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extracting a curve from ploys


meshsmooth

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I am working on a contour map that I will have to turn into a mesh. In max I connected the splines (they were broken where the height labels were) then set them to the heights that were labeled. So I had splines running along the contours at the appropriate heights. In order to import the splines from MAX I had to turn them into extruded sections (think ribbons) I exported an OBJ file and now I have these ribbons in Houdini.

How do I turn these ribbons into splines?

Just to make it interesting the ribbons have triangulated faces.

Any ideas on how to turn the contour splines into a mesh that represents the contours faithfully?

post-19-1090887270.jpg

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After some more tinkering I found a primitive SOP if you set the

Face/Hull > Close U = * open

then delete one side of the now wireframe ribbon with a delete Sop

you can add a fuse if you like

but the real challenge will be taking the mess of lines and turning them into a representation of the ground.

post-19-1090915342.gif

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