[Paraview] paraviewweb+webgl with volume not working

[Sebastien Jourdain]

Hi Cagatay,

the webgl renderer of paraview does not support volume rendering. If
you want to do volume rendering, you will have to use any other image
based renderer available in ParaViewWeb. (JavaScript, Java, Flash)

Seb

On Fri, Jun 1, 2012 at 1:08 PM, Cagatay Bilgin <bilgincc at gmail.com> wrote:
> I need an application that shows the 3D
> input using volume rendering on one side
> and the segmented image on the other side.
> I got the later part working, given a segmented
> image paraview and webgl renders the surface
> without a problem. I am having problems with
> the first part though, doing the volume rendering
> on the input image.
>
> When I try volume rendering on the input image,
> I see the orientation axes at the webgl
> section. I can rotate the scene but the object
> does not appear on the scene. JS and Java on
> the other hand does the rendering as expected.
> When I changethe representation to surface, webgl
> starts working as well without problem.
>
> The following code illustrates the problem.
>
>       var serverUrl =
>
> "<%=request.getScheme()%>://<%=request.getServerName()%>:<%=request.getServerPort()%>/PWService";
>
>       // ---------------- Session 1 -------------------
>
>       // Create a paraview proxy
>       var pv = new Paraview(serverUrl);
>       pv.createSession("3D Cell Vis", "Colored rendering", "default");
>       var view = pv.CreateIfNeededRenderView();
>
>
>      var reader = pv.OpenDataFile({filename:"data.mhd"});
>       var lut  = pv.GetLookupTableForArray({
>       arrayname:'MetaImage',
>       num_components : 1,
>       NanColor:[0.25, 0.0, 0.0],
>       RGBPoints:[97.9033203125, 0.23, 0.299, 0.754, 28376.271484375, 0.706,
> 0.016, 0.15],
>       VectorMode:'Magnitude',
>       ColorSpace:'Diverging',
>       ScalarRangeInitialized:1.0
>       });
>
>       var sof = pv.CreatePiecewiseFunction( {Points:[97.9033203125, 0.0,
> 0.5, 0.0, 28376.271484375, 1.0, 0.5, 0.0] });
>
>       pv.Show();
>       pv.SetDisplayProperties({proxy:reader,
>       view:view,
>       EdgeColor : [0.0, 0.0, 0.5],
>       SelectionPointFieldDataArrayName:'MetaImage',
>       ColorArrayName:'MetaImage',
>       ScalarOpacityUnitDistance:0.7,
>       LookupTable:lut,
>       Representation:'Volume',
>       ScaleFactor:10,
>       ScalarOpacityFunction:sof});
>
>
>       var render = pv.Render();
>       pv.ResetCamera();
>       view.setCenterOfRotation(view.getCameraFocalPoint());
>
>       // Create and bind renderer
>       // ---- For Java ----
>       var rendererJava = new HttpAppletRenderer("javaRenderer", serverUrl);
>       rendererJava.init(pv.sessionId, view.__selfid__);
>       rendererJava.setSize('500','500');
>       rendererJava.bindToElementId("java-http-container");
>       rendererJava.start();
>
>       // ---- For JavaScript ----
>       var rendererJs = new JavaScriptRenderer("jsRenderer", serverUrl);
>       rendererJs.init(pv.sessionId, view.__selfid__);
>       rendererJs.setSize('500','500');
>       rendererJs.bindToElementId("javascript-container");
>       rendererJs.start();
>
>       // ---- For WebGL ----
>       var rendererWebGL = new WebGLRenderer("webglRenderer", serverUrl);
>       pv.updateConfiguration(true, "JPEG", "WebGL");
>       rendererWebGL.init(pv.sessionId, view.__selfid__);
>       rendererWebGL.setSize(500,500);
>       rendererWebGL.bindToElementId("webgl-container");
>       rendererWebGL.start();
>
> Any ideas what might be going wrong ?
>
> Thank you,
> Cagatay
>
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