Animation: Merge Push/Relax Rest Pose operators #108309

This patch merges the two operators Push Pose from Rest Pose and Relax Pose from Rest Pose into one new operator Blend Pose to Rest Pose

The functionality of Relax Pose from Rest Pose is identical with Blend Pose to Rest Pose
while the functionality from Push Pose from Rest Pose is in the negative range of Blend Pose to Rest Pose that can be reached by enabling overshoot.

This is a breaking change so ideal for 4.0

This patch merges the two operators `Push Pose from Rest Pose` and `Relax Pose from Rest Pose` into one new operator `Blend Pose to Rest Pose` The functionality of `Relax Pose from Rest Pose` is identical with `Blend Pose to Rest Pose` while the functionality from `Push Pose from Rest Pose` is in the negative range of `Blend Pose to Rest Pose` that can be reached by enabling overshoot. This is a breaking change so ideal for 4.0

Good idea to merge these two, as they're two sides of the same coin. A few remarks:

The initial value is now at 50%, causing an immediate jump in the pose. I think 0% would be a better start, so that you can gradually dial in the desired amount.
IMO it would be better to have the 'negative' range (i.e. "push from rest pose") available immediately, without having to use the E key. Even though it's technically extrapolation, it also makes the feature less accessible.

From the change in naming, the extra key required to get the 'push from' behaviour, the change in name and description, those all appear to be hiding the 'push from' side of things. These used to be two equal operators (in terms of visibility, directness, etc.), and I think it's good to rethink some of the details to make sure that it doesn't appear like one of them got lost somehow.

Good idea to merge these two, as they're two sides of the same coin. A few remarks: - The initial value is now at 50%, causing an immediate jump in the pose. I think 0% would be a better start, so that you can gradually dial in the desired amount. - IMO it would be better to have the 'negative' range (i.e. "push from rest pose") available immediately, without having to use the `E` key. Even though it's technically extrapolation, it also makes the feature less accessible. From the change in naming, the extra key required to get the 'push from' behaviour, the change in name and description, those all appear to be hiding the 'push from' side of things. These used to be two equal operators (in terms of visibility, directness, etc.), and I think it's good to rethink some of the details to make sure that it doesn't appear like one of them got lost somehow.

I've implemented the changes, except for the change to the operator name
This needs to be discussed in the meeting, but the name "Blend Pose from Rest Pose" is confusing to me.
Like it's not clear where it is going.

That's also the reason why I hid away the push functionality behind the overshoot at first. As an animator it is hard to predict where that is going, so it will always be less important than blending to the rest pose. But I see from a consistency point of view how it should stay the same.

I've implemented the changes, except for the change to the operator name This needs to be discussed in the meeting, but the name "Blend Pose from Rest Pose" is confusing to me. Like it's not clear where it is going. That's also the reason why I hid away the push functionality behind the overshoot at first. As an animator it is hard to predict where that is going, so it will always be less important than blending to the rest pose. But I see from a consistency point of view how it should stay the same.

 @ -3739,3 +3737,4 @@
         layout.operator("pose.relax")
         layout.operator("pose.breakdown")
         layout.operator("pose.blend_to_neighbor")
         layout.operator("pose.blend_to_rest")

 @ -1658,1 +1585,3 @@
   ot->description = "Make the current pose more similar to the rest pose";
   ot->name = "Blend Pose to Rest Pose";
   ot->idname = "POSE_OT_blend_to_rest";
   ot->description = "Blend the current pose to the rest pose";

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Animation: Merge Push/Relax Rest Pose operators #108309

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