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greg |
1.1 |
/* 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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#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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greg |
1.2 |
#include <math.h>
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greg |
1.1 |
#include <string.h>
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#include "parser.h"
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#include "lookup.h"
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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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/* 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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C_MATERIAL *c_cmaterial = &c_unmaterial;
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C_VERTEX *c_cvertex = &c_unvertex;
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greg |
1.3 |
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 |
1.1 |
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int
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c_hcolor(ac, av) /* handle color entity */
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int ac;
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register char **av;
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{
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register LUENT *lp;
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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 == 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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return(MG_OK);
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}
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lp = lu_find(&clr_tab, av[1]); /* lookup context */
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if (lp == NULL)
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return(MG_EMEM);
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if (ac == 2) { /* reestablish previous context */
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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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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 (lp->key == 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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}
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c_ccolor = (C_COLOR *)lp->data;
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if (ac == 3) { /* use default template */
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*c_ccolor = c_dfcolor;
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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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if (ac > 4)
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return(MG_EARGC);
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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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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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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(ac, av) /* handle material entity */
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int ac;
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register char **av;
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{
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register LUENT *lp;
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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 == 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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return(MG_OK);
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}
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lp = lu_find(&mat_tab, av[1]); /* lookup context */
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if (lp == NULL)
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return(MG_EMEM);
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if (ac == 2) { /* reestablish previous context */
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if (lp->data == NULL)
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return(MG_EUNDEF);
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c_cmaterial = (C_MATERIAL *)lp->data;
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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 (lp->key == NULL) { /* create new material 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_MATERIAL));
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if (lp->data == NULL)
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return(MG_EMEM);
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}
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c_cmaterial = (C_MATERIAL *)lp->data;
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if (ac == 3) { /* use default template */
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*c_cmaterial = c_dfmaterial;
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greg |
1.2 |
c_cmaterial->name = lp->key;
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greg |
1.1 |
return(MG_OK);
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}
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lp = lu_find(&mat_tab, av[3]); /* lookup template */
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if (lp == NULL)
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return(MG_EMEM);
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if (lp->data == NULL)
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return(MG_EUNDEF);
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*c_cmaterial = *(C_MATERIAL *)lp->data;
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greg |
1.2 |
c_cmaterial->name = lp->key;
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c_cmaterial->clock = 1;
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greg |
1.1 |
if (ac > 4)
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return(MG_EARGC);
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return(MG_OK);
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case MG_E_RD: /* set diffuse reflectance */
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if (ac != 2)
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return(MG_EARGC);
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if (!isflt(av[1]))
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return(MG_ETYPE);
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c_cmaterial->rd = atof(av[1]);
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if (c_cmaterial->rd < 0. | c_cmaterial->rd > 1.)
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return(MG_EILL);
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c_cmaterial->rd_c = *c_ccolor;
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greg |
1.2 |
c_cmaterial->clock++;
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greg |
1.1 |
return(MG_OK);
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case MG_E_ED: /* set diffuse emittance */
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if (ac != 2)
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return(MG_EARGC);
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if (!isflt(av[1]))
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return(MG_ETYPE);
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c_cmaterial->ed = atof(av[1]);
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if (c_cmaterial->ed < 0.)
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return(MG_EILL);
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c_cmaterial->ed_c = *c_ccolor;
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greg |
1.2 |
c_cmaterial->clock++;
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greg |
1.1 |
return(MG_OK);
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case MG_E_TD: /* set diffuse transmittance */
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if (ac != 2)
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return(MG_EARGC);
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if (!isflt(av[1]))
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return(MG_ETYPE);
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c_cmaterial->td = atof(av[1]);
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if (c_cmaterial->td < 0. | c_cmaterial->td > 1.)
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return(MG_EILL);
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c_cmaterial->td_c = *c_ccolor;
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return(MG_OK);
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case MG_E_RS: /* set specular reflectance */
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if (ac != 3)
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return(MG_EARGC);
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if (!isflt(av[1]) || !isflt(av[2]))
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return(MG_ETYPE);
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c_cmaterial->rs = atof(av[1]);
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c_cmaterial->rs_a = atof(av[2]);
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if (c_cmaterial->rs < 0. | c_cmaterial->rs > 1. |
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c_cmaterial->rs_a < 0.)
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return(MG_EILL);
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c_cmaterial->rs_c = *c_ccolor;
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greg |
1.2 |
c_cmaterial->clock++;
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greg |
1.1 |
return(MG_OK);
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case MG_E_TS: /* set specular transmittance */
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if (ac != 3)
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return(MG_EARGC);
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if (!isflt(av[1]) || !isflt(av[2]))
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return(MG_ETYPE);
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c_cmaterial->ts = atof(av[1]);
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c_cmaterial->ts_a = atof(av[2]);
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if (c_cmaterial->ts < 0. | c_cmaterial->ts > 1. |
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c_cmaterial->ts_a < 0.)
