I want to create a blend between 2 surfaces, and I’m working with bezier surfaces. The new enhanced blend now respects the structure of the edge if the edges have the same structure, but with the surfaces I’m working now the blend result is not what I expected, even if I extract the edges or create a loft between the edges the result is more complex than expected.
If I rebuild the surfaces with the same degree and points then everything works fine, the form changes… but it works.
So, what I want to know is why should I rebuild the surface to get a surfaces that respect the original structure of the edges. Or what is wrong with this edges or surfaces?
Then I tried rebuilding the edges of the original surfaces and again the result was fine.
So my second question is: if a surface is untrimmed, why is the structure of the edge different to the edge?
Attached is the V6 file, I’ll appreciate any help.
Joaquín, check your original surfaces, they seem to be ‘trimmed’. So those edges aren’t single span. If you do an ‘untrim’ operation on both surfaces then run the blend again it works as expected.
It seems you found the cause, I used ADSurfaceSplit from VSR, the command in case you don’t know, works like a trim but preserving the original shape and rearranging the points to create an untrimmed surface. This is the first time I have this problem. Apparently in this case that I used a double curvature surface to trim the command rebuilt the edge.
Yes I agree we should have better tools for surface modeling with Bezier. Fortunately some are improving.
I must confess that some years ago I didn’t know how good was to work with the minimum degree and simple structure of the surfaces, but once I knew it I can’t go back.