VisIt Contour Plots
A Contour Plot displays lines (for 2-D plots) and surfaces (for 3-D plots). The 2-D Contour Plot is called an isoline. The 3-D Contour Plot is called an isosurface. These lines or surfaces are places where the scalar values are all the same in a VisIt database. In VisIt, creating a contour (a.k.ai., isosurface) is relatively straightforward. First, choose the variable from which you want to create the contour.
- In the Plot Manager section of the VisIt Main Window, select Plots->Contour and choose the scalar variable that you want.
- In the Plot Manager section, select OpAtts->Contour. This will allow you to change the contour value. By default, VisIt chooses 10 levels that are linearly spaced between the minimum and maximum values. For a single isosurface, change the Select by pull-down menu to Value(s) and input a single value.
- Click on Apply.
- Click on the Draw button in the Plot Manager section.
- At this point, you will have an isosurface (or if you like, a single contour) displayed on the screen.