I made a simple 3D world, based on 2D squares.
(Each square can have 4 walls, N, E, S or W)
To check if the viewer collides with one of the walls, i make the following steps:
-calculate the point the viewer is heading to (p2, p1 would be the viewers previous position)
-rico = (p2.y - p1.y) / (p2.x - p2.y)
-for each wall in a square
if (wall.orientation = north)
if (p1.x < xt) && ( xt < p2.x) collision;
(for south, east and west the code is mush the same)
This does work in all cases except
-if you walk straight (angle = 0°) on to a wall (i can understand that (div/0))
-in a corner between two walls, you can walk through them
What am i doing wrong?
(If there are thing you want to know, i’ll post the full code)