How are collisions handled in LibGDX?

Question

Android

Hello.
There is an idea to create a 2D toy for one organization.
Can you please tell me how collisions are handled in LibGDX? What classes are used to check for collisions?
For example, I have rectangular random objects scattered all over the map, and I need to find out which of the objects intersect, while rotation of the objects is possible ...
Thank you.

Answer 1

1. If the game does not use physical. Box2D engine, then the collision is determined by simple x, y checks of the two objects. Those. a loop is built:
for(int i=0; i second_object.x && first_object.x < second_object.x + second_object.width && firs_object.y + first_object.height > second_object.y && first_object.y < second_object.y + second_object. height)
collisia = true;
}
}
But this method is not always suitable, and if you are creating a platformer, then most often it is better to use the Box2d engine. It is in your cases with rotation that it is better to use it.
2. Box2d - suvitruf.ru/2012/12/22/2764
habrahabr.ru/post/162079
(like from one author)

Answer 2

libGDX has a built-in 2D physics engine, Box2D. He just the same and can handle collisions. Google how to work with it.

Answer 3

The written function for checking collisions of a rectangle with a rectangle helped me ... Here:
// The function for checking for collisions
function checkForCollision(obj1, obj2){
if ((obj1.x < obj2.x + obj2.width) && (obj2.x < obj1 .x + obj1.width) && (obj1.y < obj2.y + obj2.height) && (obj2.y < obj1.y + obj1.height)) return true;
return false;
}