Main Registration Algorithm

This algorithm is implemented in the files vfluid/vfluid.(cc|hh).

Using the time step parameter $d \in [d_{\min},d_{\max}]$ an adaptive control of the integration time step is achieved. $[d_{\min},d_{\max}]$ should be chosen to permit a smooth but steady deformation, and $\Delta d \ll d_{\max} - d_{\min}$ is used to re-adjust $d$ during the registration.