Here's a kind of simple example, see the attached 3DM file. Generate an isocurve along the plane like this:
If you now generate an isocurve on the sphere at that same ending location, you'll get a result like this:
The plane isocurve follows the UV structure of the plane, the sphere isocurve follows the UV structure of the sphere, each of those surfaces has a fairly different control point grid structure to it, and so their isocurves do not follow a total straight path when done segment-by-segment like that.
If you want something that follows a straight cut path across surfaces, that's going to be a planar intersection curve which is a different type of generation process than an isocurve. You can get a planar intersection result by projecting a line onto the object though.
- Michael |
