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greg |
3.1 |
#ifndef lint |
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greg |
3.2 |
static const char RCSid[] = "$Id: mgf_context.c,v 3.1 2011/02/18 00:40:25 greg Exp $"; |
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greg |
3.1 |
#endif |
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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 <stdlib.h> |
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#include <string.h> |
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#include "mgf_parser.h" |
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#include "lookup.h" |
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/* default context values */ |
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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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/* 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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/* 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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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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greg |
3.2 |
static int setspectrum(C_COLOR *, int ac, char **av); |
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greg |
3.1 |
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int |
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c_hcolor(int ac, char **av) /* handle color entity */ |
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{ |
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double w, wsum; |
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greg |
3.2 |
int i; |
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LUENT *lp; |
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greg |
3.1 |
|
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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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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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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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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 = 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 */ |
110 |
greg |
3.2 |
return(setspectrum(c_ccolor, ac-1, av+1)); |
111 |
greg |
3.1 |
case MG_E_CCT: /* assign black body spectrum */ |
112 |
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if (ac != 2) |
113 |
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return(MG_EARGC); |
114 |
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if (!isflt(av[1])) |
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return(MG_ETYPE); |
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if (!c_bbtemp(c_ccolor, atof(av[1]))) |
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return(MG_EILL); |
118 |
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c_ccolor->clock++; |
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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); |
123 |
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if (!isflt(av[1])) |
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return(MG_ETYPE); |
125 |
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wsum = atof(av[1]); |
126 |
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if ((lp = lu_find(&clr_tab, av[2])) == NULL) |
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return(MG_EMEM); |
128 |
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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) { |
132 |
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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 ((lp = lu_find(&clr_tab, av[i+1])) == NULL) |
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return(MG_EMEM); |
137 |
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if (lp->data == NULL) |
138 |
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return(MG_EUNDEF); |
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c_cmix(c_ccolor, wsum, c_ccolor, |
140 |
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w, (C_COLOR *)lp->data); |
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wsum += w; |
142 |
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} |
143 |
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if (wsum <= 0.) |
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return(MG_EILL); |
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c_ccolor->clock++; |
146 |
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return(MG_OK); |
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} |
148 |
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return(MG_EUNK); |
149 |
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} |
150 |
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152 |
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int |
153 |
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c_hmaterial(int ac, char **av) /* handle material entity */ |
154 |
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{ |
155 |
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int i; |
156 |
greg |
3.2 |
LUENT *lp; |
157 |
greg |
3.1 |
|
158 |
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switch (mg_entity(av[0])) { |
159 |
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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; |
165 |
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c_cmname = NULL; |
166 |
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return(MG_OK); |
167 |
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} |
168 |
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if (!isname(av[1])) |
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return(MG_EILL); |
170 |
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lp = lu_find(&mat_tab, av[1]); /* lookup context */ |
171 |
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if (lp == NULL) |
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return(MG_EMEM); |
173 |
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c_cmname = lp->key; |
174 |
