--- ray/src/rt/raytrace.c	2003/06/26 00:58:10	2.40
+++ ray/src/rt/raytrace.c	2003/12/31 01:50:02	2.44
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char RCSid[] = "$Id: raytrace.c,v 2.40 2003/06/26 00:58:10 schorsch Exp $";
+static const char RCSid[] = "$Id: raytrace.c,v 2.44 2003/12/31 01:50:02 greg Exp $";
 #endif
 /*
  *  raytrace.c - routines for tracing and shading rays.
@@ -31,10 +31,6 @@ OBJREC  Aftplane;			/* aft clipping plane object */
 static int  raymove(), checkhit();
 static void  checkset();
 
-#ifndef  MAXLOOP
-#define  MAXLOOP	0		/* modifier loop detection */
-#endif
-
 #define  RAYHIT		(-1)		/* return value for intercepted ray */
 
 
@@ -158,12 +154,6 @@ int  mod;
 {
 	int  gotmat;
 	register OBJREC  *m;
-#if  MAXLOOP
-	static int  depth = 0;
-					/* check for infinite loop */
-	if (depth++ >= MAXLOOP)
-		objerror(r->ro, USER, "possible modifier loop");
-#endif
 	r->rt = r->rot;			/* set effective ray length */
 	for (gotmat = 0; !gotmat && mod != OVOID; mod = m->omod) {
 		m = objptr(mod);
@@ -175,11 +165,9 @@ int  mod;
 		******/
 					/* hack for irradiance calculation */
 		if (do_irrad && !(r->crtype & ~(PRIMARY|TRANS)) &&
+				m->otype != MAT_CLIP &&
 				(ofun[m->otype].flags & (T_M|T_X))) {
 			if (irr_ignore(m->otype)) {
-#if  MAXLOOP
-				depth--;
-#endif
 				raytrans(r);
 				return(1);
 			}
@@ -189,9 +177,6 @@ int  mod;
 					/* materials call raytexture */
 		gotmat = (*ofun[m->otype].funp)(m, r);
 	}
-#if  MAXLOOP
-	depth--;
-#endif
 	return(gotmat);
 }
 
@@ -234,12 +219,6 @@ RAY  *r;
 OBJECT  mod;
 {
 	register OBJREC  *m;
-#if  MAXLOOP
-	static int  depth = 0;
-					/* check for infinite loop */
-	if (depth++ >= MAXLOOP)
-		objerror(r->ro, USER, "modifier loop");
-#endif
 					/* execute textures and patterns */
 	for ( ; mod != OVOID; mod = m->omod) {
 		m = objptr(mod);
@@ -255,9 +234,6 @@ OBJECT  mod;
 			objerror(r->ro, USER, errmsg);
 		}
 	}
-#if  MAXLOOP
-	depth--;			/* end here */
-#endif
 }
 
 
@@ -278,19 +254,20 @@ double  coef;
 					/* compute foreground and background */
 	foremat = backmat = 0;
 					/* foreground */
-	copystruct(&fr, r);
+	fr = *r;
 	if (coef > FTINY)
 		foremat = rayshade(&fr, fore);
 					/* background */
-	copystruct(&br, r);
+	br = *r;
 	if (coef < 1.0-FTINY)
 		backmat = rayshade(&br, back);
 					/* check for transparency */
-	if (backmat ^ foremat)
+	if (backmat ^ foremat) {
 		if (backmat && coef > FTINY)
 			raytrans(&fr);
 		else if (foremat && coef < 1.0-FTINY)
 			raytrans(&br);
+	}
 					/* mix perturbations */
 	for (i = 0; i < 3; i++)
 		r->pert[i] = coef*fr.pert[i] + (1.0-coef)*br.pert[i];
@@ -487,7 +464,7 @@ register CUBE  *scene;
 	}
 	cxset[0] = 0;
 	raymove(curpos, cxset, sflags, r, scene);
-	return(r->ro != NULL & r->ro != &Aftplane);
+	return((r->ro != NULL) & (r->ro != &Aftplane));
 }