Isosurface Isolines
This Actor generates isolines for a quantity on the isosurface generated from another quantity.
An isoline connects points of a surface where the magnitude of a certain quantity (such as wind velocity) takes a constant value. For example, you can construct isolines of wind velocity on the isosurface of 20m terrain elevation. Usually multiple isolines of different values are constructed for a chosen quantity to illustrate the variation of the quantity values on the surface.
For a chosen quantity, this Actor automatically extracts the minimum and maximum values at points on the isosurface and allows you to specify the number of isolines that you want to construct within this range.
You can also customize the minimum and maximum limits used to color map the data to highlight a particular value range. By default, they are set to the extracted minimum and maximum values.
The only difference between this Actor and the OrthoSliceIsoLines is that this Actor constructs isolines on an isosurface whereas the OrthoSliceIsoLines Actor constructs isolines on an orthoslice –– a slice plane of the domain volume that is orthogonal to the Domain's X, Y, or Z axis. Therefore, to use this Actor, you need to specify the following in order to define the isosurface first:
- a quantity based on which to construct the isosurface
- value of the quantity from which the isosurface can be extracted.
The following is an example of the isolines of wind velocity on the isosurface of 20m terrain elevation at a certain time spot.
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