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capnslipp / MDLVoxelAsset

The Unlicense
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Not an issue - clarification on loading fbx using modelio #1

Closed johndpope closed 4 years ago

johndpope commented 4 years ago

there's some reference to loading fbx files. Was this on the roadmap? It seems your code is programmed to use modelio.

I'm aware of some libraries that use FBX / swift - but have bumped up against some issues. https://github.com/eugenebokhan/AssetImportKit/issues/14

capnslipp commented 4 years ago

Hi @johndpope,

Loading FBX files— no. The only loading/saving my MDLVoxelAsset library does is to/from MagicaVoxel .vox files. That’s really the goal of MDLVoxelAsset— to add .vox file support to ModelIO.

Once you have a mesh loaded into SceneKit, you can convert it to a voxel array with Apple’s MDLVoxelArray, though I’ve had a lot of trouble getting that to produce sane results, so I’m currently working on my own replacement algorithm for mesh->voxel rasterization. The reverse is also possible (voxel->mesh) and again MDLVoxelArray is Apple’s API for that, which I’ve found horribly buggy, so MDLVoxelAsset has its own mesher.

But in terms of reading/writing FBX files, that’s out of scope for this. I haven’t had much trouble using SceneKit/ModelIO’s built-in FBX stuff, but it seems it isn’t working out as well for you. Side-note: I don’t currently support any of MagicaVoxel’s animation stuff, but I may in the future.

johndpope commented 4 years ago

Thx / SceneKit / dae is fine out of the box. I’m needed to take an animation eg walking and apply it to a t-pose. As per tickets / pulling out my hair. Autodesk should really come to the party here.

capnslipp commented 4 years ago

I imagine you’ve already tried everything sensible, but have you checked how the character animation works in the Apple sample code that was released alongside SceneKit/ModelIO WWDC sessions circa 2015-2018-ish?

I’m sorry I can’t help any more than this. Just not something I’ve needed or explored.

johndpope commented 4 years ago

Checking it out - thanks https://developer.apple.com/videos/play/wwdc2015/602/

johndpope commented 4 years ago

is this the sort of detail your aiming for with voxels? https://ephtracy.github.io/#ss-carousel_ss fyi - got the fbx animations loading with an older assimp / objective-c library https://github.com/johndpope/swift-2