Extract code from Blender Shaders

Question

Still pretty new to blender here, but wow, i'm really enjoying working with it. Next question i've tried to search for information on, is: Is there any way to extract the input- and output-values from the blender shaders while they are applied to the object/mesh?

E.g. I have a cube, and i have complex setup of shader-nodes attached to that cube. Is there any way for me to dig into the code of those shaders that are attached to the cube? Can only assume the code is written in python, but would be fun to look at and maybe play around with the code.

Going to translate the values to GLSL to customize a fragment shader which I am going to use on the web, if that makes sense(?)

Wish you all a wonderful day!

Answer 1

What i was looking for was the input and output values for each node e.g.:

• Node: Noise Texture.001
• Type: TEX_NOISE
• Input Vector is linked to Noise Texture.002
• Input W has value 0.0
• Input Scale has value 1.4000000953674316 Input Detail has value 2.0
• Input Roughness has value 0.5
• Input Lacunarity has value 2.0
• Input Distortion has value 0.19999998807907104
• Output Fac is not linked
• Output Color is linked to Mix.006

But I figured I'd just had to write a script in Python to extract the information to my console.

I wrote a fairly simple script, there are certainly people here who have far more knowledge than me on this topic, but here is the script I used to query shader node trees from the console:

import bpy

# Specify your material in "Material_Name"
material_name = "Material_name"

# Get the material
material = bpy.data.materials.get(material_name)

if material and material.use_nodes:

    # Get the node tree
    node_tree = material.node_tree
    nodes = node_tree.nodes
    
    # Iterate through the nodes
    for node in nodes:
        print("Node:", node.name)
        print("Type:", node.type)
        for input in node.inputs:
            if input.is_linked:
                linked_node = input.links[0].from_node
                print(f"  Input {input.name} is linked to {linked_node.name}")
            else:
                try:
                    print(f"  Input {input.name} has value {input.default_value}")
                except AttributeError:
                    print(f"  Input {input.name} does not have a default value")
        for output in node.outputs:
            if output.is_linked:
                for link in output.links:
                    linked_node = link.to_node
                    print(f"  Output {output.name} is linked to {linked_node.name}")
            else:
                print(f"  Output {output.name} is not linked")
else:
    print("Material not found or it does not use nodes.")