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use na::{Point3, Vector3};
use rapier3d::dynamics::{JointSet, RigidBodyBuilder, RigidBodySet};
use rapier3d::geometry::{ColliderBuilder, ColliderSet};
use rapier_testbed3d::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 joints = JointSet::new();
/*
* The ground
*/
let ground_size = 5.0;
let ground_height = 0.1;
let rigid_body = RigidBodyBuilder::new_static()
.translation(0.0, -ground_height, 0.0)
.build();
let handle = bodies.insert(rigid_body);
let collider = ColliderBuilder::cuboid(ground_size, ground_height, ground_size).build();
colliders.insert(collider, handle, &mut bodies);
/*
* A rectangle that only rotates along the `x` axis.
*/
let rigid_body = RigidBodyBuilder::new_dynamic()
.translation(0.0, 3.0, 0.0)
.lock_translations()
.principal_inertia(Vector3::zeros(), Vector3::new(true, false, false))
.build();
let handle = bodies.insert(rigid_body);
let collider = ColliderBuilder::cuboid(0.2, 0.6, 2.0).build();
colliders.insert(collider, handle, &mut bodies);
/*
* A capsule that cannot rotate.
* We initialize it in a tilted position to demonstrate the
* fact that is cannot rotate.
*/
let rigid_body = RigidBodyBuilder::new_dynamic()
.translation(0.0, 5.0, 0.0)
.rotation(Vector3::x() * 1.0)
.lock_rotations()
.build();
let handle = bodies.insert(rigid_body);
let collider = ColliderBuilder::capsule_y(0.6, 0.4).build();
colliders.insert(collider, handle, &mut bodies);
/*
* Set up the testbed.
*/
testbed.set_world(bodies, colliders, joints);
testbed.look_at(Point3::new(10.0, 3.0, 0.0), Point3::new(0.0, 3.0, 0.0));
}
fn main() {
let testbed = Testbed::from_builders(0, vec![("Boxes", init_world)]);
testbed.run()
}
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