ba60868477
Imports in the following animated data from UsdGeomCameras: - Focal length - DOF distance - DOF fstop - Clip start, Clip end - Tilt shift x, Tilt shift y - Aperture sizes (with caveats) Implementation wise, it's more complicated than I'd like due to needing to read in both non-animated and animated data for each property. And because I've tried to reduce the duplication of various transforms we have to do on each value. E.g. scaling values by "tenth of scene units" or the extraction of the USD clipping range from a GfVec2f into 2 separate properties, and 2 separate fcurves, in Blender etc. The current approach was the best I could come up with so far. Aperture sizes remain problematic for import, with animation data and without, due to how Blender selects the largest sensor dimension to base downstream calculations on and for which there's no concept in USD to strictly dictate which dimension to use. Additionally, changing the sensor size will impact the Tilt values as well. This means that if the Aperture sizes are animated, we must also animate the tilt values; leads to more fcurves being created than perhaps expected. The `projection` attribute (perspective and orthographic) remains unchanged (non animated only) due to differences in how USD<>Blender interoperate with the Orthographic projection method. Note: Blender only exports perspective cameras due to the same reason. Pull Request: https://projects.blender.org/blender/blender/pulls/137487
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