Blender API Question - rotation about center of object

Question

I am running the following code. I would like to rotate the selected blocks about the x-axis in the center. However, it is rotating about the corner. Can I ask for assistance?

import bpy
from mathutils import Matrix, Vector
import math

angle = math.radians(45)


for obj in bpy.data.objects:

    if(obj.location.x > 1.1):
        obj.select_set(True)
        print(obj.location.x)
        bpy.context.view_layer.objects.active = obj



  bpy.ops.transform.rotate(value=math.radians(90) , orient_axis='X')
  print("hello33")

there is similar portal Blender Stack Exchange -- I don't know but maybe it will be better for you. — furas
– furas, Commented Mar 6 at 8:27
reddit also has forum: Python: Rotate multiple objects around Bounding Box Center? : r/blender — furas
– furas, Commented Mar 6 at 8:30

gilu · Accepted Answer · 2025-03-06 13:02:09Z

I just played around a bit and came up with this:

import bpy
from mathutils import Matrix, Vector
import math

angle = math.radians(45)

# store old pivot setting
old_pivot = bpy.context.scene.tool_settings.transform_pivot_point 
# set pivot point to bounding box
bpy.context.scene.tool_settings.transform_pivot_point = "BOUNDING_BOX_CENTER"
# --> https://docs.blender.org/api/current/bpy.types.ToolSettings.html#bpy.types.ToolSettings.transform_pivot_point

for obj in bpy.data.objects:
    if(obj.location.x > 1.1):
        obj.select_set(True)
        print(obj.location.x)
        bpy.context.view_layer.objects.active = obj

bpy.ops.transform.rotate(value=math.radians(45), orient_axis='X')

# restore old pivot setting
bpy.context.scene.tool_settings.transform_pivot_point = old_pivot

I only added the three lines. One to store the current setting of the pivot point, 2nd set the pivot point to "bounding box" and restore the old setting.

Also, I changed the angle to 45° so I can actually see the changes ;) Hope this works for you too. I tested with Blender 4.3.0.

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