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I am getting an error when trying to center the cursor in a python script

import bpy

bpy.ops.import_scene.obj(filepath=objFilePath, axis_up='Y')

bpy.ops.object.select_by_type(type='MESH')

bpy.ops.object.origin_set(type='ORIGIN_GEOMETRY')
view3d = bpy.context.screen.areas['VIEW_3D'].spaces[0];
view3d.pivot_point = 'CURSOR'
view3d.cursor_location = (0.0,0.0,0.0)  
USER = os.environ['USER'];

bpy.ops.export_scene.fbx(filepath="/Users/"+USER+"/house.fbx", path_mode='RELATIVE', object_types={'MESH'})

Error:

Traceback (most recent call last):
  File "<blender_console>", line 1, in <module>
  File "/private/var/folders/48/ptx7wqz138x4_shgs5nk6szm0000gn/T/AppTranslocation/DEB386B3-C3FC-4FAB-B7A2-0954C07B91CF/d/blender.app/Contents/MacOS/../Resources/2.78/scripts/modules/bpy/ops.py", line 189, in __call__
ret = op_call(self.idname_py(), None, kw)
RuntimeError: Operator bpy.ops.view3d.snap_cursor_to_center.poll() failed, context is incorrect

I am trying to center the origin of my model in batch mode of blender.

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  • $\begingroup$ What is the error? $\endgroup$
    – satishgoda
    Jun 14, 2017 at 22:35
  • $\begingroup$ I added it above $\endgroup$
    – luii
    Jun 14, 2017 at 22:37
  • $\begingroup$ If you are running the script from the script editor or Python console, then this error makes sense. The bpy.ops.view3d.snap operators must be run with view3d being active. $\endgroup$
    – satishgoda
    Jun 14, 2017 at 22:40
  • $\begingroup$ Does that mean I should just add this line bpy.ops.view3d.snap_cursor_to_active()? $\endgroup$
    – luii
    Jun 14, 2017 at 22:44
  • $\begingroup$ I have added an answer. $\endgroup$
    – satishgoda
    Jun 14, 2017 at 23:03

2 Answers 2

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Every operator requires a proper context to run in. Since you mentioned that you are running the script in batch mode and accessing a view3d operator, you must provide the exact context to the operator

import bpy
# in this case the area at index 4 happens to be view3d
view3d = bpy.context.screen.areas[4]
context_override = {'window': bpy.context.window, 
                    'screen': bpy.context.screen, 
                    'area' : view3d}
bpy.ops.view3d.snap_cursor_to_center(context_override)

By doing this, I am able to snap the cursor by running the script from the Python console. Also, you do not need the call to poll() since you are providing the explicit context.

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  • $\begingroup$ I updated above $\endgroup$
    – luii
    Jun 16, 2017 at 20:04
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You can assign a Vector((0.0, 0.0, 0.0)) or just a float array to Cursor.location:

bpy.context.scene.cursor.location = (0.0, 0.0, 0.0) # Blender 2.8x
bpy.context.scene.cursor_location = (0.0, 0.0, 0.0) # Blender 2.7x
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    $\begingroup$ Please refrain from posting extremely short answers including nothing but code. Also, embed your code with the code tags so it looks like a python code snippet, you can do all this by editing your existing answer and look for the { } button. This makes the code easier to see and follow, and shows a different color for the type of value. Lastly, please add a explanation for why and how your answer would answer a question. $\endgroup$
    – FreemoX
    Aug 2, 2017 at 16:26

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