Flow Graph Path Mapping

[carolhmj]

Changes

• On the SetPropertyBlock, add a new parameter named subString, which represents a string that will be substituted by a node value if encountered between {}. For example, if the subString is nodeIndex, and the path is /node/{nodeIndex}/, when this node is activated, it will look into the nodeIndex socket, and substitute its value (which could be 0, then the path would be /node/0). This allows dynamic paths that are resolved based on the current state of the scene.
  • This change will be needed because of how the glTF Interactivity uses paths. In some cases, paths are defined as /node/{nodeIndex}/property, and we want these paths to be resolved at runtime.
• The SetProperty node was changed to use a configuration object instead of sockets. The configuration object contains a string path (as defined in the context variables), and a string property, such as translation, rotation, etc.
• I also moved the default serialization and parsing functions to a separate module, and added handling of vector values.
• I also removed the variableDefinitions value, as it wasn't being used and made things more complex.

[bjsplat]

Please make sure to label your PR with "bug", "new feature" or "breaking change" label(s).
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[bjsplat]

Please make sure to label your PR with "bug", "new feature" or "breaking change" label(s).
To prevent this PR from going to the changelog marked it with the "skip changelog" label.

[bjsplat]

Snapshot stored with reference name:
refs/pull/14481/merge

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[RaananW]

I think it can be abstracted a bit more, to support future changes.
There should be a path, and a configurable map of replacement values. it should then take the value from the context, based on the map key, instead of fixing the nodeIndex as a property.
GetTargetFromPath can be a static member of FlowGraph (or the context). This was it can be used on other future blocks as well.

[RaananW]

Looks great! just a few nitty comments.