Larry Palazzi
Deformable Models Using Displacement Constraints
| Degree: | M.Sc. |
| Type: | thesis |
| Year: | 1993 |
| Supervisor: | David R. Forsey |
| Electronic: |
![[PDF]](/labs/imager/th/icons/pdf.gif){kind=icon} , 466286 bytes |
| Hardcopy: | 73 pages |
Abstract
This thesis explores a variation of a technique, called "displacement constraints" [19], used for creating and animating deformable objects. It is a constraint-based technique that uncouples the constraint forces from the external forces acting on an object, and solves a system of geometric constraints at each timestep using an iterative technique. Displacement constraints does not attempt to model real physics, but is a simple, efficient technique that offers interactive speeds for the modeling and animation of deformable objects.The inability to respond globally to an external force is an inherent property of many discrete/nodal formulations. A global response is sometimes only obtained through the propagation of localized forces over multiple timesteps. Energy minimization techniques may also achieve certain global effects, but at a higher computational cost. We introduce a multilevel approach to force distribution to improve the global response of a deformable object. External forces acting on an object are propagated through the different levels of a hierarchical representation of the object. Animators can set the distribution of forces at each level, thus controlling an object's local and global behaviour.
@MastersThesis{Palazzi1993,
author = {Larry Palazzi, M.Sc},
title = {Deformable Models Using Displacement Constraints},
school = {UBC},
year = {1993},
supervisor = {David R. Forsey},
}