--- ray/src/common/depthcodec.c	2020/01/10 01:02:14	2.6
+++ ray/src/common/depthcodec.c	2020/01/25 05:35:34	2.8
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char RCSid[] = "$Id: depthcodec.c,v 2.6 2020/01/10 01:02:14 greg Exp $";
+static const char RCSid[] = "$Id: depthcodec.c,v 2.8 2020/01/25 05:35:34 greg Exp $";
 #endif
 /*
  * Routines to encode/decoded 16-bit depths
@@ -26,7 +26,7 @@ depth2code(double d, double dref)
 	if (d > dref)
 		return (int)(32768.001 - 32768.*dref/d) - 1;
 
-	return (int)(32767.*d/dref - 32768.);
+	return (int)(32767.*d/dref - 32768.999);
 }
 #endif
 
@@ -42,10 +42,10 @@ code2depth(int c, double dref)
 	if (c >= 32767)
 		return FHUGE;
 
-	if (c >= 0)
+	if (c >= -1)
 		return dref*32768./(32766.5 - c);
 
-	return dref*(32767.5 + c)*(1./32767.);
+	return dref*(32768.5 + c)*(1./32767.);
 }
 #endif