Terrain TIN to Quad Mesh

Being in the civil infrastructure industry I’m often working with imported terrain TIN generated by other programs. These often have lots of of messy triangles that I don’t need, and when trying to cut into earthwork blocks you end up with lots of time consuming solid repairs to fix. More than what Solid Inspector 2 can handle. So I’ve been trying to wrap a quad mesh onto the TIN to simplify the solid and just not getting great results. Using TopoShaper attached is what I end up with. It’s better than what i first got when I tried wrapping onto the full model. So I thought that if I pulled out just some of the top surface items from the model, don’t want the road barrier, and wrapped onto that it might work better. Also thought breaking the model into sections so not doing too big an area in one go might help. It did work a bit better but still not that great. I don’t need it to be 100% correct, but I was hoping it would be better than what I got.

the 2 groups - “1 Original Model & 1 Orignial TIN” are the models I received from the designers I’m trying to simplify.

So is there a way of doing this in SketchUp without have to go in and manipulate the quad mesh to what you need?

Or is there another program that can do this?

Quad Mesh.skp (2.1 MB)

Do you want a surface like this?

wow Mihai, that’s awesome. what program is that?

would like to end up with the whole thing meshed, excluding the road barriers.

It’s Blender with and extension for remesh

I divided the TIN into 3 areas, as it probably would be in reality.

hang that looks quick. I guess I need to get Blender then.

thanks so much Mihai, really appreciated

You’re welcome!
You can also do it in SketchUp, with Soap Skin and Bubble extension, but you will have a mix of tris and quads. Maybe that’s enough for you.

Thanks Mihai, hadn’t found the AE extension yet. Thats looking good now.

mc_AlignEnds - SketchUp Plugins | PluginStore | SketchUcation

I fixed a bit one of the models in your file, Then I used that plane you drew under the terrain and divided using split-up tools from TIG, and finally Mc Align Ends, I activated the Quad mesh analysis on the overlays so you can see that it´s all quads cause it looks green.




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An workflow for remeshing a TIN terrain into a surface (not neccessary full quads, but it can be) suitable for working in SketchUp (2k tris, 1k faces).

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thanks Mihai, very helpful

@Ed_68 Have you tried @Matheron plugin to work with terrains? They have Holygon Lanscape, you should try it.

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thanks Rafael, that look like an amazing set of tools. Haven’t had the time to use them yrt but looking forward to.