Method mouseDragged

Wrapping/Java/vtk/vtkPanel.java:273–351

(MouseEvent e)

  }

  public void mouseDragged(MouseEvent e)
  {
    if (ren.VisibleActorCount() == 0)
      return;
    int x = e.getX();
    int y = e.getY();
    // rotate
    if (this.InteractionMode == 1)
    {
      cam.Azimuth(lastX - x);
      cam.Elevation(y - lastY);
      cam.OrthogonalizeViewUp();
      resetCameraClippingRange();
      if (this.LightFollowCamera == 1)
      {
        lgt.SetPosition(cam.GetPosition());
        lgt.SetFocalPoint(cam.GetFocalPoint());
      }
    }
    // translate
    if (this.InteractionMode == 2)
    {
      double FPoint[];
      double PPoint[];
      double APoint[] = new double[3];
      double RPoint[];
      double focalDepth;

      // get the current focal point and position
      FPoint = cam.GetFocalPoint();
      PPoint = cam.GetPosition();

      // calculate the focal depth since we'll be using it a lot
      ren.SetWorldPoint(FPoint[0], FPoint[1], FPoint[2], 1.0);
      ren.WorldToDisplay();
      focalDepth = ren.GetDisplayPoint()[2];

      APoint[0] = rw.GetSize()[0] / 2.0 + (x - lastX);
      APoint[1] = rw.GetSize()[1] / 2.0 - (y - lastY);
      APoint[2] = focalDepth;
      ren.SetDisplayPoint(APoint);
      ren.DisplayToWorld();
      RPoint = ren.GetWorldPoint();
      if (RPoint[3] != 0.0)
      {
        RPoint[0] = RPoint[0] / RPoint[3];
        RPoint[1] = RPoint[1] / RPoint[3];
        RPoint[2] = RPoint[2] / RPoint[3];
      }

      /*
       * Compute a translation vector, moving everything 1/2 the distance
       * to the cursor. (Arbitrary scale factor)
       */
      cam.SetFocalPoint((FPoint[0] - RPoint[0]) / 2.0 + FPoint[0],
        (FPoint[1] - RPoint[1]) / 2.0 + FPoint[1], (FPoint[2] - RPoint[2]) / 2.0 + FPoint[2]);
      cam.SetPosition((FPoint[0] - RPoint[0]) / 2.0 + PPoint[0],
        (FPoint[1] - RPoint[1]) / 2.0 + PPoint[1], (FPoint[2] - RPoint[2]) / 2.0 + PPoint[2]);