### Description

This example shows modal lines for a vibrating rectangular beam. The vibration mode in this figure is the second torsional mode, clearly indicated by the crossing modal lines.

The default color scheme shows cool color for maximum negative motion, warm color maximum positive motion, with white at the nodes.

For other possible color maps see: [Diverging Color Maps for Scientific Visualization](http://www.kennethmoreland.com/color-maps/).

!!! info
    See [Figure 6-15](/VTKBook/06Chapter6/#Figure%206-15) in [Chapter 6](/VTKBook/06Chapter6) the [VTK Textbook](/VTKBook/01Chapter1).
