- rectangle const *current,
- jumpnrun_level const *level,
- jumpnrun_tile_range const *visible_tiles,
- vec2d *inertia,
- bool *touching_ground);
+ jumpnrun_moveable *thing,
+ jumpnrun_level const *level,
+ jumpnrun_tile_range const *visible_tiles,
+ vec2d *inertia_mod);