RBF Deformer

Enables RBF deformer for input mesh. Input Controls are optional

/**
 * Node that deforms a mesh using radial basis functions.
 * 
 * Opens a viewport for placing RBF control points that
 * drive smooth mesh deformation.
 * 
 * Usage:
 * 1. Connect mesh input
 * 2. Use viewport to place and move control points
 * 3. Output is the deformed mesh
 */