[Paraview] Problem loading multiple volumes in ParaviewWeb

[Utkarsh Ayachit]

Can you post an image of what you're seeing? Also if you post images
for what you see rendered at the following locations in the code, it
will be helpful.



            ...
            // Load the data files in RAM
            var data1 = pv.OpenDataFile('test1.vtk');

           CAPTURE_IMAGE()

            var Representation1 = pv.Hide({proxy: data1});

            var data2 = pv.OpenDataFile('test2.vtk');
           CAPTURE_IMAGE()

            var Representation2 = pv.Hide({proxy : data2});
           CAPTURE_IMAGE()

            // Init view parameters
            ....

            // Show one dataset only
            pv.Show({proxy : data2});

           CAPTURE_IMAGE()

On Wed, Apr 27, 2011 at 6:32 PM, Rajvikram Singh <rajvikrams at yahoo.com> wrote:
>
> Hi everyone .. Greetings !
>    I'm trying to create a web visualization page where biologists in our lab can see their multi-channel volume data. Each channel is a separate file and since there could be as many as 11-12 channels I want to give them the ability to switch the volumes on/off or even see two volumes in the same space.
>
> To test this I wrote the following Javascript code to load two volume files (.vtk) and then show only one. The problem is though I get no errors, I can only see the last file that's loaded (I've tried different combination of files). When I try to show the first file, all I see is a gray box instead of the data.
>
>  It almost feels like the OpenDataFile() function is using the same object and overwrites it. I'm new to Javascript and would not be surprised if I'm doing something silly but any advice is sincerely appreciated.
>
> Javascript Code :
>
>             // Set the web service base URL
>             var serverUrl = "<%=request.getScheme()%>://<%=request.getServerName()%>:<%=request.getServerPort()%>/PWService";
>             //
>             // Create a paraview proxy
>             //
>             var pv = new Paraview(serverUrl);
>             pv.createSession("Test Visualization", "Ver 0.1", "default");
>             var view1 = pv.CreateIfNeededRenderView();
>             pv.Render();
>
>             // Load the data files in RAM
>             var data1 = pv.OpenDataFile('test1.vtk');
>             var Representation1 = pv.Hide({proxy: data1});
>
>             var data2 = pv.OpenDataFile('test2.vtk');
>             var Representation2 = pv.Hide({proxy : data2});
>
>
>             // Init view parameters
>             var lut1 = pv.GetLookupTableForArray({arrayname : "ImageFile", num_components : 1, HSVWrap : 0, NanColor : [0.0, 0.66666666666666663, 0.0], RGBPoints : [1.0, 0.0, 0.0, 0.0, 16564.27904630101, 1.0, 0.035950255588616767, 0.0, 19924.923666800998, 1.0, 0.035950255588616767, 0.0, 39728.909301543368, 0.0, 0.66666666666666663, 0.0, 65294.000000000007, 0.0, 0.0, 0.0], ColorSpace : 'HSV'});
>
>             var f = pv.CreatePiecewiseFunction( {Points:[0.0, 0.0, 2762.37, 0.0588235, 2882.47, 0, 6965.97, 0.235294, 15373.2, 0.323529, 25221.6, 0, 26662.9, 0, 36751.5, 0, 44318, 0.0, 52124.7, 0.323529, 63054, 0.294118, 65336, 0.294118] });
>
>
>             pv.SetDisplayProperties( {
>             view  : view1,
>             SelectMapper : 'GPU',
>             Representation : 'Volume',
>             LookupTable : lut1,
>             ColorArrayName : 'ImageFile',
>             ScalarOpacityFunction : f,
>             } );
>
>             // Show one dataset only
>             pv.Show({proxy : data2});
>
>
> Thanks in advance
> Raj
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