Animation validation by spacetime constraints paradigm for realistic simulation representation

Numerical computation of 4-D physical system “real” behavior at high granularity level, usually requires supercomputing machine computational power and is addressed as Scientific or Physical Simulation. Often, in order to decrease CPU-intensive computational load, Physical Simulation Representation (PSR) is substituted by sophisticated realistic virtual model animation to create Realistic high-fidelity Simulation Representation (RSR). In that case Realistic Simulators (RS) rather than Physical Simulators (PS) are used. Current techniques for Realistic Simulator design are either local in nature: they all use some kind of perturbation analysis to refine an initial trajectory, or they use a global search approach, encoding trajectories as behaviors. In the latter case, in general, Realistic Simulators (RS) employ forward dynamics and the deformations are produced kinematically by any model’s stimulus-response algorithm, with fixed parameters for the duration of the trial behavior. Main traditional and advanced virtual model computer animation techniques for realistic simulation are critically revised to extract key concepts to develop new methods for automatic validating the realistic motion of animated models.