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i'm trying to set some keyframe values programatically after its creation, and for now, i didn't find a way to return this keyframe properly, i have to loop through the entire fcurve which is not very efficient...

For example, i would like something like that :

# add a location x keyframe on frame 1
new_key = object.keyframe_insert(
    "location",
    index = 0,
    frame = 1,
    )

set keyframe left handle type


new_key.handle_left_type = "VECTOR"


set keyframe value


new_key.co[1] = "10"

But the keyframe_insert() method only return a Bool for succeeding or not in keyframe creation.

Do you guys know a way to get the keyframe the proper way ? Really stuck here !

Thanks in advance, cheers !

But the keyframe_insert() method only return a Bool for succeeding or not in keyframe creation.

Do you guys know a way to get the keyframe the proper way ? Really stuck here !

Thanks in advance, cheers !

tonton
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    See https://blender.stackexchange.com/questions/64447/how-do-i-add-keyframes-to-a-newly-created-action-with-no-associated-objects ob.keyframe_insert creates action, fcurve etc if need be, whereas you wish to get a reference to the fcurves keyframe_point. Also related https://blender.stackexchange.com/questions/55858/how-to-set-the-easing-of-keyframe-with-python-fast-slow-etc – batFINGER Mar 04 '21 at 12:03
  • thanks for pointing me in the right direction ! the fcurves.keyframe_point.insert() method is definitly the one to go with here ! cheers ! – tonton Mar 04 '21 at 13:17

1 Answers1

2

Found a solution using this related thread https://blender.stackexchange.com/a/32540/31246 and this How do I add keyframes to a newly created action with no associated objects? (thanks @batFinger)

Here is the resulting code where i already have a bunch of variable (frame, value, data_path, array_index, handle_left_type) :

# parent is the object/node_tree ... containing the animation_data
# get_unique_name is(collection, base_name) is a function to ensure name is not used,
# and if so iterate by adding numbers

find fcurve


if parent.animation_data is None:
    parent.animation_data_create()
a_d = parent.animation_data


if a_d.action is None:
    new_name = get_unique_name(bpy.data.actions, parent.name + "Action")
    a_d.action = bpy.data.actions.new(new_name)


fc = a_d.action.fcurves.find(data_path, index = array_index)
if fc is None:
    fc = a_d.action.fcurves.new(data_path, index = array_index, action_group = group_name)


new_key = fc.keyframe_points.insert(
        frame,
        value
        )
new_key.handle_left_type = old_handle_left_type

Cheers !

tonton
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