public void VolumeRender(vtk.vtkImageData VoxelDatat)
{
VoxelData = VoxelDatat;
renWin.AddRenderer(ren1);
iren.SetRenderWindow(renWin);
double[] inputRange = VoxelData.GetScalarRange();
vtk.vtkPiecewiseFunction opacityTransferFunction = new vtk.vtkPiecewiseFunction();
opacityTransferFunction.AddPoint(inputRange[0], 0);
opacityTransferFunction.AddPoint(inputRange[1], 1);
vtk.vtkColorTransferFunction colorTransferFunction = new vtk.vtkColorTransferFunction();
colorTransferFunction.AddRGBPoint(inputRange[0], 1.0, 1.0, 1.0);
colorTransferFunction.AddRGBPoint(inputRange[1], 1.0, 1.0, 1.0);
volumeProperty.SetColor(colorTransferFunction);
volumeProperty.SetScalarOpacity(opacityTransferFunction);
volumeProperty.ShadeOff();
volumeProperty.SetInterpolationTypeToLinear();
volume.SetProperty(volumeProperty);
setRAY();
ren1.AddVolume(volume);
ren1.ResetCamera();
renWin.Render();
addBusyObservers();
iren.Initialize(); iren.Enable();
}
public void UpdateIsoValue(double isovaluet)
{
isovalue = isovaluet;
vtk.vtkPiecewiseFunction opacityIsoTransferFunction = setIsoTF();
volumeProperty.SetScalarOpacity(opacityIsoTransferFunction);
volume.Update();
renWin.Render();
}
public vtk.vtkPiecewiseFunction setIsoTF()
{
double[] inputRange = VoxelData.GetScalarRange();
vtk.vtkPiecewiseFunction opacityIsoTransferFunction = new vtk.vtkPiecewiseFunction();
double per = ((inputRange[1] - inputRange[0]) / 100);
if (isovalue > (inputRange[0] + per))
{
opacityIsoTransferFunction.AddPoint(inputRange[0], 0);
opacityIsoTransferFunction.AddPoint(isovalue - (per), 0);
}
opacityIsoTransferFunction.AddPoint(isovalue, 1);
opacityIsoTransferFunction.AddPoint(inputRange[1], 1);
return(opacityIsoTransferFunction);
}
// This Function converts the selected Points to a VTK transfer function
public vtk.vtkPiecewiseFunction getAlphaTransferFunction()
{
vtk.vtkPiecewiseFunction TransferFunction = new vtk.vtkPiecewiseFunction();
double colorindex = 0; double alpha = 0; double per = 0;
for (int i = 0; i < npoints; i++)
{
// Calulate color index and alpha from selected points
per = (double)pointsx[i] / (width - 1);
colorindex = (1 - per) * inputRange[0] + per * inputRange[1];
alpha = (double)pointsy[i] / height;
TransferFunction.AddPoint(colorindex, alpha);
}
return(TransferFunction);
}
public void setAlphaTransferFunction(vtk.vtkPiecewiseFunction TransferFunction)
{
volumeProperty.SetScalarOpacity(TransferFunction);
renWin.Render();
}
