| curve | Curve to query. |
| index | キーフレームのインデックス |
TangentMode Returns the tangent mode.
Retrieves the right tangent mode of the keyframe at a specific index.
The Curve Editor uses the keyframe tangent mode to automatically generate tangents.
Additional resources: AnimationUtility.GetKeyLeftTangentMode, AnimationUtility.GetKeyBroken.