Hello!
I am trying to map colors based on scalars of a polydata using vtk.js - but I can’t get it to work.
polydata = reader.getOutputData();
arrayName = polydata.getPointData().getArrayName(0);
activeArray = polydata.getPointData().getArrays()[0];
dataRange = activeArray.getRange()
lookupTable = vtk.Rendering.Core.vtkColorTransferFunction.newInstance();
lookupTable.setVectorModeToMagnitude();
lookupTable.applyColorMap(preset);
lookupTable.setMappingRange(dataRange[0],dataRange[1]);
lookupTable.updateRange();
mapper = vtk.Rendering.Core.vtkMapper.newInstance({});
mapper.setInputData(polydata);
mapper.setLookupTable(lookupTable);
mapper.setColorByArrayName(arrayName);
mapper.setColorModeToMapScalars();
mapper.setInterpolateScalarsBeforeMapping();
mapper.setScalarModeToUsePointData();
mapper.setScalarVisibility(true);
mapper.setScalarRange(dataRange[0],dataRange[1]);
actor.setMapper(mapper);
renderer.addActor(actor);
renderer.resetCamera();
renderWindow.render();
The polydata loads but no colors are assigned. What do I need to add?
Thank you so much!
