Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
This script will take keyframes of a selected range, on a selected object and scale them according to a value the user enters. For example, to Reverse an animation you would enter a Scale factor of -1 and then select the start and end frames that you wish to reverse. To Slow Down the animation you could enter a scale factor of 2 and slow the animation down to twice it's original speed.
The User Pivot setting is to determine where you want the scale 'pivot' point to be. In other words, do you want the frames to scale forward from keyframe 5, or do you want them to scale back from 20... or out both directions from 12.5, and so on.It's basically the center point of the scale operation.
The Auto Pivot setting makes the pivot exactly half way between the start and end frames entered into the scaler-izer dialog. Use this for reversing an animation proportionally.