I’m trying to configure a spline dynamically. I can set point locations and tangents, and a “Default Up Vector” which applies to the entire spline. But, logically, the Up vector can be different for each point (as long as it’s orthogonal to the tangent). I can’t find any API to do this with, though.
Not a hypothetical problem: I’m generating something like a tunnel based on the spline, and the up vector is important, especially at the first and last point. I’m doing some crazy workarounds which attempt to guess an appropriate up vector but nothing looks quite right.