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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 */ |
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greg |
3.2 |
return(setspectrum(c_ccolor, ac-1, av+1)); |
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greg |
3.1 |
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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if (!c_bbtemp(c_ccolor, atof(av[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_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); |
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wsum = atof(av[1]); |
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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 ((lp = lu_find(&clr_tab, av[i+1])) == NULL) |
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return(MG_EMEM); |
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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, |
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w, (C_COLOR *)lp->data); |
| 141 |
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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++; |
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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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int |
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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; |
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greg |
3.2 |
LUENT *lp; |
| 157 |
greg |
3.1 |
|
| 158 |
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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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if (!isname(av[1])) |
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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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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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} |
| 180 |
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if (av[2][0] != '=' || av[2][1]) |
| 181 |
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return(MG_ETYPE); |
| 182 |
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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); |
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strcpy(lp->key, av[1]); |
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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); |
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c_cmname = lp->key; |
| 191 |
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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); |
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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); |
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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])) |
| 213 |
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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 |
|
|
if (lp == NULL) |
| 349 |
|
|
return(MG_EMEM); |
| 350 |
|
|
if (lp->data == NULL) |
| 351 |
|
|
return(MG_EUNDEF); |
| 352 |
|
|
*c_cvertex = *(C_VERTEX *)lp->data; |
| 353 |
|
|
c_cvertex->clock = i + 1; |
| 354 |
|
|
return(MG_OK); |
| 355 |
|
|
case MG_E_POINT: /* set point */ |
| 356 |
|
|
if (ac != 4) |
| 357 |
|
|
return(MG_EARGC); |
| 358 |
|
|
if (!isflt(av[1]) | !isflt(av[2]) | !isflt(av[3])) |
| 359 |
|
|
return(MG_ETYPE); |
| 360 |
|
|
c_cvertex->p[0] = atof(av[1]); |
| 361 |
|
|
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 |
|
|
} |
