void VtkCompositeColorByHeightFilter::init()
{
this->_inputDataObjectType = VTK_DATA_SET;
this->_outputDataObjectType = VTK_POLY_DATA;
vtkSmartPointer<vtkDataSetSurfaceFilter> surfaceFilter;
VtkColorByHeightFilter* heightFilter = VtkColorByHeightFilter::New();
if (dynamic_cast<vtkUnstructuredGrid*>(_inputAlgorithm->GetOutputDataObject(0)))
{
surfaceFilter = vtkSmartPointer<vtkDataSetSurfaceFilter>::New();
surfaceFilter->SetInputConnection(_inputAlgorithm->GetOutputPort());
heightFilter->SetInputConnection(surfaceFilter->GetOutputPort());
}
else
heightFilter->SetInputConnection(_inputAlgorithm->GetOutputPort());
DataHolderLib::Color a = { 0, 0, 255, 255 }; // blue
DataHolderLib::Color b = { 0, 255, 0, 255 }; // green
DataHolderLib::Color c = { 255, 255, 0, 255 }; // yellow
DataHolderLib::Color d = { 155, 100, 50, 255 }; // brown
DataHolderLib::Color e = { 255, 0, 0, 255 }; // red
VtkColorLookupTable* ColorLookupTable = heightFilter->GetColorLookupTable();
ColorLookupTable->setInterpolationType(DataHolderLib::LUTType::LINEAR);
ColorLookupTable->setColor(-50, a);
ColorLookupTable->setColor(0, a);
ColorLookupTable->setColor(1, b); // instant change at 0m a.s.l.
ColorLookupTable->setColor(200, b); // green at about 200m a.s.l.
ColorLookupTable->setColor(500, c); // yellow at about 500m and changing to red from then on
ColorLookupTable->setColor(1000, d);
ColorLookupTable->setColor(2000, e);
ColorLookupTable->SetTableRange(-35, 2000);
ColorLookupTable->Build();
// This passes ownership of the ColorLookupTable to VtkVisPointSetItem
heightFilter->SetLookUpTable("P-Colors", ColorLookupTable);
heightFilter->Update();
_outputAlgorithm = heightFilter;
_activeAttributeName = heightFilter->GetActiveAttribute();
}
VtkColorLookupTable* VtkCompositeElementSelectionFilter::GetLookupTable()
{
VtkColorLookupTable* lut = VtkColorLookupTable::New();
lut->SetTableRange(0,1);
unsigned char a[4] = { 0, 0, 255, 255 }; // blue
unsigned char b[4] = { 0, 255, 0, 255 }; // green
unsigned char c[4] = { 255, 255, 0, 255 }; // yellow
unsigned char d[4] = { 255, 0, 0, 255 }; // red
lut->setColor(1.0, a);
lut->setColor(0.5, b);
lut->setColor(0.25, c);
lut->setColor(0.1, d);
lut->Build();
return lut;
}
VtkColorLookupTable* VtkCompositeElementSelectionFilter::GetLookupTable()
{
VtkColorLookupTable* lut = VtkColorLookupTable::New();
lut->SetTableRange(0,1);
DataHolderLib::Color a{{0, 0, 255, 255}}; // blue
DataHolderLib::Color b{{0, 255, 0, 255}}; // green
DataHolderLib::Color c{{255, 255, 0, 255}}; // yellow
DataHolderLib::Color d{{255, 0, 0, 255}}; // red
lut->setColor(1.0, a);
lut->setColor(0.5, b);
lut->setColor(0.25, c);
lut->setColor(0.1, d);
lut->Build();
return lut;
}