By this project convention, the line extend will start from p1 and
end at p2, but not including p2 [p1, p2). Thus, existing tests are
testing a zero-length line, which should assert no collision.
Add test to properly test AABB edge collision with a line
Also update existing collision function to account for this
Changelog:
- Figure out why the previous AABB behaviour was correct: continuum
[0, 5) does not collide with [5, 10)
For tile check however, need to subtract one to avoid extra tile
check. Exception is the tile collision
En Yi