What are the conditions for collision detection in AABB?
When using AABB collision detection, there are four conditions that must be true in order to say a collision has occurred. Given Bounding Box [A] and Bounding Box [B], these conditions are The left edge x-position of [A] must be less than the right edge x-position of [B].
Is there a third party collision detection API?
Collision detection is an area of game development that scares most into using third party physics APIs due to its seemingly vertically-steep learning curve. Most programmers understand the axis-aligned bounding box (AABB) algorithm but have trouble transitioning to the more difficult algorithms such as SAT and GJK.
How to detect collision between two AaBb rectangles?
An example showing how to detect collision between two AABB (Axis-Aligned Bounding Box) in 2D (uses HTML5/JS). Two rectangles that are [XY] axis aligned do not collide if they are separated along an axis. If they overlap on both axes then they collide.
Which is the best algorithm for 3D collision detection?
Followup articles will cover implementations in specific 3D libraries. As with 2D collision detection, axis-aligned bounding boxes (AABB) are the quickest algorithm to determine whether the two game entities are overlapping or not.
Which is an example of an AABB problem?
AABB has a major fundamental problem that may not be visible at first. Take these 3 examples: Example 1: A normal AABB collision. The blue box is where the box is at the beginning of the frame. The green box is where the box is expected to be by the end of the frame. The aqua box shows where AABB will place the box after collision.
How does the if statement work in AABB?
The if statement checks to see if there was a collision or not. If the collision time was not within 0 and 1, then obviously there was no collision during this frame. Also, the time when the collision first entered should never be after when it exited out the other side. This is checked, and if it failed, then we assume that there was no collision.
Where does the response box go in AABB?
As you can see, AABB has placed the response box on the opposite side of the block. Logically, this makes no sense as it has magically passed through the object. Example 3 shows a destination that doesn’t collide with the object. AABB will assume that there was no collision and the moving box will move through it like there was no collision at all.