Physics - How do you adjust after an AABB collision?
When a player collides with a block, I move them based on the smallest axis change, which makes sense.
However, this gets confusing when many blocks interact with each other.
- Black Square - Player, Moving
- Red/Blue Squares - Blocks, Static
From this example, the player obviously should move up, but the boxes individually have different viewpoints
- The blue box is collided more on the Y axis, so the black box should move left. You can see this easier if you pretend the red box doesn't exist
- The red box is collided more on the X axis, so the black box should move up
How do I know which box is "correct"?
The solution is to find the closest blocks for X and Y
In this situation, the Red block is closer on the X axis, so it should be used to fix the Y axis
Also, to prevent a block from moving the player to a corner, add a grace buffer. In the image below, the purple and green areas are slightly smaller then the size of the player.
If a block is the closest on one of the axes, and it is in that area, then it should be used for collisions