Returns the number of knots (also known vertices or control points) in the indexed spline as an integer. If the spline index is not specified, returns the number of knots in the entire shape.
i have been looking through the docs and have found geom.getVertexCount
You seem to intend to implement a 3d editor, I suggest using one to create such meshes or looking into how they do it usually and then constructing the mesh: https://wiki.jmonkeyengine.org/legacy/doku.php/jme3:advanced:custom_meshes
jME is not a mesh editing library, its a game engine.
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i don’t think jME has any support for splines, and you would have to construct the splines out of the mesh anyways, and for an arbitrary 3D model I don’t see this ending well. But you should be able to turn a 2D spline into a 3D suface fine enough (and get the number of knots out of that), but you’d have to implement that stuff yourself. As normen said, we aren’t an editor/engineering program, so the number of knots isn’t really important to us, but i think some basic spline support in jME could be beneficial