.ssamp[i] + y*cie_yp.ssamp[i] |
521 |
– |
+ z*cie_zp.ssamp[i] + .5; |
522 |
– |
if (clr->ssamp[i] < 0) /* out of gamut! */ |
523 |
– |
clr->ssamp[i] = 0; |
524 |
– |
else |
525 |
– |
clr->ssum += clr->ssamp[i]; |
526 |
– |
} |
527 |
– |
clr->flags |= C_CSSPEC; |
528 |
– |
} |
529 |
– |
if (fl & C_CSEFF) { /* compute efficacy */ |
530 |
– |
if (clr->flags & C_CSSPEC) { /* from spectrum */ |
531 |
– |
y = 0.; |
532 |
– |
for (i = 0; i < C_CNSS; i++) |
533 |
– |
y += cie_yf.ssamp[i] * clr->ssamp[i]; |
534 |
– |
clr->eff = C_CLPWM * y / clr->ssum; |
535 |
– |
} else /* clr->flags & C_CSXY */ { /* from (x,y) */ |
536 |
– |
clr->eff = clr->cx*cie_xf.eff + clr->cy*cie_yf.eff + |
537 |
– |
(1. - clr->cx - clr->cy)*cie_zf.eff; |
538 |
– |
} |
539 |
– |
clr->flags |= C_CSEFF; |
540 |
– |
} |
541 |
– |
} |
542 |
– |
|
543 |
– |
|
446 |
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static int |
447 |
|
setspectrum(clr, wlmin, wlmax, ac, av) /* convert a spectrum */ |
448 |
|
register C_COLOR *clr; |
456 |
|
int n, imax; |
457 |
|
int wl; |
458 |
|
double wl0, wlstep; |
459 |
+ |
double boxpos, boxstep; |
460 |
|
/* check bounds */ |
461 |
< |
if (wlmax <= C_CMINWL | wlmax <= wlmin | wlmin >= C_CMAXWL) |
461 |
> |
if ((wlmax <= C_CMINWL) | (wlmax <= wlmin) | (wlmin >= C_CMAXWL)) |
462 |
|
return(MG_EILL); |
463 |
|
wlstep = (wlmax - wlmin)/(ac-1); |
464 |
|
while (wlmin < C_CMINWL) { |
469 |
|
wlmax -= wlstep; |
470 |
|
ac--; |
471 |
|
} |
569 |
– |
if (ac < 2) |
570 |
– |
return(MG_EILL); |
472 |
|
imax = ac; /* box filter if necessary */ |
473 |
+ |
boxpos = 0; |
474 |
+ |
boxstep = 1; |
475 |
|
if (wlstep < C_CWLI) { |
476 |
+ |
imax = (wlmax - wlmin)/C_CWLI + (1-FTINY); |
477 |
+ |
boxpos = (wlmin - C_CMINWL)/C_CWLI; |
478 |
+ |
boxstep = wlstep/C_CWLI; |
479 |
|
wlstep = C_CWLI; |
574 |
– |
imax = (wlmax - wlmin)/wlstep; |
480 |
|
} |
481 |
|
scale = 0.; /* get values and maximum */ |
482 |
|
pos = 0; |
483 |
|
for (i = 0; i < imax; i++) { |
484 |
|
va[i] = 0.; n = 0; |
485 |
< |
while (pos < (i+.5)*ac/imax) { |
485 |
> |
while (boxpos < i+.5 && pos < ac) { |
486 |
|
if (!isflt(av[pos])) |
487 |
|
return(MG_ETYPE); |
488 |
|
va[i] += atof(av[pos++]); |
489 |
|
n++; |
490 |
+ |
boxpos += boxstep; |
491 |
|
} |
492 |
|
if (n > 1) |
493 |
|
va[i] /= (double)n; |
588 |
– |
if (va[i] < 0.) |
589 |
– |
return(MG_EILL); |
494 |
|
if (va[i] > scale) |
495 |
|
scale = va[i]; |
496 |
+ |
else if (va[i] < -scale) |
497 |
+ |
scale = -va[i]; |
498 |
|
} |
499 |
< |
if (scale == 0.) |
499 |
> |
if (scale <= FTINY) |
500 |
|
return(MG_EILL); |
501 |
|
scale = C_CMAXV / scale; |
502 |
|
clr->ssum = 0; /* convert to our spacing */ |
503 |
|
wl0 = wlmin; |
504 |
|
pos = 0; |
505 |
|
for (i = 0, wl = C_CMINWL; i < C_CNSS; i++, wl += C_CWLI) |
506 |
< |
if (wl < wlmin | wl > wlmax) |
506 |
> |
if ((wl < wlmin) | (wl > wlmax)) |
507 |
|
clr->ssamp[i] = 0; |
508 |
|
