The initial position and radius of the deformator represents the state of no deformation. The desired deformation effect can then be achieved by editing the center and the radius of the sphere.
All points inside the initial radius will be influenced by the deformator. All points outside the sphere will not be affected by the deformator.
By moving the center point, one can achieve a magnet like effect. All points are moved with the sphere. The higher the distance of the point and the center of the initial sphere the smaller the translation.
To deform a nurbs mesh:
1. Create a nurbs mesh consisting of say 10 x 6 control points
2. Activate the radial deformer tool and specify two points defining the center point and radius attributes for the deformer.
3. Switch to edit mode and drag the center point or the radius handle of the deformer. The target points are deformed accordingly.
Setting the radius attribute to a smaller value generates a gravity like effect. In other words, target points are scaled towards the center point rather than translated with it.
The strength factor can also be controlled by defining a deformation curve through the property window. The default curve is linear. The beginning of the curve represents the maximum distance of influence and the end point corresponds to the zero distance.
The deformator also supports fractal noise deformation effect. The strength and density of the noise effect can be defined through the property window. This option is useful for creating turbulence effects. For example, a star ship can be moved through a noise field.