include vtk
load wxvtk
-new LoadHola image
+new LoadHola reader
new PiecewiseFunction color
new PiecewiseFunction opacity
new VolumeRenderer renderer
new Viewer3D viewer
-connect image.Out renderer.In
+connect reader.Out renderer.In
connect color.Out renderer.ColorFunction
connect opacity.Out renderer.OpacityFunction
connect renderer.Out viewer.In1