Autodesk 663B1-05A111-1001 User Guide - Page 264

12 | Basics Menus Reference > Modify > Transformation Tools > Proportional Modification Tool Modification Falloff: Power Using the Proportional Modification Tool, you can set the degree to any value between +5 and -5 and the falloff is non-linear (it forms a logistic curve). However, if you set the degree to 1, the falloff is linear again. Distance Cutoff Objects further away than this value are ignored. The distance is measured in 3D from the manipulator handle. For Parametric (NURBS) modification type, you set Distance Cutoff U and Distance Cutoff V. Degree Specifies the degree of effect in the U and V directions. A value of 0 applies the transformation equally over the entire region. A positive value decreases the effect of the transformation for objects further away from the manipulator handle; the greater the degree, the greater this dampening effect. If Degree is negative, the effect of the transformation is increased for objects further away from the manipulator handle. Distance Based On The distance from the manipulator handle to the object directly influences the modification factor. The distance is computed along the selected axes only. Modification Falloff: Script This method uses a MEL script to determine the falloff. With the appropriate parameters set, you can select the Script option and type a command for the settings in the User Defined Script box to save the current parameter settings without actually invoking the function. If you want to use these settings again later, you can retrieve the tool's script from the Reference Editor. User Defined Script The script should return a modification factor. The inputs to the script are "float" numbers. The first three represent the position of the manipulator handle. The second three represent the position of the point manipulated. For example, the points for which this script returns 1 moves with the manipulator handle. The points for which this script returns 0.5 move half as fast as the manipulator handle. Modification Falloff: Curve This option uses an animation curve to create the falloff. An animation curve profile can be used to produce a modification factor. Basics 264