else { |
509 |
|
while (wl0 + wlstep < wl+FTINY) { |
510 |
|
wl0 += wlstep; |
511 |
|
pos++; |
512 |
|
} |
513 |
< |
if (wl+FTINY >= wl0 & wl-FTINY <= wl0) |
513 |
> |
if ((wl+FTINY >= wl0) & (wl-FTINY <= wl0)) |
514 |
|
clr->ssamp[i] = scale*va[pos] + .5; |
515 |
|
else /* interpolate if necessary */ |
516 |
|
clr->ssamp[i] = .5 + scale / wlstep * |
522 |
|
clr->clock++; |
523 |
|
return(MG_OK); |
524 |
|
} |
619 |
– |
|
620 |
– |
|
621 |
– |
static void |
622 |
– |
mixcolors(cres, w1, c1, w2, c2) /* mix two colors according to weights given */ |
623 |
– |
register C_COLOR *cres, *c1, *c2; |
624 |
– |
double w1, w2; |
625 |
– |
{ |
626 |
– |
double scale; |
627 |
– |
float cmix[C_CNSS]; |
628 |
– |
register int i; |
629 |
– |
|
630 |
– |
if ((c1->flags|c2->flags) & C_CDSPEC) { /* spectral mixing */ |
631 |
– |
c_ccvt(c1, C_CSSPEC|C_CSEFF); |
632 |
– |
c_ccvt(c2, C_CSSPEC|C_CSEFF); |
633 |
– |
w1 /= c1->eff*c1->ssum; |
634 |
– |
w2 /= c2->eff*c2->ssum; |
635 |
– |
scale = 0.; |
636 |
– |
for (i = 0; i < C_CNSS; i++) { |
637 |
– |
cmix[i] = w1*c1->ssamp[i] + w2*c2->ssamp[i]; |
638 |
– |
if (cmix[i] > scale) |
639 |
– |
scale = cmix[i]; |
640 |
– |
} |
641 |
– |
scale = C_CMAXV / scale; |
642 |
– |
cres->ssum = 0; |
643 |
– |
for (i = 0; i < C_CNSS; i++) |
644 |
– |
cres->ssum += cres->ssamp[i] = scale*cmix[i] + .5; |
645 |
– |
cres->flags = C_CDSPEC|C_CSSPEC; |
646 |
– |
} else { /* CIE xy mixing */ |
647 |
– |
c_ccvt(c1, C_CSXY); |
648 |
– |
c_ccvt(c2, C_CSXY); |
649 |
– |
scale = 1. / (w1/c1->cy + w2/c2->cy); |
650 |
– |
cres->cx = (c1->cx*w1/c1->cy + c2->cx*w2/c2->cy) * scale; |
651 |
– |
cres->cy = (w1 + w2) * scale; |
652 |
– |
cres->flags = C_CDXY|C_CSXY; |
653 |
– |
} |
654 |
– |
} |
655 |
– |
|
656 |
– |
|
657 |
– |
#define C1 3.741832e-16 /* W-m^2 */ |
658 |
– |
#define C2 1.4388e-2 /* m-K */ |
659 |
– |
|
660 |
– |
#define bbsp(l,t) (C1/((l)*(l)*(l)*(l)*(l)*(exp(C2/((t)*(l)))-1.))) |
661 |
– |
#define bblm(t) (C2/5./(t)) |
662 |
– |
|
663 |
– |
static int |
664 |
– |
setbbtemp(clr, tk) /* set black body spectrum */ |
665 |
– |
register C_COLOR *clr; |
666 |
– |
double tk; |
667 |
– |
{ |
668 |
– |
double sf, wl; |
669 |
– |
register int i; |
670 |
– |
|
671 |
– |
if (tk < 1000) |
672 |
– |
return(MG_EILL); |
673 |
– |
wl = bblm(tk); /* scalefactor based on peak */ |
674 |
– |
if (wl < C_CMINWL*1e-9) |
675 |
– |
wl = C_CMINWL*1e-9; |
676 |
– |
else if (wl > C_CMAXWL*1e-9) |
677 |
– |
wl = C_CMAXWL*1e-9; |
678 |
– |
sf = C_CMAXV/bbsp(wl,tk); |
679 |
– |
clr->ssum = 0; |
680 |
– |
for (i = 0; i < C_CNSS; i++) { |
681 |
– |
wl = (C_CMINWL + i*C_CWLI)*1e-9; |
682 |
– |
clr->ssum += clr->ssamp[i] = sf*bbsp(wl,tk) + .5; |
683 |
– |
} |
684 |
– |
clr->flags = C_CDSPEC|C_CSSPEC; |
685 |
– |
clr->clock++; |
686 |
– |
return(MG_OK); |
687 |
– |
} |
688 |
– |
|
689 |
– |
#undef C1 |
690 |
– |
#undef C2 |
691 |
– |
#undef bbsp |
692 |
– |
#undef bblm |