gradientspace / unrealmeshprocessingtools

Sample Projects/Plugins for Mesh Processing in Unreal Engine

UnrealMeshProcessingTools

Sample projects/plugins for Unreal Engine (https://unrealengine.com) that demonstrate various mesh processing libraries/tools/etc.

The code provided here is provided under the MIT License, except for various subdirectories which are copies of external projects that have different licenses (a LICENSE file exists in the respective top-level folders). These are embedded in the Unreal projects for ease of compiling

• libigl: https://github.com/libigl/libigl
• Eigen: http://eigen.tuxfamily.org/

This is sample code, please do not expect support. You can try @rms80 on twitter, though.

IGLMeshProcessingProject

This project demonstrates use of libigl inside "Interactive Tools" in the Unreal Editor. This code accompanies a quite detailed tutorial available here: http://www.gradientspace.com/tutorials/2020/1/2/libigl-in-unreal-engine

Versions are provided for UE 4.24 and 4.26 (may work with other versions, but only tested with those)

CommandLineGeometryTest

This project demonstrates use of the GeometryProcessing plugin included in UE 4.26. The code accompanies a tutorial available here: http://www.gradientspace.com/tutorials/2020/9/21/command-line-geometry-processing-with-unreal-engine

Provided for UE 4.26 (should work with later versions)

unrealmeshprocessingtools's Issues

'Core': No such file or directory

In UE5.0 use this tool?

New Project Fails to load /Script/RuntimeGeometryUtils.DynamicSDMCActor

Hello, I created a new project with the RuntimeGeometryUtils plugin included, and used the same settings in the uproject file (RuntimeGeometryUtils, ModelingToolsEditorMode, MeshModelingToolset) and Build.cs file. Everything appears to work normally until I reference a DynamicSDMCActor (as a projectile like in your project) and get the following load errors in the editor:

I completely cleaned and rebuilt the project, but same issue. I tried using some of your CoreRedirects in DefaultEngine.ini, but those don't seem to help. Do you remember any special configuration in your project needed to use the DynamicSDMCActor's within the project?

Thanks for this repository, the code is very nice to work with, and your blog is fantastic.

Error when i try to load obj file

Assertion failed: false [File:D:/Build/++UE4/Sync/Engine/Plugins/Experimental/GeometryProcessing/Source/DynamicMesh/Private/DynamicMeshOverlay.cpp] [Line: 367]

UE4Editor_Core
UE4Editor_Core
UE4Editor_DynamicMesh
UE4Editor_RuntimeGeometryUtils!RTGUtils::ReadOBJMesh() [C:\UnrealMeshProcessingTools-master\UnrealMeshProcessingTools-master\UE4.26\RuntimeGeometryDemo\Plugins\RuntimeGeometryUtils\Source\RuntimeGeometryUtils\Private\DynamicMeshOBJReader.cpp:115]
UE4Editor_RuntimeGeometryUtils!ADynamicMeshBaseActor::RegenerateSourceMesh() [C:\UnrealMeshProcessingTools-master\UnrealMeshProcessingTools-master\UE4.26\RuntimeGeometryDemo\Plugins\RuntimeGeometryUtils\Source\RuntimeGeometryUtils\Private\DynamicMeshBaseActor.cpp:150]
UE4Editor_RuntimeGeometryUtils!ADynamicMeshBaseActor::EditMesh() [C:\UnrealMeshProcessingTools-master\UnrealMeshProcessingTools-master\UE4.26\RuntimeGeometryDemo\Plugins\RuntimeGeometryUtils\Source\RuntimeGeometryUtils\Private\DynamicMeshBaseActor.cpp:77]
UE4Editor_RuntimeGeometryUtils!ADynamicMeshBaseActor::OnMeshGenerationSettingsModified() [C:\UnrealMeshProcessingTools-master\UnrealMeshProcessingTools-master\UE4.26\RuntimeGeometryDemo\Plugins\RuntimeGeometryUtils\Source\RuntimeGeometryUtils\Private\DynamicMeshBaseActor.cpp:111]
UE4Editor_CoreUObject
UE4Editor_PropertyEditor
UE4Editor_PropertyEditor
UE4Editor_PropertyEditor
UE4Editor_PropertyEditor
UE4Editor_PropertyEditor
UE4Editor_PropertyEditor
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_Slate
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
UE4Editor_ApplicationCore
user32
user32
InkObj
atlthunk
user32
user32
UE4Editor_ApplicationCore
UE4Editor
UE4Editor
UE4Editor
UE4Editor
UE4Editor
kernel32
ntdll

Missing Eigen/Core!

