// Sets up highway visualization with a center line.
// The center line will be 2 pixels wide dashed line.
// With an orthogonal offset of 5 pixels a left and right 
// bounding line will be visualized.
public static void setUpHighwayVisualizationWithCenterLine(
    VisualizationOperator visualizationOperator)
{
    // Create a LineVisualizer for the center line
    LineVisualizer centerLineVisualizer = new LineVisualizer();

    // Set the condition that the center line visualizers is only applied to RoadClass 1
    centerLineVisualizer.setCondition(new Condition("RoadClass = 1"));

    // Set the center line visualizer LengthUnit to pixels (Default is pixels). 
    centerLineVisualizer.setLengthUnit(
        new DirectVisualizerLengthUnitAttributeVariable(VisualizerLengthUnit.PIXELS));

    // Set the center line width to 2 pixels
    centerLineVisualizer.setWidth(new DirectDoubleAttributeVariable(2.0));

    // Set the center line style to dashed
    centerLineVisualizer.setStyle(new DirectLineStyleAttributeVariable(LineStyle.getDashes1()));

    // Enable anti alias
    centerLineVisualizer.setAntiAlias(new DirectBoolAttributeVariable(true));

    // Set the color to red
    centerLineVisualizer.setColor(new DirectColorAttributeVariable(java.awt.Color.RED));

    // Create a LineVisualizer for the left bounding line
    LineVisualizer leftBoundingLineVisualizer = new LineVisualizer();

    // Set the condition that the bounding line visualizers is only applied to RoadClass 1
    leftBoundingLineVisualizer.setCondition(new Condition("RoadClass = 1"));

    // Set the left bounding line visualizer LengthUnit to pixels (Default is pixels). 
    leftBoundingLineVisualizer.setLengthUnit(
        new DirectVisualizerLengthUnitAttributeVariable(VisualizerLengthUnit.PIXELS));

    // Enable anti alias
    leftBoundingLineVisualizer.setAntiAlias(new DirectBoolAttributeVariable(true));

    // Set the color to red
    leftBoundingLineVisualizer.setColor(new DirectColorAttributeVariable(java.awt.Color.RED));

    // Set the orthogonal offset to 5 pixels to the left
    leftBoundingLineVisualizer.setOrthogonalOffset(new DirectDoubleAttributeVariable(5.0));

    // Clone the left bounding line visualizer and reuse it as right bounding visualizer
    LineVisualizer rightBoundingLineVisualizer = 
        (LineVisualizer)leftBoundingLineVisualizer.clone();

    // Set the orthogonal offset to 5 pixels to the right (-5)
    rightBoundingLineVisualizer.setOrthogonalOffset(new DirectDoubleAttributeVariable(-5.0));

    // Add the line visualizers to the visualization operator
    Guard guard = new Guard();
    try
    {
        visualizationOperator.getVisualizers().add(centerLineVisualizer);
        visualizationOperator.getVisualizers().add(leftBoundingLineVisualizer);
        visualizationOperator.getVisualizers().add(rightBoundingLineVisualizer);
    }
    finally
    {
        guard.dispose();
    }
}