feat: ability to pass both horizontal and vertical FOV

[fortminors]

blenderpy allows to set either cam.angle or both cam.angle_x and cam.angle_y. Source

It's quite handy to provide this option through blenderproc API

[cla-bot]

For contributing to BlenderProc you need to sign our Contributor License Agreement. As an individual please sign CLA_individuals.pdf, as a company please sign CLA_entities.pdf and send it to [email protected]

[cornerfarmer]

Hey @fortminors,

thanks a lot for the pull request, unfortunately this does not work as intended as blender does not allow setting angle_x and angle_y individually. Each time when setting angle_x/angle_y one is actually changing the focal length. So in your code, when setting angle_y, this would actually overwrite the changes you made to angle_x in the line before. See https://blender.stackexchange.com/a/300728

As blenders camera intrinsics are a bit weird its recommend to set them via our ´set_intrinsics_from_K_matrix()´ method