--- ray/src/cv/mgflib/context.c	1994/06/25 19:31:14	1.10
+++ ray/src/cv/mgflib/context.c	1994/07/22 12:50:24	1.15
@@ -26,8 +26,11 @@ static C_VERTEX		c_unvertex = C_DEFVERTEX;
 
 				/* the current contexts */
 C_COLOR		*c_ccolor = &c_uncolor;
+char		*c_ccname = NULL;
 C_MATERIAL	*c_cmaterial = &c_unmaterial;
+char		*c_cmname = NULL;
 C_VERTEX	*c_cvertex = &c_unvertex;
+char		*c_cvname = NULL;
 
 static LUTAB	clr_tab = LU_SINIT(free,free);	/* color lookup table */
 static LUTAB	mat_tab = LU_SINIT(free,free);	/* material lookup table */
@@ -49,7 +52,6 @@ register char	**av;
 {
 	double	w, wsum;
 	register int	i;
-	char	*nm;
 	register LUENT	*lp;
 
 	switch (mg_entity(av[0])) {
@@ -59,11 +61,13 @@ register char	**av;
 		if (ac == 1) {		/* set unnamed color context */
 			c_uncolor = c_dfcolor;
 			c_ccolor = &c_uncolor;
+			c_ccname = NULL;
 			return(MG_OK);
 		}
 		lp = lu_find(&clr_tab, av[1]);	/* lookup context */
 		if (lp == NULL)
 			return(MG_EMEM);
+		c_ccname = lp->key;
 		c_ccolor = (C_COLOR *)lp->data;
 		if (ac == 2) {		/* reestablish previous context */
 			if (c_ccolor == NULL)
@@ -80,14 +84,13 @@ register char	**av;
 			lp->data = (char *)malloc(sizeof(C_COLOR));
 			if (lp->data == NULL)
 				return(MG_EMEM);
+			c_ccname = lp->key;
 			c_ccolor = (C_COLOR *)lp->data;
 			c_ccolor->clock = 0;
 		}
-		nm = lp->key;
 		i = c_ccolor->clock;
 		if (ac == 3) {		/* use default template */
 			*c_ccolor = c_dfcolor;
-			c_ccolor->name = nm;
 			c_ccolor->clock = i + 1;
 			return(MG_OK);
 		}
@@ -97,7 +100,6 @@ register char	**av;
 		if (lp->data == NULL)
 			return(MG_EUNDEF);
 		*c_ccolor = *(C_COLOR *)lp->data;
-		c_ccolor->name = nm;
 		c_ccolor->clock = i + 1;
 		return(MG_OK);
 	case MG_E_CXY:		/* assign CIE XY value */
@@ -160,7 +162,6 @@ int	ac;
 register char	**av;
 {
 	int	i;
-	char	*nm;
 	register LUENT	*lp;
 
