--- trunk/rtest/tests/sum-ghp/sum-ghp.diderot	2011/06/23 20:03:05	1382
+++ trunk/rtest/tests/sum-ghp/sum-ghp.diderot	2011/06/23 20:24:04	1383
@@ -35,7 +35,7 @@
     update {
         vec3 rayPos = camEye + rayN*rayVec;
         if (inside (rayPos,F)) {
-          vec3 prod = ∇(∇F)(rayPos) • ∇F(rayPos);
+          vec3 prod = ∇⊗∇F(rayPos) • ∇F(rayPos);
           sum = sum + [prod•camU, prod•camV, prod•camN];
 	}
         if (rayN > camVspFar)

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           sum = sum + [prod&bull;camU, prod&bull;camV, prod&bull;camN];
 	}
         if (rayN &gt; camVspFar)</div>
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