curved-cut along a tube with open-ends

[jlopezbi]

Hi,

I'm super excited to see all this work you have been doing for cutting meshes! I'm working on a project using the blender api to automatically perform a series of splits to a mesh. For the most part I can use bmesh.ops.bisect_plane, but I need to do a curved cut as well.

Here is an image describing the operation:

The current strategy uses the blender boolean modifier to make the cut (really two operations to isolate the front and back). A 'cutting-mesh' is created that bridges the two cut-polylines. Unfortunately the boolean sometimes fails, and I'm not sure why! :(

It seems a custom operator that works with blender bmeshes directly is needed. Do you have any pointers for creating such an operation?