Camera

VTKExamples/Java/Visualization/Camera


Description

vtkCamera object is a virtual camera for 3D rendering.

It provides methods to position and orient the view point and focal point. Convenience methods for moving about the focal point also are provided.

Other Languages

See (Cxx), (Python)

Question

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Code

Camera.java

import vtk.vtkActor;
import vtk.vtkSphereSource;
import vtk.vtkNativeLibrary;
import vtk.vtkPolyDataMapper;
import vtk.vtkCamera;
import vtk.vtkRenderWindow;
import vtk.vtkNamedColors;
import vtk.vtkRenderer;
import vtk.vtkRenderWindowInteractor;

public class Camera 
{
  // -----------------------------------------------------------------
  // 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("DeepSkyBlue", actorColor);
    colors.GetColor("Coral", Bgcolor);

    //Create a Sphere
    vtkSphereSource Sphere = new vtkSphereSource();
    Sphere.SetCenter(0, 0, 0);
    Sphere.SetRadius(1.0);
    Sphere.Update();

    //Create a Mapper and Actor
    vtkPolyDataMapper Mapper = new vtkPolyDataMapper();
    Mapper.SetInputConnection(Sphere.GetOutputPort());

    vtkActor Actor = new vtkActor();
    Actor.SetMapper(Mapper);
    Actor.GetProperty().SetColor(actorColor);

    //Setting up Camera
    vtkCamera Camera = new vtkCamera();
    Camera.SetPosition(0, 0, 20);
    Camera.SetFocalPoint(0, 0, 0);

    // Create the renderer, render window and interactor.
    vtkRenderer ren = new vtkRenderer();
    ren.SetActiveCamera(Camera);
    vtkRenderWindow renWin = new vtkRenderWindow();
    renWin.AddRenderer(ren);
    vtkRenderWindowInteractor iren = new vtkRenderWindowInteractor();
    iren.SetRenderWindow(renWin);

    // Visualize the Actor
    ren.AddActor(Actor);
    //Setting up the Renderer Background Color.
    ren.SetBackground(Bgcolor);

    renWin.SetSize(300, 300);
    renWin.Render();

    iren.Initialize();
    iren.Start();
  }
}