--- trunk/test/vr.diderot	2010/02/11 01:04:40	36
+++ trunk/test/vr.diderot	2010/02/11 03:51:54	38
@@ -3,7 +3,20 @@
 // volume rendering example in Diderot
 //
 
-input string dataFile;
+input string dataFile;		// name of dataset
+input real stepSz;		// size of steps
 
 image<3> img = load (dataFile);
 
+actor RayCast (int row, int col)
+{
+    vec<3>	dir = (real(row), real(col));
+    vec<3>	pos = (0.0, 0.0);
+    vec<3>	t = 0.0;
+
+    update
+    {
+	pos = pos + t*dir;
+    }
+
+}

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<div id="ffErrorsBlock">
	<div class="error">does not end with &lt;/html&gt; tag</div>
	<div class="error">does not end with &lt;/body&gt; tag</div>
	<div class="info">The output has ended thus:  vec&lt;3&gt;	pos = (0.0, 0.0);
+    vec&lt;3&gt;	t = 0.0;
+
+    update
+    {
+	pos = pos + t*dir;
+    }
+
+}</div>
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