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use na::Point2;
use rapier2d::dynamics::{BodyStatus, JointSet, RigidBodyBuilder, RigidBodySet};
use rapier2d::geometry::{ColliderBuilder, ColliderSet};
use rapier_testbed2d::Testbed;
pub fn init_world(testbed: &mut Testbed) {
/*
* World
*/
let mut bodies = RigidBodySet::new();
let mut colliders = ColliderSet::new();
let joints = JointSet::new();
/*
* Ground
*/
let _ground_size = 25.0;
/*
let ground_shape = ShapeHandle::new(Cuboid::new(Vector2::new(ground_size, 1.0)));
let ground_handle = bodies.insert(Ground::new());
let co = ColliderDesc::new(ground_shape)
.translation(-Vector2::y())
.build(BodyPartHandle(ground_handle, 0));
colliders.insert(co);
*/
/*
* Create the balls
*/
let num = 50;
let rad = 1.0;
let shiftx = rad * 2.5;
let shifty = rad * 2.0;
let centerx = shiftx * (num as f32) / 2.0;
let centery = shifty / 2.0;
for i in 0..num {
for j in 0usize..num * 5 {
let x = i as f32 * shiftx - centerx;
let y = j as f32 * shifty + centery;
let status = if j == 0 {
BodyStatus::Static
} else {
BodyStatus::Dynamic
};
// Build the rigid body.
let rigid_body = RigidBodyBuilder::new(status).translation(x, y).build();
let handle = bodies.insert(rigid_body);
let collider = ColliderBuilder::ball(rad).density(1.0).build();
colliders.insert(collider, handle, &mut bodies);
}
}
/*
* Set up the testbed.
*/
testbed.set_world(bodies, colliders, joints);
testbed.look_at(Point2::new(0.0, 2.5), 5.0);
}
fn main() {
let testbed = Testbed::from_builders(0, vec![("Balls", init_world)]);
testbed.run()
}
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