Store a collection of Keyframes that can be evaluated over time.
| keys | All keys defined in the animation curve. | 
| length | The number of keys in the curve. (Read Only) | 
| postWrapMode | The behaviour of the animation after the last keyframe. | 
| preWrapMode | The behaviour of the animation before the first keyframe. | 
| this[int] | Retrieves the key at index. (Read Only) | 
| AnimationCurve | Creates an animation curve from an arbitrary number of keyframes. | 
| AddKey | Add a new key to the curve. | 
| Evaluate | Evaluate the curve at time. | 
| MoveKey | Removes the keyframe at index and inserts key. | 
| RemoveKey | Removes a key. | 
| SmoothTangents | Smooth the in and out tangents of the keyframe at index. | 
| Constant | Creates a constant "curve" starting at timeStart, ending at timeEnd and with the value value. | 
| EaseInOut | Creates an ease-in and out curve starting at timeStart, valueStart and ending at timeEnd, valueEnd. | 
| Linear | A straight Line starting at timeStart, valueStart and ending at timeEnd, valueEnd. |