[vtkusers] re: user update of rendering with Modified()

[Malcolm Drummond]

Hi Matthew

Within the command for the comboboxes you need something like ...

do2ds SetPointComponent $n $NewAxis 0
renWin Render

The modified flag is set internally when you use the SetPointComponent
method so you just need to call the Render method of vtkRenderWindow.

Malcolm

----- Original Message -----
From: Matthew Pastizzo <mp1984 at csc.albany.edu>
To: <vtkusers at public.kitware.com>
Sent: Thursday, April 26, 2001 9:52 PM
Subject: [vtkusers] re: user update of rendering with Modified()


> Hi all,
>
> Here is some code to render x-y-z data.  User has the option of
> changing the values of $xAxisVar, $yAxisVar, and $zAxisVar
> through comboboxes for each axis.
>
> Does anyone know code that will automatically update the
> SetPointComponent of x,y,z?  Someone mentioned using
> sending a Modified() command, but I'm not sure how to
> implement.
>
> Thanks, Matt
>
>
> set size 78;#maximum number possible (1 less than actual number)
> set xAxis $xAxisVar;#red axis
> set yAxis $yAxisVar;#yellow axis
> set zAxis $zAxisVar;#green axis
> set scalar1 $scalar1Var;#blue
> set scalar2 $scalar2Var;#red
> set scalar3 $scalar3Var;#yellow
>
> # extract data from field as a polydata (just points), then extract
scalars
> vtkDataObjectReader fdr
>     fdr SetFileName "$VTK_DATA/concrete.vtk"
> vtkDataObjectToDataSetFilter do2ds
>     do2ds SetInput [fdr GetOutput]
>     do2ds SetDataSetTypeToPolyData
> #format: component#, arrayname, arraycomp, minArrayId, maxArrayId,
normalize
>     do2ds DefaultNormalizeOn
>     do2ds SetPointComponent 0 $xAxis 0
>     do2ds SetPointComponent 1 $yAxis 0
>     do2ds SetPointComponent 2 $zAxis 0
>     do2ds Update
>
> vtkFieldDataToAttributeDataFilter fd2ad1
>     fd2ad1 SetInput [do2ds GetOutput]
>     fd2ad1 SetInputFieldToDataObjectField
>     fd2ad1 SetOutputAttributeDataToPointData
>     fd2ad1 DefaultNormalizeOn
>     fd2ad1 SetScalarComponent 0 $scalar1 0
>
> vtkFieldDataToAttributeDataFilter fd2ad2
>     fd2ad2 SetInput [do2ds GetOutput]
>     fd2ad2 SetInputFieldToDataObjectField
>     fd2ad2 SetOutputAttributeDataToPointData
>     fd2ad2 DefaultNormalizeOn
>     fd2ad2 SetScalarComponent 0 $scalar2 0
>
> vtkFieldDataToAttributeDataFilter fd2ad3
>     fd2ad3 SetInput [do2ds GetOutput]
>     fd2ad3 SetInputFieldToDataObjectField
>     fd2ad3 SetOutputAttributeDataToPointData
>     fd2ad3 DefaultNormalizeOn
>     fd2ad3 SetScalarComponent 0 $scalar3 0
>
> # construct pipeline for original population
> vtkGaussianSplatter popSplatter
>     popSplatter SetInput [fd2ad1 GetOutput]
>     popSplatter SetSampleDimensions 50 50 50
>     popSplatter SetRadius .05
>     popSplatter ScalarWarpingOff
> vtkContourFilter popSurface
>     popSurface SetInput [popSplatter GetOutput]
>     popSurface SetValue 0 .01
> vtkPolyDataMapper popMapper
>     popMapper SetInput [popSurface GetOutput]
>     popMapper ScalarVisibilityOff
> vtkActor popActor
>     popActor SetMapper popMapper
>     [popActor GetProperty] SetOpacity .1
>     [popActor GetProperty] SetColor .95 .95 .95
>
> vtkRenderer ren1
> $renWin1 AddRenderer ren1
>
> # Add the actors to the renderer, set the background and size
> #
> ren1 AddActor axesActor
> ren1 AddActor popActor
> ren1 AddActor scalar1Actor
> ren1 AddActor scalar2Actor
> ren1 AddActor scalar3Actor
> ren1 AddActor XActor
> ren1 AddActor YActor
> ren1 AddActor ZActor
> ren1 SetBackground 1 1 1
> ren1 SetActiveCamera camera
> XActor SetCamera camera
> YActor SetCamera camera
> ZActor SetCamera camera
>
>
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