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c_cmaterial = (C_MATERIAL *)lp->data; |
175 |
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if (ac == 2) { /* reestablish previous context */ |
176 |
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if (c_cmaterial == NULL) |
177 |
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return(MG_EUNDEF); |
178 |
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return(MG_OK); |
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} |
180 |
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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 */ |
183 |
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lp->key = (char *)malloc(strlen(av[1])+1); |
184 |
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if (lp->key == NULL) |
185 |
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return(MG_EMEM); |
186 |
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strcpy(lp->key, av[1]); |
187 |
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lp->data = (char *)malloc(sizeof(C_MATERIAL)); |
188 |
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if (lp->data == NULL) |
189 |
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return(MG_EMEM); |
190 |
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c_cmname = lp->key; |
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c_cmaterial = (C_MATERIAL *)lp->data; |
192 |
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c_cmaterial->clock = 0; |
193 |
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c_cmaterial->client_data = NULL; |
194 |
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} |
195 |
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i = c_cmaterial->clock; |
196 |
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if (ac == 3) { /* use default template */ |
197 |
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*c_cmaterial = c_dfmaterial; |
198 |
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c_cmaterial->clock = i + 1; |
199 |
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return(MG_OK); |
200 |
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} |
201 |
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lp = lu_find(&mat_tab, av[3]); /* lookup template */ |
202 |
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if (lp == NULL) |
203 |
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return(MG_EMEM); |
204 |
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if (lp->data == NULL) |
205 |
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return(MG_EUNDEF); |
206 |
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*c_cmaterial = *(C_MATERIAL *)lp->data; |
207 |
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c_cmaterial->clock = i + 1; |
208 |
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return(MG_OK); |
209 |
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case MG_E_IR: /* set index of refraction */ |
210 |
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if (ac != 3) |
211 |
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return(MG_EARGC); |
212 |
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if (!isflt(av[1]) | !isflt(av[2])) |
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return(MG_ETYPE); |
214 |
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c_cmaterial->nr = atof(av[1]); |
215 |
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c_cmaterial->ni = atof(av[2]); |
216 |
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if (c_cmaterial->nr <= FTINY) |
217 |
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return(MG_EILL); |
218 |
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c_cmaterial->clock++; |
219 |
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return(MG_OK); |
220 |
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case MG_E_RD: /* set diffuse reflectance */ |
221 |
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if (ac != 2) |
222 |
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return(MG_EARGC); |
223 |
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if (!isflt(av[1])) |
224 |
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return(MG_ETYPE); |
225 |
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c_cmaterial->rd = atof(av[1]); |
226 |
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if ((c_cmaterial->rd < 0.) | (c_cmaterial->rd > 1.)) |
227 |
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return(MG_EILL); |
228 |
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c_cmaterial->rd_c = *c_ccolor; |
229 |
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c_cmaterial->clock++; |
230 |
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return(MG_OK); |
231 |
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case MG_E_ED: /* set diffuse emittance */ |
232 |
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if (ac != 2) |
233 |
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return(MG_EARGC); |
234 |
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if (!isflt(av[1])) |
235 |
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return(MG_ETYPE); |
236 |
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c_cmaterial->ed = atof(av[1]); |
237 |
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if (c_cmaterial->ed < 0.) |
238 |
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return(MG_EILL); |
239 |
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c_cmaterial->ed_c = *c_ccolor; |
240 |
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c_cmaterial->clock++; |
241 |
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return(MG_OK); |
242 |
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case MG_E_TD: /* set diffuse transmittance */ |
243 |
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if (ac != 2) |
244 |
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return(MG_EARGC); |
245 |
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if (!isflt(av[1])) |
246 |
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return(MG_ETYPE); |
247 |
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c_cmaterial->td = atof(av[1]); |
248 |
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if ((c_cmaterial->td < 0.) | (c_cmaterial->td > 1.)) |
249 |
