Graphics Reference
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egory, albeit with inequality constraints that complicate the minimization
considerably.
Turning to deformable objects, the energy minimization framework fal-
ters. Strong coupling in this context means combining an implicit time step
of the internal dynamics of the deformable object with the pressure solve;
however, implicitly advancing elastic forces (involving potential energy) ap-
parently cannot be interpreted as a minimization of energy with respect to
forces. At the time of writing, within graphics only the work of Chentanez
et al. [Chentanez et al. 06] has tackled this problem, discretizing the fluid
on an unstructured tetrahedral mesh that conforms to the boundary mesh
of the deformable object; so far the generalization to regular grids with
volume fractions hasn't been made. We thus end the chapter here.
