Surface.PointAtParameter - points doesn't follow the edge

[GABRIEL.PLESEA]

Hi!

I am trying to ad point at the not parallel edges of a slab. I’ve selected the face and made a definition in Dynamo, but the points from slated edge doesn’t follow the line. how should I solve this? can anyone helpme?

[GABRIEL.PLESEA]

Still searching for a solution and not found yet…

[ingenieroahmad]

Why not to get perimeter curves of face and divide the required edge.

[Joelmick]

Hi @GABRIEL.PLESEA,

This is because the surface you see in Dynamo is actually a Trimmed Surface. This is a Grasshopper for a Surface which has been sliced of modified. The Bounds (Parameters) of the surface lie outside the surface.

Red line representing the original surface.

A way to work around this kind of problems is the following:
Extract the Perimeter Curves and Find the curves opposite from eachother And create points using Curve.PointAtParameter (Also what @ingenieroahmad is suggesting :))

[GABRIEL.PLESEA]

Thanks a lot!

I see now how I should proceed!

[solamour]

Another alternative is using Geometry.Intersect and lines by vector

[jacob.small]

This method can help with surfaces which are not vertical in nature (and is a few less nodes):

Note that none of the provided solutions are true parameterization anymore, but that isn’t what you’re after at this point.