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return(MG_EILL); |
250 |
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c_cmaterial->td_c = *c_ccolor; |
251 |
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c_cmaterial->clock++; |
252 |
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return(MG_OK); |
253 |
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case MG_E_RS: /* set specular reflectance */ |
254 |
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if (ac != 3) |
255 |
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return(MG_EARGC); |
256 |
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if (!isflt(av[1]) | !isflt(av[2])) |
257 |
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return(MG_ETYPE); |
258 |
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c_cmaterial->rs = atof(av[1]); |
259 |
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c_cmaterial->rs_a = atof(av[2]); |
260 |
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if ((c_cmaterial->rs < 0.) | (c_cmaterial->rs > 1.) | |
261 |
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(c_cmaterial->rs_a < 0.)) |
262 |
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return(MG_EILL); |
263 |
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c_cmaterial->rs_c = *c_ccolor; |
264 |
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c_cmaterial->clock++; |
265 |
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return(MG_OK); |
266 |
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case MG_E_TS: /* set specular transmittance */ |
267 |
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if (ac != 3) |
268 |
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return(MG_EARGC); |
269 |
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if (!isflt(av[1]) | !isflt(av[2])) |
270 |
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return(MG_ETYPE); |
271 |
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c_cmaterial->ts = atof(av[1]); |
272 |
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c_cmaterial->ts_a = atof(av[2]); |
273 |
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if ((c_cmaterial->ts < 0.) | (c_cmaterial->ts > 1.) | |
274 |
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(c_cmaterial->ts_a < 0.)) |
275 |
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return(MG_EILL); |
276 |
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c_cmaterial->ts_c = *c_ccolor; |
277 |
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c_cmaterial->clock++; |
278 |
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return(MG_OK); |
279 |
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case MG_E_SIDES: /* set number of sides */ |
280 |
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if (ac != 2) |
281 |
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return(MG_EARGC); |
282 |
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if (!isint(av[1])) |
283 |
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return(MG_ETYPE); |
284 |
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i = atoi(av[1]); |
285 |
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if (i == 1) |
286 |
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c_cmaterial->sided = 1; |
287 |
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else if (i == 2) |
288 |
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c_cmaterial->sided = 0; |
289 |
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else |
290 |
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return(MG_EILL); |
291 |
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c_cmaterial->clock++; |
292 |
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return(MG_OK); |
293 |
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} |
294 |
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return(MG_EUNK); |
295 |
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} |
296 |
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297 |
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298 |
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int |
299 |
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c_hvertex(int ac, char **av) /* handle a vertex entity */ |
300 |
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{ |
301 |
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int i; |
302 |
greg |
3.2 |
LUENT *lp; |
303 |
greg |
3.1 |
|
304 |
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switch (mg_entity(av[0])) { |
305 |
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case MG_E_VERTEX: /* get/set vertex context */ |
306 |
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if (ac > 4) |
307 |
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return(MG_EARGC); |
308 |
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if (ac == 1) { /* set unnamed vertex context */ |
309 |
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c_unvertex = c_dfvertex; |
310 |
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c_cvertex = &c_unvertex; |
311 |
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c_cvname = NULL; |
312 |
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return(MG_OK); |
313 |
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} |
314 |
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if (!isname(av[1])) |
315 |
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return(MG_EILL); |
316 |
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lp = lu_find(&vtx_tab, av[1]); /* lookup context */ |
317 |
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if (lp == NULL) |
318 |
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return(MG_EMEM); |
319 |
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c_cvname = lp->key; |
320 |
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c_cvertex = (C_VERTEX *)lp->data; |
321 |
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if (ac == 2) { /* reestablish previous context */ |
322 |
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if (c_cvertex == NULL) |
323 |
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return(MG_EUNDEF); |
324 |
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return(MG_OK); |
325 |
