Describe the issue

Problem
Currently BlenderProc is to be unable to load hair curve entities from a blend file into a new BlenderProc session using the load_blend function in BlenderLoader.py..

Solution
That is because in line 104 valid_object_types is not defined correctly, it should also have a curves in the list.

Reason:
Since Blender 3.3 added its new hair system, there are both curve and curves objects. The former can be added by simply opening Blender and going to Add > Curve > Bezier while the later is created by selecting an object (like the default cube) and then going to Add > Curve > Empty Hair. These two objects are quite different as the curves object can take advantage of the hair geometry nodes and modeling system available.

Anyways, following the documentation available here and here, that means that name for the data block is hair_curves the name for the object type is curves.

The documentation for the param data_blocks should also include hair_curves

Minimal code example

No response

Files required to run the code

No response

Expected behavior

I tested the above changes and adding curves to the valid_object_types list is now able to load hair curves into a new BlenderProc session.

Here is how I'm calling the function:

bproc.loader.load_blend(
    \path\to\blendfile, 
    obj_types = ["mesh", "curves", "hair"],
    data_blocks=["objects", "hair_curves"]
)

BlenderProc version

v2.6.2