[Paraview] ParaviewWeb : Adding interactive slice filter to pipeline

[Sebastien Jourdain]

Hi Raj,

You are not getting the propers bounds when you directly access them like
that:

> reader.Bounds

In fact, if you validate each line that you wrote inside the JavaScript
console of your browser, you could have seen that Bounds was not part of the
reader proxy. Moreover, it goes against the idea that Proxy do not have
methods/fields but only properties that can be set/get based on their name.
So eventually, it could have been reader.getBounds(). Although, bounds is
not a property of the reader.
In order to get the right informations, you do need to do call a method on
ParaView:

> var dataInfo = pv.GetDataInformation({proxy:reader});

The returned value is not a proxy, it's just a data structure with all the
data informations of the given proxy. (Fields name, Time, scalar range,
bounds, memory consumption on the server...)

Then you can do :
> sr.setPlaceWidget(dataInfo.Bounds);

I do believe that you  look at the file ParaWebFunctions.js inside the PWApp
to get that close. If not, it could provide you some help on how to handle
some common actions.

Thanks,

Seb

On Fri, Apr 29, 2011 at 7:25 PM, Rajvikram Singh <rajvikrams at yahoo.com>wrote:

> Hi
>    I am trying to add a simple slice filter to a ParaviewWeb client that
> users could use interact with a volume. The bundled PWApp application does
> this already and so I tried to go through the code and looked at some Python
> examples. I was able to get an interactive widget to render but it shows a
> blank slice. Also the bounds are not correct since the volume is 'flat' and
> what I see is a cube.
>
> Here's the code I'm using :
>
> var reader = pv.OpenDataFile({filename : "test.vtk"});
>     var view1 = pv.CreateIfNeededRenderView();
>     pv.Render();
>
>     var sliceFilter = pv.Slice({Input : reader});
>     sliceFilter.SetSliceNormal = [0,0,1]; // sliec along Z
>     sliceFilter.SetSliceOrigin = [0,0,0];
>     sliceFilter.SetSliceType = 'Plane';
> //    sliceFilter.SetInputBounds = pv.GetDataInformation.Bounds;
>
>     var sr = pv.CreateBindedWidget({proxy : sliceFilter.getSliceType(),
> view : view1});
>     sr.setPlaceWidget(reader.Bounds);
>     sr.setEnabled(1);
>     sr.setVisibility(1);
>
>     var dataRep1 = pv.Show({proxy : sliceFilter});
>
>
>     pv.SetDisplayProperties( {
>     proxy : sliceFilter,
>     view  : view1,
>     Representation : 'Surface',
>     } );
>
> I'm attaching a screenshot of what's rendered in my browser. I'm obviously
> not setting some property correctly .. I just can't tell which one.
>
> Thanks in advance
> Raj
>
>
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