How can l use OpenNURBS to create a sphere and extract spheriecal uv coordinates? I do this ouside of Rhino.
Hi @user1718,
Make a semicircle, parameterize it from -pi to pi. Make a surface of revolution and parameterize that direction from 0 to 2pi.
The uv coordinates for any point should be the spherical cords.
If I understand what you want.
– Dale