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Hi Ugo, Excellent work on your DEMViewer. One appraoch to multiple layers would be to make each layer a different data object, each with a Linear2DSet domain set. Each data object (i.e., each layer) would be connected to the DisplayImplJ3D by its own addReference call which would include a ConstantMap[] array to set each layer at a different ZAxis value, and possibly an Alpha value for transparency. You could disable a layer by calling setData(null) on its DataReference, and enable it by calling setData(layer_data) where layer_data is just the data object for the layer. Good luck, and let us know if you have any problems or questions. Cheers, Bill ---------------------------------------------------------- Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706 whibbard@xxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738 http://www.ssec.wisc.edu/~billh/vis.html
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