ScalarBarActorColorSeries
Repository source: ScalarBarActorColorSeries
Description¶
The vtkColorSeries object stores palettes of colors. There are several default palettes (or schemes) available and functions to control several aspects of what colors are returned. In essence a color scheme is set and then the number of colors and individual color values may be requested.
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Code¶
ScalarBarActorColorSeries.java
import vtk.vtkActor;
import vtk.vtkNamedColors;
import vtk.vtkNativeLibrary;
import vtk.vtkPolyDataMapper;
import vtk.vtkRenderWindow;
import vtk.vtkRenderWindowInteractor;
import vtk.vtkRenderer;
import vtk.vtkSphereSource;
import vtk.vtkFloatArray;
import vtk.vtkPolyData;
import vtk.vtkScalarBarActor;
import vtk.vtkLookupTable;
import vtk.vtkColorSeries;
public class ScalarBarActorColorSeries
{
// -----------------------------------------------------------------
// Load VTK library and print which library was not properly loaded
static
{
if (!vtkNativeLibrary.LoadAllNativeLibraries())
{
for (vtkNativeLibrary lib : vtkNativeLibrary.values())
{
if (!lib.IsLoaded())
{
System.out.println(lib.GetLibraryName() + " not loaded");
}
}
}
vtkNativeLibrary.DisableOutputWindow(null);
}
// -----------------------------------------------------------------
public static void main(String s[])
{
vtkNamedColors colors = new vtkNamedColors();
//For Background Color
double Bgcolor[] = new double[4];
//Renderer Background2 Color
double Bgcolor2[] = new double[4];
colors.GetColor("Crimson", Bgcolor);
colors.GetColor("NavajoWhite", Bgcolor2);
// Create a sphere for some geometry
vtkSphereSource sphere = new vtkSphereSource();
sphere.SetCenter(0,0,0);
sphere.SetRadius(1);
sphere.SetPhiResolution(30);
sphere.SetThetaResolution(60);
sphere.Update();
// Create scalar data to associate with the vertices of the sphere
int numPts = sphere.GetOutput().GetPoints().GetNumberOfPoints();
vtkFloatArray scalars = new vtkFloatArray();
scalars.SetNumberOfValues( numPts );
for( int i = 0; i < numPts; ++i )
{
scalars.SetValue(i,(float)(i)/numPts);
}
vtkPolyData poly = new vtkPolyData();
poly.DeepCopy(sphere.GetOutput());
poly.GetPointData().SetScalars(scalars);
vtkPolyDataMapper mapper = new vtkPolyDataMapper();
mapper.SetInputData(poly);
mapper.ScalarVisibilityOn();
mapper.SetScalarModeToUsePointData();
mapper.SetColorModeToMapScalars();
vtkActor actor = new vtkActor();
actor.SetMapper(mapper);
actor.GetProperty().SetInterpolationToFlat();
vtkScalarBarActor scalarBar = new vtkScalarBarActor();
scalarBar.SetLookupTable(mapper.GetLookupTable());
scalarBar.SetTitle("Beachball");
scalarBar.SetNumberOfLabels(4);
// Create a lookup table to share between the mapper and the scalarbar
vtkLookupTable seriesLut = new vtkLookupTable();
vtkColorSeries series = new vtkColorSeries();
int seriesEnum = 16;
series.SetColorScheme(seriesEnum);
series.BuildLookupTable(seriesLut, 0);
mapper.SetLookupTable(seriesLut);
scalarBar.SetLookupTable(seriesLut);
// Create the renderer, render window and interactor.
vtkRenderer ren = new vtkRenderer();
vtkRenderWindow renWin = new vtkRenderWindow();
renWin.AddRenderer(ren);
vtkRenderWindowInteractor iren = new vtkRenderWindowInteractor();
iren.SetRenderWindow(renWin);
// Visualize
ren.GradientBackgroundOn();
ren.AddActor(actor);
ren.AddActor2D(scalarBar);
ren.SetBackground(Bgcolor);
ren.SetBackground2(Bgcolor2);
renWin.SetSize(300, 300);
renWin.Render();
iren.Initialize();
iren.Start();
}
}