search

20tab / UnrealEnginePython

Embed Python in Unreal Engine 4
MIT License
2.74k stars 743 forks source link

USkeletalMesh.Materials returns unreal_engine.UScriptStruct #136

Closed osstony closed 7 years ago

osstony commented 7 years ago

As the subject says when I try to get the list of Materials from a USkeletalMesh a list of UScriptStruct objects is returned. Is this expected behavior?

rdeioris commented 7 years ago

Hi, yes it is normal:


from unreal_engine.structs import SkeletalMaterial

skeletal_material = SkeletalMaterial()
skeletal_material.MaterialInterface = your_material_asset

mesh.Materials = [skeletal_material]

...
osstony commented 7 years ago

Thank you @rdeioris. Not sure I fully understand this (I am not fully up to speed on parts of Unreal). What would be your_material_asset? I need to know this ahead of time somehow?

What I'm hoping to get is a list of the UMaterials part of the SkeletalMesh which I can then get all of the UTextures from and finally be able to manipulate the UTexture source paths and reload the textures. Could I do this given only having access to a USkeletalMesh instance?

Unrelated, I have some code I'm working on that allows for adding Toolbar buttons. I will push it up in the next few days for you to check out. I'm not sure I've gone about it in the cleanest way so I would like to get your thoughts on it.

osstony commented 7 years ago

@rdeioris I may have gotten it using:

import unreal_engine
mesh = unreal_engine.get_selected_assets()[0]
for material in mesh.Materials:
    for name, guid in material.MaterialInterface.get_material_texture_parameter_names():
        print material.MaterialInterface.get_material_texture_parameter(name)

Does this seem correct (get_material_texture_parameter_names is a new method I added which I will push up)? I'm not fully understanding the relationships with UScriptStructs, SkeletalMaterials, MaterialInterface and MaterialInstanceConstant which is what is returned when I access UScriptStruct.MaterialInterface. Do you know if there is documentation explaining this anywhere?

rdeioris commented 7 years ago

Hi, i have just uploaded this 'huge' example:

https://github.com/20tab/UnrealEnginePython/blob/master/examples/kaiju_builder.py

hope it will be useful (requires latest code from github)

osstony commented 7 years ago

This is great, thank you!