Dynamic axial curve -pair based deformation

Abstract

Deformation of 3D objects plays an important role in computer graphics, simulation and computer-aided design. Using a deformation tool, a simple geometric model can be deformed to take useful and intuitive shapes. The axial deformation technique allows a 3D object to be deformed by adjusting the shape of an axial curve. However, due to lack of control on the local coordinate frame, unexpected twist may result. The axial curve-pair based deformation technique provides a scheme for controlling the local coordinate frame intuitively. Nevertheless, achieving a physically viable deformation relies very much on the experience and skill of the user in manipulating the shape of the curve-pair. The dynamic axial curve-pair based deformation technique enhances the system by incorporating a special mass-spring model for the 1-dimensional curve-pair structure. Movement of the point masses of the mass spring system deforms the embedded curve-pair, which in turn deforms the associated geometric shape. The proposed technique is particularly useful for the design and animation of soft objects such as animals and characters. © 2008 Springer-Verlag Berlin Heidelberg.