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return(MG_EILL);
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c_cmaterial->ts_c = *c_ccolor;
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greg |
1.2 |
c_cmaterial->clock++;
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greg |
1.1 |
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_hvertex(ac, av) /* handle a vertex entity */
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int ac;
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register char **av;
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{
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register LUENT *lp;
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switch (mg_entity(av[0])) {
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case MG_E_VERTEX: /* get/set vertex context */
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if (ac == 1) { /* set unnamed vertex context */
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c_unvertex = c_dfvertex;
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c_cvertex = &c_unvertex;
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return(MG_OK);
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}
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lp = lu_find(&vtx_tab, av[1]); /* lookup context */
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if (lp == NULL)
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return(MG_EMEM);
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if (ac == 2) { /* reestablish previous context */
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if (lp->data == NULL)
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return(MG_EUNDEF);
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c_cvertex = (C_VERTEX *)lp->data;
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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 (lp->key == NULL) { /* create new vertex context */
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lp->key = (char *)malloc(strlen(av[1])+1);
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if (lp->key == NULL)
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return(MG_EMEM);
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strcpy(lp->key, av[1]);
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lp->data = (char *)malloc(sizeof(C_VERTEX));
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if (lp->data == NULL)
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return(MG_EMEM);
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}
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c_cvertex = (C_VERTEX *)lp->data;
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if (ac == 3) { /* use default template */
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*c_cvertex = c_dfvertex;
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return(MG_OK);
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}
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lp = lu_find(&vtx_tab, av[3]); /* lookup template */
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if (lp == NULL)
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return(MG_EMEM);
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if (lp->data == NULL)
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return(MG_EUNDEF);
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*c_cvertex = *(C_VERTEX *)lp->data;
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if (ac > 4)
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return(MG_EARGC);
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| 262 |
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return(MG_OK);
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case MG_E_POINT: /* set point */
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if (ac != 4)
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return(MG_EARGC);
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| 266 |
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if (!isflt(av[1]) || !isflt(av[2]) || !isflt(av[3]))
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| 267 |
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return(MG_ETYPE);
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| 268 |
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c_cvertex->p[0] = atof(av[1]);
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| 269 |
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c_cvertex->p[1] = atof(av[2]);
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| 270 |
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c_cvertex->p[2] = atof(av[3]);
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| 271 |
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return(MG_OK);
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case MG_E_NORMAL: /* set normal */
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| 273 |
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if (ac != 4)
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| 274 |
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return(MG_EARGC);
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| 275 |
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if (!isflt(av[1]) || !isflt(av[2]) || !isflt(av[3]))
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| 276 |
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return(MG_ETYPE);
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| 277 |
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c_cvertex->n[0] = atof(av[1]);
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| 278 |
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c_cvertex->n[1] = atof(av[2]);
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| 279 |
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c_cvertex->n[2] = atof(av[3]);
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| 280 |
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(void)normalize(c_cvertex->n);
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| 281 |
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return(MG_OK);
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| 282 |
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}
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| 283 |
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return(MG_EUNK);
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| 284 |
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}
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| 285 |
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| 287 |
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void
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| 288 |
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c_clearall() /* empty context tables */
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| 289 |
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{
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| 290 |
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c_uncolor = c_dfcolor;
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| 291 |
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c_ccolor = &c_uncolor;
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| 292 |
greg |
1.3 |
lu_done(&clr_tab);
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| 293 |
greg |
1.1 |
c_unmaterial = c_dfmaterial;
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| 294 |
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c_cmaterial = &c_unmaterial;
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| 295 |
greg |
1.3 |
lu_done(&mat_tab);
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| 296 |
greg |
1.1 |
c_unvertex = c_dfvertex;
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| 297 |
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c_cvertex = &c_unvertex;
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| 298 |
greg |
1.3 |
lu_done(&vtx_tab);
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| 299 |
greg |
1.1 |
}
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| 300 |
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| 301 |
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| 302 |
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C_VERTEX *
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| 303 |
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c_getvert(name) /* get a named vertex */
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| 304 |
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char *name;
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| 305 |
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{
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| 306 |
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register LUENT *lp;
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| 307 |
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| 308 |
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if ((lp = lu_find(&vtx_tab, name)) == NULL)
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| 309 |
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return(NULL);
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| 310 |
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return((C_VERTEX *)lp->data);
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| 311 |
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}
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