fusion360 animation support

[wallabyway]

Take the animation.json file from Forge Fusion360 svf files, and convert it into glTF animation nodes.

Here's an example http://assemblyinstructionviewer.steelcase.com/Viewer/AssemblyDirectionViewer?AssemblyDirectionID=14667

[petrbroz]

I started working on an initial support for SVF animations: https://github.com/petrbroz/forge-convert-utils/tree/feature/animations. There are a couple of issues we'll need to address before the animations can be properly supported:

• No docs for the JSON schema of SVF animations; would have to reverse-engineer from Forge Viewer
• SVF animations can be hierarchical - what does that mean?
• SVF animations can be applied to meshes, cameras, polylines, etc.; glTF only seems to support animations of node translation, rotation, and scale properties
• SVF animations can be applied to arbitrary dbIDs in the logical hierarchy; in glTF we only export a flat list of leaf nodes

The last one is especially problematic. We would have to either (a) bake the logical hierarchy into the glTF manifest, or (b) read the logical hierarchy during the conversion, and apply the same animation to all descendants of the given dbID.

[petrbroz]

I started working on an initial support for SVF animations: https://github.com/petrbroz/forge-convert-utils/tree/feature/animations. There are a couple of issues we'll need to address before the animations can be properly supported:

• No docs for the JSON schema of SVF animations; would have to reverse-engineer from Forge Viewer
• SVF animations can be hierarchical - what does that mean?
• SVF animations can be applied to meshes, cameras, polylines, etc.; glTF only seems to support animations of node translation, rotation, and scale properties
• SVF animations can be applied to arbitrary dbIDs in the logical hierarchy; in glTF we only export a flat list of leaf nodes

The last one is especially problematic. We would have to either (a) bake the logical hierarchy into the glTF manifest, or (b) read the logical hierarchy during the conversion, and apply the same animation to all descendants of the given dbID.