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use rapier2d::prelude::*;
use rapier_testbed2d::Testbed;
// This shows a bug when a cylinder is in contact with a very large
// but very thin cuboid. In this case the EPA returns an incorrect
// contact normal, resulting in the cylinder falling through the floor.
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();
/*
* The ground
*/
let ground_size = 5.0;
let ground_height = 0.1;
let rigid_body = RigidBodyBuilder::fixed().translation(vector![0.0, -ground_height]);
let handle = bodies.insert(rigid_body);
let collider = ColliderBuilder::cuboid(ground_size, ground_height);
colliders.insert_with_parent(collider, handle, &mut bodies);
/*
* A rectangle that only rotate.
*/
let rigid_body = RigidBodyBuilder::dynamic()
.translation(vector![0.0, 3.0])
.lock_translations();
let handle = bodies.insert(rigid_body);
let collider = ColliderBuilder::cuboid(2.0, 0.6);
colliders.insert_with_parent(collider, handle, &mut bodies);
/*
* A tilted capsule that cannot rotate.
*/
let rigid_body = RigidBodyBuilder::dynamic()
.translation(vector![0.0, 5.0])
.rotation(1.0)
.lock_rotations();
let handle = bodies.insert(rigid_body);
let collider = ColliderBuilder::capsule_y(0.6, 0.4);
colliders.insert_with_parent(collider, handle, &mut bodies);
/*
* Set up the testbed.
*/
testbed.set_world(bodies, colliders, impulse_joints, multibody_joints);
testbed.look_at(point![0.0, 0.0], 40.0);
}
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