I’m working with a quadrilateral volume (a wall) from which I’ve extracted two large, parallel surfaces (the front and back faces of the wall). I want to create a middle surface exactly halfway between these two faces.
I tried using Pufferfish’s “Tween Two Surfaces” component, which works correctly for some volumes—giving me a proper intermediate surface—but for this particular wall, it only outputs a line.
Both faces are planar and parallel.
The component works fine on similar geometry from other walls, so I’m unsure why it fails here.
I’ve confirmed the surfaces are valid and appear correct in Rhino.
Has anyone encountered a similar issue or knows how to resolve ?
if you place a slider between 0 and 1 in the factor and you play with it you can see why.
It must be something about the domains, the surfaces are planar and parallel but the U or the V domain is flipped (if it was both you would probably get a point as a result for factor=0.5).
It’s like when you have 2 parallel lines (same lenght) but one is flipped: if you tween you get a point at 0.5
It looks like you have a list of walls that have this flipping problem randomly. Rather than picking one by one and flip when necessary, I would suggest finding a workflow that is consistent.
I wolud do it like this:
for every wall extraxt the 2 faces, get the orizontal edge of those, sort them by z, then orient all the 4 lines in the same direction and loft the 2 faces. then tween tween walls.gh (10.7 KB)
