Audrey St. John

Geometric constraint systems
A geometric constraint system is composed of atomic elements
with geometric constraints among them. Constraints may be pairwise
or kary.
Examples
 Atomic elements  Constraints 
Barandjoint  Universal joints  Fixedlength bars between pairs of joints 
Bodyandbar  Rigid bodies  Fixedlength bars between pairs of bodies; bars
are rigidly attached to bodies by universal joints 
Bodyandhinge  Rigid bodies  Fixedlength hinge joints between pairs of bodies;
hinges impose both a distance and angle constraint, allowing one degree of freedom (rotation
around the hinge axis) 
Under construction  more definitions and examples coming soon!
