Deformable models using displacement constraints

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 time step 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 the hierarchical representation of the object. Animators can set the distribution of forces at each level, thus controlling an object's local and global behaviour.

Name thesis:degree_name

Master of Science - MSc

Level thesis:degree_level

master's

Discipline thesis:degree_discipline

Computer Science

Grantor dc:publisher

University of British Columbia

Year dc:date

1993

Author dc:creator

• Palazzi, Larry

Statement dc:rights

• For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.

Language dc:language

eng

Handle dc:identifier

http://hdl.handle.net/2429/1654

OAI identifier oai:identifier

oai:circle.library.ubc.ca:2429/1654