use na::Point3;
use rapier3d::dynamics::{JointSet, RigidBodyBuilder, RigidBodySet};
use rapier3d::geometry::{ColliderBuilder, ColliderSet};
use rapier_testbed3d::Testbed;

pub fn init_world(testbed: &mut Testbed) {
    /*
     * World
     */
    let mut bodies = RigidBodySet::new();
    let mut colliders = ColliderSet::new();
    let joints = JointSet::new();

    let rb = RigidBodyBuilder::new_dynamic().build();
    let co = ColliderBuilder::cuboid(0.5, 0.5, 0.5).build();
    let h = bodies.insert(rb);
    colliders.insert(co, h, &mut bodies);

    /*
     * Set up the testbed.
     */
    testbed.set_world(bodies, colliders, joints);
    testbed.look_at(Point3::new(100.0, 100.0, 100.0), Point3::origin());
}

fn main() {
    let testbed = Testbed::from_builders(0, vec![("Balls", init_world)]);
    testbed.run()
}