 	switch (mg_entity(av[0])) {
@@ -170,11 +171,13 @@ register char	**av;
 		if (ac == 1) {		/* set unnamed material context */
 			c_unmaterial = c_dfmaterial;
 			c_cmaterial = &c_unmaterial;
+			c_cmname = NULL;
 			return(MG_OK);
 		}
 		lp = lu_find(&mat_tab, av[1]);	/* lookup context */
 		if (lp == NULL)
 			return(MG_EMEM);
+		c_cmname = lp->key;
 		c_cmaterial = (C_MATERIAL *)lp->data;
 		if (ac == 2) {		/* reestablish previous context */
 			if (c_cmaterial == NULL)
@@ -191,14 +194,13 @@ register char	**av;
 			lp->data = (char *)malloc(sizeof(C_MATERIAL));
 			if (lp->data == NULL)
 				return(MG_EMEM);
+			c_cmname = lp->key;
 			c_cmaterial = (C_MATERIAL *)lp->data;
 			c_cmaterial->clock = 0;
 		}
-		nm = lp->key;
 		i = c_cmaterial->clock;
 		if (ac == 3) {		/* use default template */
 			*c_cmaterial = c_dfmaterial;
-			c_cmaterial->name = nm;
 			c_cmaterial->clock = i + 1;
 			return(MG_OK);
 		}
@@ -208,7 +210,6 @@ register char	**av;
 		if (lp->data == NULL)
 			return(MG_EUNDEF);
 		*c_cmaterial = *(C_MATERIAL *)lp->data;
-		c_cmaterial->name = nm;
 		c_cmaterial->clock = i + 1;
 		return(MG_OK);
 	case MG_E_RD:		/* set diffuse reflectance */
@@ -270,6 +271,20 @@ register char	**av;
 		c_cmaterial->ts_c = *c_ccolor;
 		c_cmaterial->clock++;
 		return(MG_OK);
+	case MG_E_SIDES:	/* set number of sides */
+		if (ac != 2)
+			return(MG_EARGC);
+		if (!isint(av[1]))
+			return(MG_ETYPE);
+		i = atoi(av[1]);
+		if (i == 1)
+			c_cmaterial->sided = 1;
+		else if (i == 2)
+			c_cmaterial->sided = 0;
+		else
+			return(MG_EILL);
+		c_cmaterial->clock++;
+		return(MG_OK);
 	}
 	return(MG_EUNK);
 }
@@ -281,7 +296,6 @@ int	ac;
 register char	**av;
 {
 	int	i;
-	char	*nm;
 	register LUENT	*lp;
 
 	switch (mg_entity(av[0])) {
@@ -291,11 +305,13 @@ register char	**av;
 		if (ac == 1) {		/* set unnamed vertex context */
 			c_unvertex = c_dfvertex;
 			c_cvertex = &c_unvertex;
+			c_cvname = NULL;
 			return(MG_OK);
 		}
 		lp = lu_find(&vtx_tab, av[1]);	/* lookup context */
 		if (lp == NULL)
 			return(MG_EMEM);
+		c_cvname = lp->key;
 		c_cvertex = (C_VERTEX *)lp->data;
 		if (ac == 2) {		/* reestablish previous context */
 			if (c_cvertex == NULL)
@@ -312,13 +328,12 @@ register char	**av;
 			lp->data = (char *)malloc(sizeof(C_VERTEX));
 			if (lp->data == NULL)
 				return(MG_EMEM);
+			c_cvname = lp->key;
 			c_cvertex = (C_VERTEX *)lp->data;
 		}
-		nm = lp->key;
 		i = c_cvertex->clock;
 		if (ac == 3) {		/* use default template */
 			*c_cvertex = c_dfvertex;
-			c_cvertex->name = nm;
 			c_cvertex->clock = i + 1;
 			return(MG_OK);
 		}
@@ -328,7 +343,6 @@ register char	**av;
 		if (lp->data == NULL)
 			return(MG_EUNDEF);
 		*c_cvertex = *(C_VERTEX *)lp->data;
-		c_cvertex->name = nm;
 		c_cvertex->clock = i + 1;
 		return(MG_OK);
 	case MG_E_POINT:	/* set point */
@@ -362,13 +376,28 @@ c_clearall()			/* empty context tables */
 {
 	c_uncolor = c_dfcolor;
 	c_ccolor = &c_uncolor;
+	c_ccname = NULL;
 	lu_done(&clr_tab);
 	c_unmaterial = c_dfmaterial;
 	c_cmaterial = &c_unmaterial;
+	c_cmname = NULL;
 	lu_done(&mat_tab);
 	c_unvertex = c_dfvertex;
 	c_cvertex = &c_unvertex;
+	c_cvname = NULL;
 	lu_done(&vtx_tab);
+}
+
+
+C_MATERIAL *
+c_getmaterial(name)		/* get a named material */
+char	*name;
+{
+	register LUENT	*lp;
+
+	if ((lp = lu_find(&mat_tab, name)) == NULL)
+		return(NULL);
+	return((C_MATERIAL *)lp->data);
 }