Attribute space is ignored for viewdirection node

[hybridherbst]

Seems the viewdirection node has a space property but it actually doesn't do anything in https://academysoftwarefoundation.github.io/MaterialX/,

when modifying space to model | object | world the result is identical:
edge_brighten copy.mtlx.zip

Is this intentional?

[jstone-lucasfilm]

Good catch, @hybridherbst, and it looks like only the OSL implementation of viewdirection supports the space property in the initial pull request. This would be a much appreciated contribution if developers in the community have the bandwidth to extend this support to GLSL and MSL.

https://github.com/AcademySoftwareFoundation/MaterialX/blob/main/libraries/nprlib/genosl/nprlib_genosl_impl.mtlx#L15