How to obtain the X and Y coordinates of vertices on curves or line segments in GDL programming

[baixiaodong]

How to obtain the X and Y coordinates of vertices on a curve or line segment in GDL writing, and drive a point on another line segment through these coordinates?

I am planning to use the REVOLVE command to create a jar model. The upper and lower materials of the jar model are different, and the REVOLVE command cannot allocate different materials for the weft part. Therefore, I need to use two REVOLVE commands to create the upper and lower parts of the jar separately, in order to meet the requirements of attaching different materials. As the jar model is parameterized, the upper and lower parts will be linked and seamlessly connected, This requires the vertex at the end of the lower part to drive the starting vertex of the upper part. I think so, but I haven't found a feasible method yet.

Please advise

[baixiaodong]

Hello: Thank you for your guidance. I will continue to explore

[Pertti Paasky]

Try this command, You can allocate material for every segment.
REVOLVE{2} n, alphaOffset, alpha, mask, sideMat,
x1, y1, s1, mat1, ..., xn, yn, sn, matn

[baixiaodong]

Thank you