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use rapier2d::prelude::*;
use rapier_testbed2d::Testbed;
pub fn init_world(testbed: &mut Testbed) {
/*
* World
*/
let mut bodies = RigidBodySet::new();
let mut colliders = ColliderSet::new();
let impulse_joints = ImpulseJointSet::new();
let multibody_joints = MultibodyJointSet::new();
let radius = 0.5;
let grid_count = 25;
let friction = 0.6;
let max_count = grid_count * grid_count;
/*
* Ground
*/
let collider =
ColliderBuilder::capsule_from_endpoints(point![-10.5, 0.0], point![10.5, 0.0], radius)
.friction(friction);
colliders.insert(collider);
let collider =
ColliderBuilder::capsule_from_endpoints(point![-10.5, 0.0], point![-10.5, 20.5], radius)
.friction(friction);
colliders.insert(collider);
let collider =
ColliderBuilder::capsule_from_endpoints(point![10.5, 0.0], point![10.5, 20.5], radius)
.friction(friction);
colliders.insert(collider);
let collider =
ColliderBuilder::capsule_from_endpoints(point![-10.5, 20.5], point![10.5, 20.5], radius)
.friction(friction);
colliders.insert(collider);
/*
* Create the spheres
*/
let mut row;
let mut count = 0;
let mut column = 0;
while count < max_count {
row = 0;
for _ in 0..grid_count {
let x = -8.75 + column as f32 * 18.0 / (grid_count as f32);
let y = 1.5 + row as f32 * 18.0 / (grid_count as f32);
let body = RigidBodyBuilder::dynamic()
.translation(vector![x, y])
.gravity_scale(0.0);
let body_handle = bodies.insert(body);
let ball = ColliderBuilder::ball(radius).friction(friction);
colliders.insert_with_parent(ball, body_handle, &mut bodies);
count += 1;
row += 1;
}
column += 1;
}
/*
* Set up the testbed.
*/
testbed.set_world(bodies, colliders, impulse_joints, multibody_joints);
testbed.look_at(point![0.0, 2.5], 20.0);
}
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