[FEATURE]: render correspondence map of deformable objects

[eugenelyj]

Description
I find the only supported way to render correspondence map existed in blenderproc is render_nocs. However, it is not suitable for the deformable objects like a dancing human (i.e., Armature).

Describe the solution you'd like
A possible way to do this i thought is to render uv corrdinate. Is it easy to implement in current framework?

[cornerfarmer]

This should be pretty simple to implement. You just need to add a enable_uv_output function to the RendererUtility, similar to e.g. enable_diffuse_color_output. Just use "UV" here instead of "DiffCol":

BlenderProc/blenderproc/python/renderer/RendererUtility.py

Line 501 in aa2b5b9

final_output = render_layer_node.outputs["DiffCol"]

Then in the render function add "uv" to the load_keys set:

BlenderProc/blenderproc/python/renderer/RendererUtility.py

Line 641 in aa2b5b9

load_keys = {'colors', 'distance', 'normals', 'diffuse', 'depth', 'segmap'}

If enabled, uvs should now be rendered using the standard bproc.renderer.render() method.

Let me know if you need any more help. If you want, you can create a PR in the end.

[eugenelyj]

@cornerfarmer Thanks for your quick response :) I will try to create a PR

[cornerfarmer]

Hey @eugenelyj, any updates here?