Hi, V5
unable to trim the blue rectangle part from the blue with the pink surface.
why ?
no bad objects
they intersect with a line, use the line then , still fails.
the arc surface didnt intersect , so I was unable to trim the pink away from within its structure. (that moved off to one side) so I added the rectangle surface and joined it, then tried to trim it, .
Hello Steve,
I am not convinced that I have the correct technical reason but perhaps the trim failed because the objects are grouped and as you indicate not planar. So I was able to use split with a poly object. The result does not appear flush but that could be because the poly was not a perfect boarder match to the base surface. Irrespective maybe this is the general way to proceed.
I only downloaded simple trim fail surfaces.3dm 1.7 and looked at that.
The object you want to trim with is not completely intersecting your blue surface. You could and this is what I did select the
lowest curves on the blue surfaces
using ctrl-shift
then extrude those
then move them up so they intersect
then use the trim command.
That’s the problem. Rhino really should identify the blue object in your first file as a bad object. Its got a ridiculous boundary definition that collapses in on itself.
I was able to explode the blue polysurface and join it back and then trimming works.
The blue structure in your second file is a group of surfaces. You should ungroup and join the surfaces. I don’t know why the blue and the pink don’t produce a complete intersection curve. That looks like another bug to me.
You can use DupBorder on the blue (after you turn it into a polysurface) and the border curve will work to trim the pink and then it looks like the pink and blue join OK.