  How to reproduce realistic motion in simulations has always been a
fundamental problem for pedestrian dynamics, and a critical challenge for
current studies is the natural correlation of the movement choices and the
human behaviours. To advance the study, we deconstruct the two-dimensional
space of pedestrian crowds with a behavioural motion network on basis of
Voronoi diagram and Delaunay diagram, and accordingly formulate a behavioural
model considering both the long-term route choice and the real-time velocity
choice. The comparisons between simulation results and real-world movements
suggest that the behavioural model can not only deal with traditional scenarios
but also be capable of describing well-agreed movements in challenging
conflicting situations. The spatial deconstruction idea provides a geometric
perspective to recognize and reproduce the pedestrian behaviours, and it can
further benefit the understanding and realization of pedestrian dynamics and
even robot navigation.
