I have a puzzler that is leaving me stumped. The following is a snipet of code I am writing in Blender 2.63.13-r48794 with Python:

Code:

# Search comments for tyre flags             if tyre_string in comments[ (each_element - 1) ]:                 print(comments[ (each_element - 1) ] + comments[ each_element ] + "\n")                 ascii_num += 1                                 # Set width of tyre                 depth = position_m[ (each_element) ] - position_m[ (each_element - 1) ]                                 # Generate inner diameter cylinder for boolean difference                 bpy.ops.mesh.primitive_cyli:?: nder_add(vertices=32, radius=Rad, depth=(depth + 1.0),                  end_fill_type='NGON', view_align=False, enter_editmode=False,                  location=(0, ((position_m[ each_element ] + position_m[each_element - 1])/2.0), 0),                  rotation=((pi/2),0,0), layers=(True, False, False, False, False, False, False, False,                  False, False, False, False, False, False, False, False, False, False, False, False))                                 # Assign active object to a variable for later identification                 cyl1 = bpy.context.active_object                 cyl1_name = bpy.context.active_object.name                                 # Diagnostic print to console                 print(cyl1)                                 # Generate outer diameter cylinder for boolean difference                 bpy.ops.mesh.primitive_cylinder_add(vertices=32, radius=(Rad + (Rad * 0.50                 )),                  depth=(depth), end_fill_type='NGON', view_align=False, enter_editmode=False,                  location=(0, ((position_m[ each_element ] + position_m[ (each_element - 1) ])/2.0), 0),                  rotation=((pi/2.0),0,0), layers=(True, False, False, False, False, False, False, False,                  False, False, False, False, False, False, False, False, False, False, False, False))                                 # Assign active object to a variable for later identification                 cyl2 = bpy.context.active_object                                 # Diagnostic print                 print(cyl2)                                 # Apply material to outer tyre                 bpy.context.object.data.materials.append(tyre_mat)                                 # Conduct boolean difference to generate tyre                 bpy.ops.object.select_all(action='DESELECT')                 # Set active object to outer cylinder                 bpy.context.scene.objects.active=cyl2                 # Create modifier                 bpy.ops.object.modifier_add(type='BOOLEAN')                 # Select modifier object to inner diameter cylinder                 cyl2.modifiers[0].object = cyl1                 # Set operation                 cyl2.modifiers[0].operation = 'DIFFERENCE'                 # Conduct boolean                 bpy.ops.object.modifier_apply(apply_as='DATA', modifier=cyl2.modifiers[0].name)                                 # Remove inner diameter cylinder after boolean                 bpy.ops.object.select_all(action='DESELECT')                 # Select inner diameter cylinder as active                 bpy.context.scene.objects.active=cyl1                                 # Diagnostic information for console                 temp=bpy.context.active_object.name                 print("Active object is: " + temp)                                 # Delete active object                 bpy.ops.object.delete(use_global=True)                             else:                 print ('Tyre ID not found at %i \n' % (each_element))

This code builds a piece of machinery from data in a CSV file. The "tyres" are constructed from a boolean difference of two cylinders. The goal is to create an automated script to generate this machinery and its animation without user intervention. The user starts the tool from the panel, selects their input file, and Blender does the rest. My problem is that the object deletion is not working within the script itself.


I can delete the inner cylinder within the interface in the 3D View context. I can assign the inner cylinder to variable in the console, make it active, and then run the bpy.ops.object.delete(use_global=True) and the object is deleted. In the script, however, I cannot seem to get it to work. I receive no errors on the console...the boolean happens correctly, but the inner cylinders still exist.


How may I delete these inner cylinders from within the python script? Am I calling the wrong delete operation? What additional information may you all need from me to look into this?

Thanks,
_________________
-- Techmoose007
"Freedom to create is truly living free."

you deselect everything, then you make the inner cylinder active:

bpy.ops.object.select_all(action='DESELECT')
bpy.context.scene.objects.active=cyl1

but you don't select it!

there is a difference between selected and active object, operators mostly require a selection

so you should select cyl1 rather than making it active object:

bpy.ops.object.select_all(action='DESELECT')
cyl.select = True
# delete
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I'm sitting, waiting, wishing, building Blender in superstition...

I found a way to get the results I want, but I am not sure this is an acceptable method.

After the delete operation:

Code:

bpy.ops.object.delete(use_global=True)

I unlinked the objects from the scene:

Code:

bpy.context.scene.objects.unlink(cyl1)

I was under the assumption that the use_global flag on the delete was to remove the object from all scenes AND unlink...but I can see why that may not be the actual behavior...
_________________
-- Techmoose007
"Freedom to create is truly living free."

CoDEmanX wrote:

you deselect everything, then you make the inner cylinder active: there is a difference between selected and active object, operators mostly require a selection so you should select cyl1 rather than making it active object: bpy.ops.object.select_all(action='DESELECT') cyl.select = True # delete

Thanks...I was not aware the mouse actions in 3D view selected and made the object active upon click... I like this approach more than the unlink I did earlier.
_________________
-- Techmoose007
"Freedom to create is truly living free."