Fix #489

[rcarmo]

I fixed #489 by doing two passes over segments when converting and making sure things are collinear. It works for the simple initial case - I cannot get at the sample files that were linked later.

[hlorus]

The problem with this approach is that curves with a very fine resolution will also have lines that are almost co-linear. This can be provoked by creating a simple circle and setting the "Mesh Curve Resolution" setting in the sketcher panel to a high number, like 200.

[rcarmo]

Well, I could try to check if I'm walking through a circle.

[hlorus]

There's still an error when applying the steps described before:

ValueError: verts: found the same (BMVert) used multiple times
Error: Python: Traceback (most recent call last):
File "/home/yoga/Dropbox/blend/extensions/CAD_Sketcher/operators/set_sketch.py", line 20, in execute
return activate_sketch(context, self.index, self)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/yoga/Dropbox/blend/extensions/CAD_Sketcher/operators/utilities.py", line 148, in activate_sketch
update_convertor_geometry(context.scene, sketch=last_sketch)
File "/home/yoga/Dropbox/blend/extensions/CAD_Sketcher/converters.py", line 238, in update_convertor_geometry
mesh = mesh_from_temporary(
^^^^^^^^^^^^^^^^^^^^
File "/home/yoga/Dropbox/blend/extensions/CAD_Sketcher/converters.py", line 143, in mesh_from_temporary
bmesh.ops.dissolve_verts(bm, verts=edges_to_dissolve)

Also, just as a note: Ideally we would get that is_curve flag from the entity, maybe through attributes.

[rcarmo]

Hmm. I'm not getting that here. What Blender are you running, just for comparison? And can you share a test file?

[hlorus]

Blender 4.4. This is a simple testfile where it happens when i leave the sketch:
circle-resolution.zip
(Just change the file ending from .zip to .blend)