nova/templates/dataset/wave.html

@@ -74,10 +74,12 @@
             };
 
             rcl2 = new VRC.VolumeRaycaster(config);
-            gt = ops["gray-thresholds"];
-            if (gt != null) {
-                rcl2.setGrayMinValue(gt[0]/255);
-                rcl2.setGrayMaxValue(gt[1]/255);
+            if (ops != null) {
+                gt = ops["gray-thresholds"];
+                if (gt != null) {
+                    rcl2.setGrayMinValue(gt[0]/255);
+                    rcl2.setGrayMaxValue(gt[1]/255);
+                }
             }
         }
         function sendContinuousGetToLocationUntilDone(loc) {