Box2.intersect()

The Box2.intersect() function is used in Three.js to check if two 2D boxes intersect each other (i.e., if they overlap). This function takes two instances of the Three.js Box2 class as input parameters and returns a Boolean value indicating whether the two boxes intersect or not.

Box2.intersect(box1, box2)

Parameters

• box1: An instance of the Box2 class representing the first box.
• box2: An instance of the Box2 class representing the second box.

Return Value

This function returns a Boolean value:

• true: If the two boxes intersect.
• false: If the two boxes do not intersect.

How it Works

The Box2.intersect() function determines if two boxes intersect by checking if the areas of the boxes overlap. In other words, if the two boxes share any common space, then they intersect.

The Box2.intersect() function compares the maximum and minimum values of the X and Y coordinates of the two boxes to make this determination. If any of these maximum or minimum values overlap, then the two boxes intersect.

Example

var box1 = new THREE.Box2(new THREE.Vector2(0, 0), new THREE.Vector2(10, 10));
var box2 = new THREE.Box2(new THREE.Vector2(5, 5), new THREE.Vector2(15, 15));

if (box1.intersectsBox(box2)) {
    console.log("The two boxes intersect.");
} else {
    console.log("The two boxes do not intersect.");
}

In this example, we create two 2D boxes: box1 with coordinates (0, 0) and (10, 10), and box2 with coordinates (5, 5) and (15, 15). Since these two boxes intersect, the Box2.intersect() function would return true and print "The two boxes intersect." to the console.