I want the “bpy.ops.anim.keyframe_insert_menu (type = ‘BUILTIN_KSI_LocRot’)” command run on the selected object when the frame changes. How do I make this script?
Hi mano,
Check out frame_change_pre(post) handlers here http://www.blender.org/documentation/blender_python_api_2_69_1/bpy.app.handlers.html
Thanks for the help batFINGER, but I’m newbie in this thing scripting and I missed:
I tried:
import bpy
from persistent import bpy.app.handlers
if bpy.app.handlers.frame_change_pre:
bpy.ops.anim.keyframe_insert_menu (type = ‘BUILTIN_KSI_LocRot’)
Wrap code in tags like so
[noparse]
blah blah
[/noparse]
Rather than using the operator I used the key_frame_insert.
import bpy
def my_handler(scene):
print("Frame Change", scene.frame_current)
for ob in scene.selected_objects:
l = ob.keyframe_insert("location", group="LocRot", options={'INSERTKEY_NEEDED'})
r = ob.keyframe_insert("rotation", group="LocRot", options={'INSERTKEY_NEEDED'})
# l and r flag the success of the inserts.
bpy.app.handlers.frame_change_pre.append(my_handler)
Thanks, I’m analyzing this code.
I copied and pasted but when “run script” do not know what change it made.
Edit: File “D:\Blender\Pesquisas\alexanderLee_riggedWoman_Wlk 3-2 - Copia.blend\driver_bake.py”, line 6, in my_handlerAttributeError: ‘Scene’ object has no attribute ‘selected_objects’
Thus it works:
import bpy
def my_handler(scene):
print("Frame Change", scene.frame_current)
for ob in bpy.context.selected_objects:
l = ob.keyframe_insert("location", group="LocRot", options={'INSERTKEY_NEEDED'})
r = ob.keyframe_insert("rotation", group="LocRot", options={'INSERTKEY_NEEDED'})
# l and r flag the success of the inserts.
bpy.app.handlers.frame_change_pre.append(my_handler)
Ooops,
import bpy
def my_handler(scene):
if scene is None:
return None
print("Frame Change", scene.frame_current)
selected_objects = [o for o in scene.objects if o.select]
for ob in selected_objects:
l = ob.keyframe_insert("location", group="LocRot")
ob.keyframe_insert("rotation", group="LocRot")
This working better now! =)
Now I just need to know how to disable the code.
Here is code I use for this
def remove_handlers_by_prefix(prefix):
handlers = bpy.app.handlers
my_handlers = [getattr(handlers, name) for name in dir(handlers) if isinstance(getattr(handlers, name), list)]
for h in my_handlers:
fs = [f for f in h if callable(f) and f.__name__.startswith(prefix)]
for f in fs:
h.remove(f)
In speaker tools all handler method names I prefix with SPEAKER_TOOLS_ then I can remove them in one fell swoop with
# get rid of any handlers floating around.
remove_handlers_by_prefix('SPEAKER_TOOLS_')
bpy.app.handlers.load_post.append(SPEAKER_TOOLS_load)
bpy.app.handlers.load_pre.append(SPEAKER_TOOLS_unload)
PS
Noticed the name of the file was driver_bake. Here is a snippet from a bake_driver operator I use.
This way can flip thru the ob.animation_data.drivers collection and bake any bloody data_path, array_index combo that you can turn purple in the UI.
print("BAKING", driver.id_data, driver.data_path, driver.array_index)
while frame <= frame_end:
print("#", end="")
scene.frame_set(frame)
# quick fix try array, then without
try:
driver.id_data.keyframe_insert(driver.data_path,
index=driver.array_index)
except:
driver.id_data.keyframe_insert(driver.data_path)
#print("Error in baking")
finally:
frame = frame + 1
scene.frame_set(scene_frame)
return {'FINISHED'}
Analyzing …
So: I tried but did not know how to use this fragment. I wanted to bake with the “Automatic insertion for Objects and Bones” (red ball in the Time Line). The previous script runs but does not stop.You can pass me this bake_driver operator you use?
I had to do it this way, the problem is that I have to click “run script” every time I turn off or on the red circle in Timeline:
import bpy
def my_handler(scene):
if scene is None:
return None
print("Frame Change", scene.frame_current)
selected_objects = [o for o in scene.objects if o.select]
for ob in selected_objects:
l = ob.keyframe_insert("location", group="LocRot")
r = ob.keyframe_insert("rotation", group="LocRot")
if bpy.context.scene.tool_settings.use_keyframe_insert_auto == True:
bpy.app.handlers.frame_change_pre.append(my_handler)
else:
for i in range(0,len(bpy.app.handlers.frame_change_pre)):
bpy.app.handlers.frame_change_pre.pop(i)
Thanks for the help. 
Here are the few changes required.
import bpy
def main(context):
scene = context.scene
scene_frame = context.scene.frame_current
for ob in scene.objects:
if not hasattr(ob, "animation_data") or ob.animation_data is None:
continue
drivers = [d for d in ob.animation_data.drivers]
for driver in drivers:
print()
print("BAKING", repr(driver.id_data), driver.data_path, driver.array_index)
frame, frame_end = scene.frame_start, scene.frame_end
while frame <= frame_end:
print("#", end="")
scene.frame_set(frame)
# quick fix try array, then without
try:
driver.id_data.keyframe_insert(driver.data_path,
index=driver.array_index)
except:
driver.id_data.keyframe_insert(driver.data_path)
#print("Error in baking")
finally:
frame = frame + 1
print()
scene.frame_set(scene_frame)
return {'FINISHED'}
class SimpleOperator(bpy.types.Operator):
"""Tooltip"""
bl_idname = "object.simple_operator"
bl_label = "Simple Object Operator"
@classmethod
def poll(cls, context):
return context.active_object is not None
def execute(self, context):
return main(context)
def register():
bpy.utils.register_class(SimpleOperator)
def unregister():
bpy.utils.unregister_class(SimpleOperator)
if __name__ == "__main__":
register()
# test call
bpy.ops.object.simple_operator()
btw. popping all handlers could make other addons cease to work if they too rely on a frame_change handler.
Sorry but I’m still really newbie. With your script I can now to bake the drivers? How do I do this? Where is SimpleOperator class?
I followed your tip and did this:
import bpy
def my_handler(scene):
if scene is None:
return None
selected_objects = [o for o in scene.objects if o.select]
if bpy.context.scene.tool_settings.use_keyframe_insert_auto == True:
for ob in selected_objects:
l = ob.keyframe_insert("location", group="LocRot")
r = ob.keyframe_insert("rotation_euler", group="LocRot")
bpy.app.handlers.frame_change_pre.append(my_handler)
Now works perfectly
Edit: It does not work perfectly because it overlaps the previous keyframes