* Depending on the version of _cmake_  `target_link_libraries()` reports error (Policy CMP0016). Moved `target_link_libraries()` of _CGAL_ just after _jpscore_ has been created.

* Wall repulsive wall was ignored if pedestrian's direction do not intersect walls. That is not good if pedestrians already overlap with walls. Check Overlapping with the wall and if no overlap, then consider the direction checking.

* Code contains lot of `printf`. Cleaning some day.