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How to get triangles of a Static Mesh?

I am trying to get all the triangle's vertices on a static mesh.

Product Version: UE 4.9
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asked Nov 29 '15 at 02:19 AM in C++ Programming

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Mr. Mechanical
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UStaticMesh has varable called RenderData which is FStaticMeshRenderData

https://docs.unrealengine.com/latest/INT/API/Runtime/Engine/FStaticMeshRenderData/index.html

there is LODResources which contains mesh data for each LOD

https://docs.unrealengine.com/latest/INT/API/Runtime/Engine/FStaticMeshLODResources/index.html

In there you can access VertexData and so on and other stuff, dive in to API refrence ;]

No sure if you need to do somethign before accessing this date, maybe you need to call Build() in UStaticMesh. It's some breef info i dig out for you.

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answered Nov 29 '15 at 05:08 AM

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Shadowriver
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avatar image Mr. Mechanical Nov 29 '15 at 03:58 PM

Thanks a lot for responding! I really appreciate it!

avatar image Mr. Mechanical Nov 29 '15 at 04:02 PM

Unfortunately, I can't find anything in either link that tells me what vertices make up each triangle.

avatar image Burnrate Nov 09 '16 at 05:04 PM

Do you know how to expose the render data to cpu in a packaged build?

avatar image Richmar1 Feb 23 '19 at 12:51 AM

@Burnrate I believe there is a setting in the static mesh editor that states "check this box to keep render data on cpu"

avatar image Burnrate Feb 23 '19 at 02:43 AM

There was a lot of high res meshes with multiple LODs I wanted info from so I didn't want to keep all that in RAM.

I was able to setup some Enqueue render commands in order to read the specific vertex data I needed from the specific mesh and LOD and memcpy it into an array. Then I sent it to a thread to be iterated over and provide the information I needed during gameplay.

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