peakColorMap = new ConstantMap[]{new ConstantMap(0.5, Display.Red),
new ConstantMap(0.0, Display.Green),
new ConstantMap(0.0, Display.Blue)};
// Create a pick renderer, so we can track user clicks.
pickRenderer = new PickManipulationRendererJ3D();
// Data reference for peaks.
peaksReference = new DataReferenceImpl("peaks");
peaksShown = false;