Is there a way of detecting collision of Sprites in the bevy game engine?

Question

Currently im using the Position of two objects (comets and the ship) to detect if they collide.

fn collision_detection(
    comets: Query<&Transform, With<Comet>>,
    mut ships: Query<(&Transform, &mut ShipStatus), With<Ship>>,
) {
    for comet in comets.iter() {
        for (ship, mut status) in ships.iter_mut() {
            if comet.translation.x < ship.translation.x + 80.0 && comet.translation.y < ship.translation.y + 80.0
            && comet.translation.x > ship.translation.x - 80.0 && comet.translation.y > ship.translation.y - 80.0 {
                status.dead = true;
            }
        }
    }
}

But there has to be a better way of doing this.

Answer 1

Bevy doesn't have a complete collision system currently. Unless it has been expanded in the few months since the introductory page was created:

Physics

Many games require collision detection and physics. I'm planning on building a plug-able physics interface with nphysics / ncollide as the first backend.

Fortunately, this simple example is actually provided by bevy::sprite::collide_aabb::collide which does simple AABB collision detection.

use bevy::sprite::collide_aabb::collide;

let ship_size = Vec2::new(80.0, 80.0);
let comet_size = Vec2::new(0.0, 0.0);
for comet in comets.iter() {
    for (ship, mut status) in ships.iter_mut() {
        if collide(ship.translation, ship_size, comet.translation, comet_size).is_some() {
            status.dead = true;
        }
    }
}