The attached filehalf_ellipse example.fsp (225.3 KB) contains half ellipsoid structure:
This is accomplished by using a custom structure that allows the user to specify the shape by a custom equation. The 3D structure is than achieved by using the revolution option:
To make this approach more convenient, we use a structure group that can be parametrized in order to generate the custom equation that is set as a property of the custom structure.
While we use this approach to build an ellipsis/ellipsoid, it can be used for any structure that can be described by an equation as function of x/y/z coordinates.