Contents
How does 2D collision detection work?
One of the simpler forms of collision detection is between two rectangles that are axis aligned — meaning no rotation. The algorithm works by ensuring there is no gap between any of the 4 sides of the rectangles. Any gap means a collision does not exist.
How do you check for bounding box collisions?
The way to detect collisions is to compare the player’s bounding box with each enemy’s bounding box. If a collision is detected, the enemy that collides with the player‟s plane is removed from the screen, and will reappear on the next frame.
How do I find AABB?
To make an AABB for one of the objects, you draw a rectangle around the object, making your lines parallel to the grid lines on the paper. If you have the AABB for two objects, you can do some pretty simple math to see if those AABBs overlap.
What does AABB mean?
American Association of Blood Banks
Since its inception in 1947, the association has grown to represent much more than the “American Association of Blood Banks.” The association instituted a name change in 2005 to more accurately reflect its interests and diverse membership and is now known only by its initialism: AABB.
How does collision detection work in 2D games?
Collision detection for these types of games is simple. You can simply maintain the game world in a two-dimensional array and check if the player’s desired movement will cause them to end up in a tile, and if so, prevent the movement.
What do you need to know about collision detection?
To detect collisions in a Gameobject we need a Collider 2D, with the right type according to our needs. To allow physics 2D to affect a Gameobject we need a RigidBody 2D. Keep in mind all the rules we discussed before configuring the game properly and you will avoid unwanted behaviors.
Do you need quadtree for 2D collision detection?
With the quadtree in hand, we are almost ready to implement collision detection in our game. There is still one more thing to do before we implement 2D collision detection.
Do you need rigidbody 2D for collision detection?
You don’t really need to set the Rigidbody 2D for static objects , just the collider 2D is necessary to detect collisions, but if a static object needs to be moved or reconfigured at run time, it is faster to do so when it has its own Rigidbody 2D and this will be our body!