Constraints as a general computational technique allow declaring a set of relationships between entities. A constraint satisfaction system is employed to automatically ensure that the relationships hold under changing conditions. Automated Construction of Virtual Worlds Using Modeling Constraints - Designing and specifying 3D scenes is a tedious, time consuming process that often degenerates into trial and error. We propose a new way to form virtual worlds based on geometric modeling constraints and higher-level modeling abstractions. Cassowary - Incremental constraint solving toolkit, efficiently solves systems of linear equalities, inequalities.
Constraints can be requirements or preferences.
Client code specifies constraints to maintain, and the solver updates constrained variables to have values that satisfy the constraints. Computer Support in the Design of Mechanical Products - Constraint specification and satisfaction in feature based design for manufacturing. November 26 - December 1, Paphos, Cyprus. Final appearance of page comes from negotiation between author and viewer, via solving all the constraints. DeltaBlue Constraint Solver - Efficient, incremental local propagation constraint solver.