How to Bevel Selected Edges in Blender Using Python

In Blender, you can bevel only the selected edges of a mesh using Python in the scripting workspace. This allows for precise control over the edges you want to modify. By following the steps below, you can achieve this customization efficiently.

Step 1: Setting Up the Script

To begin, create a new script in Blender's scripting workspace and import the necessary modules:

import bpy
import bmesh

Next, obtain a reference to the currently active object that contains the mesh you intend to work with. Ensure that the object is in edit mode to access its edit mesh data using the from_edit_mesh method of the bmesh module.

obj = bpy.context.active_object
mesh = obj.data
bm = bmesh.from_edit_mesh(mesh)

Step 2: Selecting Edges

To work with selected edges specifically, use a list comprehension to filter out only the selected edges:

selected_edges = [e for e in bm.edges if e.select]

This creates a new list (selected_edges) containing only the edges that are currently selected within the mesh.

Step 3: Applying the Bevel

Now, it's time to run the bevel operator on the selected edges of the mesh. Specify the desired bevel settings such as offset, profile, and segments:

bmesh.ops.bevel(bm, geom=selected_edges, offset=0.1, profile=0.5, segments=3)

By executing this operation, you instruct Blender to bevel the selected edges according to the specified parameters.

Step 4: Updating the Mesh

After applying the bevel, ensure that the mesh is updated to reflect the changes made:

bmesh.update_edit_mesh(mesh)

This step refreshes the mesh data to display the newly beveled edges accurately.

Step 5: Freeing Resources

To finalize the process, free the bmesh data that was used for editing:

bmesh.free(bm)

This action releases the edited mesh data, maintaining a clean workspace for further modifications.

Example: Beveling Selected Edges

Let's consider a practical example with a cube. Navigate to edit mode, select the edges you wish to bevel, and run the script. Upon execution, only the selected edges will be beveled, demonstrating the targeted edge modification achieved through Python scripting.

By following these steps, you can effectively bevel specific edges of a mesh in Blender using Python, offering enhanced control and precision in your modeling workflow.

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Meta description: Learn how to bevel selected edges in Blender using Python scripting for precise mesh editing. Follow a step-by-step guide with practical examples.

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