How can I automate repetitive operations to copy various properties, materials, and rename things using Python?

Question

In my current project I'm facing some strange, but necessary operation to be done with my models, and what is worst, this operation is REALLY annoying when repeated manually again and again for thousand times. Is there any way to script it out?

So here it is:

1. At the beginning, lets say I have two objects. Active is the Original one (ORIG) and the second (selected) is the Clone (CLONE). Firstly, I have to transfer Location, Rotation and Scale from active to selected. I'm using "Copy all to Selected" for this step;

2. Secondly, I have to self-copy a material on selected object (copy existing and rename with that "two sheets of paper" button, so that it would be unique and dont affect on the same materials on other similar objects) and name it exactly as an Object.Name of active object. I DO NOT copy any materials from selected to active. Moreover, this type of material is having a texture, which also has to be recreated (without alpha channel) with 1024x1024 resolution and named as an Object.Name of active object after new material was already made;

3. Finally, selected object has to be renamed itself as an Object.Name of active object + "_A". So in my example it should now be "ORIG_A". I have a solution for this step and it works fine alone:

import bpy

name = bpy.context.active_object.name
suffix = "_A"

for object in bpy.context.selected_objects:
    if not object.name == name:
        object.name = bpy.context.active_object.name + suffix
        break

Please provide any help! I think it's quiete an easy peace of code, but not for a dumb guy like me :(

Answer 1

You can use Python to automate things in Blender. See Blender Python API documentation

A script that does what you describe might look something like this:

import bpy

for o in bpy.context.selected_objects:
    if o == bpy.context.object:
        active = o
    else:
        selected = o
        
selected.matrix_world = active.matrix_world # copy transfr

selected.material_slots[0].material = active.material_slots[0].material.copy()

mat = selected.material_slots[0].material

mat.name = active.name
image = bpy.data.images.new(active.name, 1024, 1024, alpha = False)
image.alpha_mode = 'NONE'  
image.generated_type = 'COLOR_GRID'  

for n in mat.node_tree.nodes:
    if n.type == 'TEX_IMAGE':
        n.image = image
        
selected.name = active.name + "_A"

It might be a good idea to check for unexpected conditions.

Answer 2

import bpy
from bpy import context


def remove_material_slots(object: bpy.types.Object):
    '''
    Remove all the material slots.

    object (bpy.types.Object) - The object to remove material slots from.
    '''
    if object.type == 'MESH' and object.material_slots:
        object.data.materials.clear()


def set_material(object: bpy.types.Object, material: bpy.types.Material, index: int=None):
    '''
    Set material to object.

    object (bpy.types.Object) - Object to set material to.
    material (bpy.types.Material) - Material to set.
    '''
    if object.data.materials and index:
        object.data.materials[index] = material
    else:
        object.data.materials.append(material)


for object in context.selected_objects:
    if object == context.object:
        continue
    
    # Copy Transform
    object.matrix_world = context.object.matrix_world
    
    # Assign Material
#    remove_material_slots(object=object)
    set_material(object=object, material=object.material_slots[0].material.copy())
    
    # Rename Material
    object.material_slots[0].material.name = context.object.name
    
    # Rename Image Texture
    node_tree = object.material_slots[0].material.node_tree
    image = bpy.data.images.new(name=context.object.name, width=1024, height=1024)
    for node in node_tree.nodes:
        if node.type == 'TEX_IMAGE' and node.image:
            node.image = image
    
    # Rename to Active Object
    object.name = f'{context.object.name}_A'
    if object.type == 'MESH':
        object.data.name = f'{context.object.name}_A'

Answer 3

Anyways, here the is solution for my question based on both Karan and Martynas Žiemys answers.

import bpy

for o in bpy.context.selected_objects:
    if o == bpy.context.object:
        active = o
    else:
        selected = o
        
selected.matrix_world = active.matrix_world # copy transfr

selected.material_slots[0].material = selected.material_slots[0].material.copy()

mat = selected.material_slots[0].material

mat.name = active.name
image = bpy.data.images.new(active.name, 1024, 1024, alpha = False)
image.alpha_mode = 'NONE'  
image.generated_type = 'BLANK'  

for n in mat.node_tree.nodes:
    if n.type == 'TEX_IMAGE':
        n.image = image
        
selected.name = active.name + "_A"