Fix ungroup.

Normand Briere

2019-06-29 a69bb4474a3264a9a7a7f8b8d8154ea771f167c8

 Biparam.java
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@@ -16,7 +16,7 @@
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         CreateMaterial();
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     }
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-    void DrawNode(CameraPane display, Object3D /*Composite*/ root, boolean selected)
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+    void DrawNode(iCameraPane display, Object3D /*Composite*/ root, boolean selected)
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     {
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         //System.out.println("#vertices = " + bRep.VertexCount());
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         if(false)