Voxel Plugin For UE4

[BoredEngineer]

@mordentral;438028

While possible with voxels I would assume that you would get better/easier results with convex hulls / using physx convex hulls for it. They are already built in to whatever accuracy that you set them too and wouldn’t require a new pipeline to implement. You can get the mass / density properties of Physx as well in the bodyinstance and convex shapes data. Using voxels would be more memory intensive (already have the physx data) and potentially less accurate depending on the scale of the volume, voxel data would be better suited for fluid simulation or gas flow or force propagation than something like that I would assume. Also surface area calculation with a hull would be pretty easy to take the surface area of each tri and add them together if using a tight fitting hull wouldn’t it?

There are a number of issues with convex hulls which are not so easy to solve. For example calculation of the volume of overlapping hulls. Calculating volume of the pyramid is easy but calculating volume and center of volume of it’s intersection with another pyramid turns into a costly routine where more than necessary triangles are involved in calculation. Tracing visibility of the triangle is another difficult part - many corner cases where triangle is partially visible but big enough to be significant.
It seams that voxels can handle such cases more gracefully but this is just speculation and I agree with higher memory expense. Perhaps I’m not being eloquent enough. I’ll dig up few papers which describe this approach.