ParaView Usage
1. click eye icon to hide the box
2. use "calculator" before "contour", and rename the "Result Array Name", so different contour can have different color property
3. animation. choose "camera" and "orbit". Control the saved animation video time by setting the frame rate in the last step. set the "No. Frames:" to be about 200, "End Time" about 1.
4. different labels. by setting the value range, you can include different labels to show.
