Hi,
I have surface that I want to trim but it doesn’t work. I have tried to do a trim with a straight line and then it works which for me indicates that it is the cutting object that it is the problem. I have created the cutting object about ten times but no luck. Can anybody take a look at the attached file and figure out what the problem is.
It is the green surface that is the Cutting object.
Any help is greately apreciated
Thanks,
Roger
SurfaceToTrim.3dm (591.9 KB)
Try to move slightly your cutter, and that works.
I tried Cyver’s idea and it didn’t work. BUT you have meshes, NOT surfaces. Rhino is not a strong mesh manipulator. Perhaps play a bit with weld or tolerances.
If I find out something, I’ll repost.
Generally, if your trimming line or surface passes through a mesh vertex at the corner of a facet, the Trim will fail.
This is a major known limitation.
Internally, we techs have a list called “Tech Top Ten”. These are the issues that cause us and users the most pain. They are prioritized for development attention as a result. The top, most painful one is the general poor state of mesh trimming and Boolean tools. They are being worked on.
Thanks for all your input, I got it working now buy moving geometry slightly,
John, good to know about the corner vertexes problem, it was one of the thoughts I had when it worked by moving the object. I will adjust my trims in the future and good to know that it isn’t only me.
Thanks again,
Roger
on such simple geometry you can also use MeshtoNurb to split it off as Nurbs, then reconvert it back to mesh with option simple plane. the mesh will look the same with slight further tessellation around the split area.
SurfaceToTrim.3dm (223.8 KB)