Looks like the Eigen's .gitignore excludes core
https://gitlab.com/libeigen/eigen/-/blob/master/.gitignore#L11
So, probably due to case sensitivity differences, these files/directories didn't get added to the version of Eigen included here (which in turn resulted in a few plugin build failures until moving them over locally)
https://gitlab.com/libeigen/eigen/-/blob/master/Eigen/Core
https://gitlab.com/libeigen/eigen/-/tree/master/Eigen/src/Core

Smoothing mesehs in editor seems to be working well once those files were added!

Wondering if you'd be open to a PR to add the files?
(Or, unrelated, perhaps open to PR's in general for exposing additional libigl functions as editor tools?)

The project cannot run without HoleyBunny.obj model.

There is no HoleyBunny.obj file in directory "..\..\Source\Programs\CommandLineGeometryTest\HoleyBunny.obj". When this program runs to line 70, this program crashes. Can you add HoleyBunny.obj file to this repository?

Trying to Simplify/Solidify a DynamicPMCActor Crashes Engine

After applying a number of boolean operations to a DynamicPMCActor, it may be desirable to simplify the mesh for performance. However, while the SMC and SDMC actors both work fine, using Simplify or Solidify on a PMC immediately crashes the editor. The simplify option says that it is valid on any kind of Dynamic Mesh Actor, but that is clearly not the case for PMCs. Is this a fundamental limitation of the mesh type, or just a bug that could potentially be fixed?

Error output, after using the 'Solidify' button-box on a PMC sphere:

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000001ff4

UE4Editor_RuntimeGeometryUtils!TDynamicMeshVectorOverlay<float,3,FVector3 >::GetTriElements() [E:\Epic Games\UE_4.27-Bin\Engine\Plugins\Experimental\GeometryProcessing\Source\DynamicMesh\Public\DynamicMeshOverlay.h:531]
UE4Editor_RuntimeGeometryUtils!RTGUtils::UpdatePMCFromDynamicMesh_SplitTriangles() [E:\Epic Games\UnrealMeshProcessingTools\UE4.26\RuntimeGeometryDemo 4.27 - 2\Plugins\RuntimeGeometryUtils\Source\RuntimeGeometryUtils\Private\MeshComponentRuntimeUtils.cpp:115]
UE4Editor_RuntimeGeometryUtils!ADynamicPMCActor::UpdatePMCMesh() [E:\Epic Games\UnrealMeshProcessingTools\UE4.26\RuntimeGeometryDemo 4.27 - 2\Plugins\RuntimeGeometryUtils\Source\RuntimeGeometryUtils\Private\DynamicPMCActor.cpp:52]
UE4Editor_RuntimeGeometryUtils!ADynamicPMCActor::OnMeshEditedInternal() [E:\Epic Games\UnrealMeshProcessingTools\UE4.26\RuntimeGeometryDemo 4.27 - 2\Plugins\RuntimeGeometryUtils\Source\RuntimeGeometryUtils\Private\DynamicPMCActor.cpp:29]
UE4Editor_RuntimeGeometryUtils!ADynamicMeshBaseActor::EditMesh() [E:\Epic Games\UnrealMeshProcessingTools\UE4.26\RuntimeGeometryDemo 4.27 - 2\Plugins\RuntimeGeometryUtils\Source\RuntimeGeometryUtils\Private\DynamicMeshBaseActor.cpp:86]
UE4Editor_RuntimeGeometryUtils!ADynamicMeshBaseActor::SolidifyMesh() [E:\Epic Games\UnrealMeshProcessingTools\UE4.26\RuntimeGeometryDemo 4.27 - 2\Plugins\RuntimeGeometryUtils\Source\RuntimeGeometryUtils\Private\DynamicMeshBaseActor.cpp:426]
UE4Editor_RuntimeGeometryUtils!ADynamicMeshBaseActor::execSolidifyMesh() [E:\Epic Games\UnrealMeshProcessingTools\UE4.26\RuntimeGeometryDemo 4.27 - 2\Plugins\RuntimeGeometryUtils\Intermediate\Build\Win64\UE4Editor\Inc\RuntimeGeometryUtils\DynamicMeshBaseActor.gen.cpp:332]
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
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UE4Editor_Engine
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UE4Editor_Core
UE4Editor_Core
UE4Editor_Core
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor
UE4Editor
UE4Editor
UE4Editor
UE4Editor
UE4Editor
kernel32
ntdll