Model for diverse parameters k and h close towards the optimal point with fixed velocity = 1.7 m/s and delay = 1.25 ms. C: Identical as B but with varying velocity v and delay d with fixed k = 700 and h = 0.12. In panels B and C the X marks the parameter that was chosen for the corresponding other panel. doi:10.1371/journal.pcbi.1005025.gdipole has six degrees of freedom defining its position, ori