The Box2.getSize() method returns a Vector2 representing the width and height of a box.
box.getSize(out: Vector2): Vector2
out (optional): a Vector2 to store the result in. If not provided, a new Vector2 will be created.Vector2 object representing the width and height of the box.const box = new THREE.Box2(new THREE.Vector2(-1, -1), new THREE.Vector2(1, 1));
const size = box.getSize();
// size.x === 2, size.y === 2
const myVector = new THREE.Vector2();
box.getSize(myVector);
// myVector.x === 2, myVector.y === 2
In this example, we create a new Box2 object representing a square centered at the origin with side length 2. We then use the getSize() method to retrieve its dimensions.
The Box2 object represents a 2D bounding box. The getSize() method computes the size of this box by subtracting the minimum position from the maximum position along each axis. The resulting Vector2 represents the width and height of the box.