PerlinNoise
vtk-examples/Java/Filtering/PerlinNoise
Description¶
vtkPerlinNoise object computes a Perlin noise field as an implicit function.
Perlin noise, originally described by Ken Perlin, is a non-periodic and continuous noise function useful for modeling real-world objects.
Question
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Code¶
PerlinNoise.java
import vtk.vtkRenderWindow;
import vtk.vtkActor;
import vtk.vtkNativeLibrary;
import vtk.vtkPolyDataMapper;
import vtk.vtkNamedColors;
import vtk.vtkRenderer;
import vtk.vtkRenderWindowInteractor;
import vtk.vtkPerlinNoise;
import vtk.vtkSampleFunction;
import vtk.vtkContourFilter;
public class PerlinNoise
{
//-----------------------------------------------------------------
// 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 args[])
{
vtkNamedColors colors = new vtkNamedColors();
//For Actor Color
double actorColor[] = new double[4];
//Renderer Background Color
double Bgcolor[] = new double[4];
colors.GetColor("Chartreuse", actorColor);
colors.GetColor("DarkSalmon", Bgcolor);
vtkPerlinNoise perlinNoise = new vtkPerlinNoise();
perlinNoise.SetFrequency(2, 1.25,1.5);
perlinNoise.SetPhase(0, 0, 0);
vtkSampleFunction Sample = new vtkSampleFunction();
Sample.SetImplicitFunction(perlinNoise);
Sample.SetSampleDimensions(65, 65, 20);
Sample.ComputeNormalsOff();
vtkContourFilter Surface = new vtkContourFilter();
Surface.SetInputConnection(Sample.GetOutputPort());
Surface.SetValue(0, 0);
vtkPolyDataMapper mapper = new vtkPolyDataMapper();
mapper.SetInputConnection(Surface.GetOutputPort());
mapper.ScalarVisibilityOff();
vtkActor actor = new vtkActor();
actor.SetMapper(mapper);
actor.GetProperty().SetColor(actorColor);
//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 the actor
ren.AddActor(actor);
ren.SetBackground(Bgcolor);
renWin.SetSize(300, 300);
renWin.Render();
iren.Initialize();
iren.Start();
}
}