David-<div><br></div><div>Can you make it consistent with vtkMapper? vtkMapper has a color mode to determine how to treat unsigned char as follows:</div><div><br></div><div><div> // Description:</div><div> // Control how the scalar data is mapped to colors. By default</div>
<div> // (ColorModeToDefault), unsigned char scalars are treated as colors, and</div><div> // NOT mapped through the lookup table, while everything else is. Setting</div><div> // ColorModeToMapScalars means that all scalar data will be mapped through</div>
<div> // the lookup table. (Note that for multi-component scalars, the</div><div> // particular component to use for mapping can be specified using the</div><div> // SelectColorArray() method.)</div><div> vtkSetMacro(ColorMode,int);</div>
<div> vtkGetMacro(ColorMode,int);</div><div> void SetColorModeToDefault() </div><div> {this->SetColorMode(VTK_COLOR_MODE_DEFAULT);};</div><div> void SetColorModeToMapScalars() </div><div> {this->SetColorMode(VTK_COLOR_MODE_MAP_SCALARS);};</div>
<div><br></div><br><div class="gmail_quote">On Tue, Aug 31, 2010 at 7:55 AM, David Doria <span dir="ltr"><<a href="mailto:daviddoria%2Bvtk@gmail.com">daviddoria+vtk@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Currently when you use a vtkGraphLayoutView you must use a look up table to color the points. I modified vtkApplyColors and vtkRenderedGraphRepresentation to allow a user to color graph vertices directly with a vtkUnsignedCharArray. Here is an example usage:<div>
<br></div><div><div> vtkSmartPointer<vtkUnsignedCharArray> vertexColors =</div><div> vtkSmartPointer<vtkUnsignedCharArray>::New();</div>
<div> vertexColors->SetNumberOfComponents(3);</div><div> vertexColors->SetName("PassVertexColors");</div><div><br></div><div>// ... add colors ... ///</div><div><br></div><div> vtkSmartPointer<vtkRenderedGraphRepresentation> representation =</div>
<div> vtkSmartPointer<vtkRenderedGraphRepresentation>::New();</div><div> std::cout << representation->GetClassName() << std::endl;</div><div> representation->SetInputConnection(tree->GetProducerPort());</div>
<div> representation->ColorVerticesByArrayOn();</div><div><b> representation->SetPassThroughPointColors(vertexColors);</b></div><div><br></div><div> vtkSmartPointer<vtkGraphLayoutView> graphLayoutView =</div>
<div>
vtkSmartPointer<vtkGraphLayoutView>::New();</div><div> graphLayoutView->AddRepresentation(representation);</div></div><div><br></div><div>The branch is here:</div><div><br></div><div>repo: git@github.com:daviddoria/daviddoria-vtk.git</div>
<div>branch: VTK-GraphColors</div><div><br clear="all">Please let me know what you think.<br><br>David<br>
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