--- ray/src/px/pinterp.c	1990/03/06 15:45:31	1.27
+++ ray/src/px/pinterp.c	1990/09/04 21:16:25	1.29
@@ -454,7 +454,11 @@ double	z;
 		y1 = p0->y + c1*s1y/l1;
 		for (c2 = l2; c2-- > 0; ) {
 			x = x1 + c2*s2x/l2;
+			if (x < 0 || x >= hresolu)
+				continue;
 			y = y1 + c2*s2y/l2;
+			if (y < 0 || y >= vresolu)
+				continue;
 			if (zscan(y)[x] <= 0 || zscan(y)[x]-z
 						> zeps*zscan(y)[x]) {
 				zscan(y)[x] = z;
@@ -604,10 +608,10 @@ char	*fname;
 		if (donorm) {
 			double	vx, yzn2;
 			register int	x;
-			yzn2 = y - .5*(vresolu-1);
+			yzn2 = (y+.5)/vresolu + ourview.voff - .5;
 			yzn2 = 1. + yzn2*yzn2*ourview.vn2;
 			for (x = 0; x < hresolu; x++) {
-				vx = x - .5*(hresolu-1);
+				vx = (x+.5)/hresolu + ourview.hoff - .5;
 				zout[x] = zscan(y)[x]
 					* sqrt(vx*vx*ourview.hn2 + yzn2);
 			}