how to set the path of a Textre node manually?

momoko

Lovely people,

Is this a wrong attempt to set the Path of a Texture node manually?

def create_material(self):
        doc = c4d.documents.GetActiveDocument()
        material = c4d.BaseMaterial(c4d.Mmaterial)
        if not material:
            raise MemoryError(f"{material = }")
        doc.InsertMaterial(material)
    
        # Get the node material for it and add a graph for the currently active material space to it.
        node_material = material.GetNodeMaterialReference()
        graph = node_material.CreateDefaultGraph(c4d.GetActiveNodeSpaceId())
        if graph.IsNullValue():
            raise RuntimeError("Could not add graph to material.")
        
        # Start a transaction to modify the graph
        with graph.BeginTransaction() as transaction:
            # Get texture files from the selected folder
            texture_files = self.print_allowed_files_in_folder(self.FOLDER_PATH)
    
            # Add texture nodes to the material graph for each texture file
            for texture_file in texture_files:
                texture_node = graph.AddChild(maxon.Id(), maxon.Id("com.redshift3d.redshift4c4d.nodes.core.texturesampler"))
                if texture_node is None:
                    continue
                
                # Set the texture file path
                path_port = texture_node.GetInputs().FindChild("com.redshift3d.redshift4c4d.nodes.core.texturesampler.tex0").FindChild("path")
                path_port.SetDefaultValue(maxon.Url("file:///" + texture_file))  # Assuming local file path
    
                # Connect the texture node to the output node of the material
                output_port = graph.GetOutputPort(0)  # Get output port of the material
                texture_color_port = texture_node.GetOutputs().FindChild("com.redshift3d.redshift4c4d.nodes.core.texturesampler.outcolor")
                texture_color_port.Connect(output_port, modes=maxon.WIRE_MODE.NORMAL, reverse=False)
    
        # Commit the transaction to apply the changes to the graph
        transaction.Commit()

ferdinand

Hey @momoko,

Thank you for reaching out to us. That depends what you mean by "is this a wrong attempt to set the Path of a Texture node manually?.

The lines

path_port = texture_node.GetInputs().FindChild(
    "com.redshift3d.redshift4c4d.nodes.core.texturesampler.tex0").FindChild("path")
path_port.SetDefaultValue(maxon.Url("file:///" + texture_file))  # Assuming local file path

are the correct statements to address the path component of a Filename port bundle in a Texture node and then set its value. It depends here a bit what the author meant with "local" file, if he/she meant an URL in the file scheme/protocol, than this is the correct syntax. When texture_file is meant to be a relative path, you would have to use the relative:/// URL scheme.

The code before these two lines is also okay, but the code after these two lines is pure gibberish.

No offense, but your code somewhat strikes me as chat-bot (ChatGPT, CoPilot, etc.) generated. We do not support chat-bot output. They are helpful tools, but we cannot fix the gibberish they will come up with from time to time.
We have multiple Nodes API Python examples and create_redshift_nodematerial_2024.py is very close to what you want to do here.
When the Nodes API is too much for you, you could have a look at graph descriptions. They are more artist friendly, and loading a bunch of textures there should be pretty straight forward.

Cheers,
Ferdinand

ferdinand

Hey @momoko,

please do not delete topics to which we have already answered. I am not sure if this is tied to you either having found a solution yourself, or that I pointed out that your code looks chat-bot-ish because it contains made-up function calls.

I have restored the topic, so that future readers can see our answer here.

Cheers,
Ferdinand

momoko

@ferdinand I found a solution. Sorry

ferdinand

No need to be sorry