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} |
326 |
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if (av[2][0] != '=' || av[2][1]) |
327 |
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return(MG_ETYPE); |
328 |
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if (c_cvertex == NULL) { /* create new vertex context */ |
329 |
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lp->key = (char *)malloc(strlen(av[1])+1); |
330 |
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if (lp->key == NULL) |
331 |
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return(MG_EMEM); |
332 |
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strcpy(lp->key, av[1]); |
333 |
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lp->data = (char *)malloc(sizeof(C_VERTEX)); |
334 |
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if (lp->data == NULL) |
335 |
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return(MG_EMEM); |
336 |
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c_cvname = lp->key; |
337 |
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c_cvertex = (C_VERTEX *)lp->data; |
338 |
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c_cvertex->clock = 0; |
339 |
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c_cvertex->client_data = NULL; |
340 |
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} |
341 |
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i = c_cvertex->clock; |
342 |
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if (ac == 3) { /* use default template */ |
343 |
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*c_cvertex = c_dfvertex; |
344 |
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c_cvertex->clock = i + 1; |
345 |
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return(MG_OK); |
346 |
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} |
347 |
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lp = lu_find(&vtx_tab, av[3]); /* lookup template */ |
348 |
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if (lp == NULL) |
349 |
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return(MG_EMEM); |
350 |
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if (lp->data == NULL) |
351 |
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return(MG_EUNDEF); |
352 |
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*c_cvertex = *(C_VERTEX *)lp->data; |
353 |
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c_cvertex->clock = i + 1; |
354 |
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return(MG_OK); |
355 |
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case MG_E_POINT: /* set point */ |
356 |
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if (ac != 4) |
357 |
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return(MG_EARGC); |
358 |
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if (!isflt(av[1]) | !isflt(av[2]) | !isflt(av[3])) |
359 |
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return(MG_ETYPE); |
360 |
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c_cvertex->p[0] = atof(av[1]); |
361 |
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c_cvertex->p[1] = atof(av[2]); |
362 |
|
|
c_cvertex->p[2] = atof(av[3]); |
363 |
|
|
c_cvertex->clock++; |
364 |
|
|
return(MG_OK); |
365 |
|
|
case MG_E_NORMAL: /* set normal */ |
366 |
|
|
if (ac != 4) |
367 |
|
|
return(MG_EARGC); |
368 |
|
|
if (!isflt(av[1]) | !isflt(av[2]) | !isflt(av[3])) |
369 |
|
|
return(MG_ETYPE); |
370 |
|
|
c_cvertex->n[0] = atof(av[1]); |
371 |
|
|
c_cvertex->n[1] = atof(av[2]); |
372 |
|
|
c_cvertex->n[2] = atof(av[3]); |
373 |
|
|
(void)normalize(c_cvertex->n); |
374 |
|
|
c_cvertex->clock++; |
375 |
|
|
return(MG_OK); |
376 |
|
|
} |
377 |
|
|
return(MG_EUNK); |
378 |
|
|
} |
379 |
|
|
|
380 |
|
|
|
381 |
|
|
void |
382 |
|
|
c_clearall(void) /* empty context tables */ |
383 |
|
|
{ |
384 |
|
|
c_uncolor = c_dfcolor; |
385 |
|
|
c_ccolor = &c_uncolor; |
386 |
|
|
c_ccname = NULL; |
387 |
|
|
lu_done(&clr_tab); |
388 |
|
|
c_unmaterial = c_dfmaterial; |
389 |
|
|
c_cmaterial = &c_unmaterial; |
390 |
|
|
c_cmname = NULL; |
391 |
|
|
lu_done(&mat_tab); |
392 |
|
|
c_unvertex = c_dfvertex; |
393 |
|
|
c_cvertex = &c_unvertex; |
394 |
|
|
c_cvname = NULL; |
395 |
|
|
lu_done(&vtx_tab); |
396 |
|
|
} |
397 |
|
|
|
398 |
|
|
|
399 |
|
|
C_MATERIAL * |
400 |
|
|
c_getmaterial(char *name) /* get a named material */ |
401 |
|
|
{ |
402 |
greg |
3.2 |
LUENT *lp; |
403 |
greg |
3.1 |
|
404 |
|
|
if ((lp = lu_find(&mat_tab, name)) == NULL) |
405 |
|
|
return(NULL); |
406 |
|
|
return((C_MATERIAL *)lp->data); |
407 |
|
|
} |
408 |
|
|
|
409 |
|
|
|
410 |
|
|
C_VERTEX * |
411 |
|
|
c_getvert(char *name) /* get a named vertex */ |
412 |
|
|
{ |
413 |
greg |
3.2 |
LUENT *lp; |
414 |
greg |
3.1 |
|
415 |
|
|
if ((lp = lu_find(&vtx_tab, name)) == NULL) |
416 |
|
|
return(NULL); |
417 |
|
|
return((C_VERTEX *)lp->data); |
418 |
|
|
} |
419 |
|
|
|
420 |
|
|
|
421 |
|
|
C_COLOR * |
422 |
|
|
c_getcolor(char *name) /* get a named color */ |
423 |
|
|
{ |
424 |
greg |
3.2 |
LUENT *lp; |
425 |
greg |
3.1 |
|
426 |
|
|
if ((lp = lu_find(&clr_tab, name)) == NULL) |
427 |
|
|
return(NULL); |
428 |
|
|
return((C_COLOR *)lp->data); |
429 |
|
|
} |
430 |
|
|
|
431 |
|
|
|
432 |
|
|
static int |
433 |
greg |
3.2 |
setspectrum( /* convert a spectrum */ |
434 |
|
|
C_COLOR *clr, |
435 |
greg |
3.1 |
int ac, |
436 |
|
|
char **av |
437 |
|
|
) |
438 |
|
|
{ |
439 |
greg |
3.2 |
double wlmin, wlmax; |
440 |
|
|
int i; |
441 |
|
|
float *va; |
442 |
|
|
/* get bounds */ |
443 |
|
|
if (ac < 4) |
444 |
|
|
return(MG_EARGC); |
445 |
|
|
if (!isflt(av[0]) || !isflt(av[1])) |
446 |
|
|
return(MG_ETYPE); |
447 |
|
|
wlmin = atof(av[0]); |
448 |
|
|
wlmax = atof(av[1]); |
449 |
|
|
ac -= 2; av += 2; |
450 |
|
|
va = (float *)malloc(sizeof(float)*ac); |
451 |
|
|
if (va == NULL) |
452 |
|
|
return(MG_EMEM); |
453 |
|
|
for (i = ac; i--; ) { |
454 |
|
|
if (!isflt(av[i])) |
455 |
|
|
return(MG_ETYPE); |
456 |
|
|
va[i] = atof(av[i]); |
457 |
|
|
} |
458 |
|
|
if (c_sset(clr, wlmin, wlmax, va, ac) <= FTINY) { |
459 |
|
|
free(va); |
460 |
greg |
3.1 |
return(MG_EILL); |
461 |
|
|
} |
462 |
greg |
3.2 |
free(va); |
463 |
greg |
3.1 |
clr->clock++; |
464 |
|
|
return(MG_OK); |
465 |
|
|
} |