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use na::Point3;
use rand::distributions::{Distribution, Standard};
use rand::{rngs::StdRng, SeedableRng};
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();
/*
* Ground
*/
let ground_size = 40.0;
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);
/*
* Create the polyhedra
*/
let num = 5;
let scale = 2.0;
let border_rad = 0.1;
let shift = border_rad * 2.0 + scale;
let centerx = shift * (num / 2) as f32;
let centery = shift / 2.0;
let centerz = shift * (num / 2) as f32;
let mut rng = StdRng::seed_from_u64(0);
let distribution = Standard;
for j in 0usize..25 {
for i in 0..num {
for k in 0usize..num {
let x = i as f32 * shift - centerx;
let y = j as f32 * shift + centery + 3.0;
let z = k as f32 * shift - centerz;
let mut points = Vec::new();
for _ in 0..10 {
let pt: Point3<f32> = distribution.sample(&mut rng);
points.push(pt * scale);
}
// Build the rigid body.
let rigid_body = RigidBodyBuilder::new_dynamic().translation(x, y, z).build();
let handle = bodies.insert(rigid_body);
let collider = ColliderBuilder::round_convex_hull(&points, border_rad)
.unwrap()
.build();
colliders.insert(collider, handle, &mut bodies);
}
}
}
/*
* Set up the testbed.
*/
testbed.set_world(bodies, colliders, joints);
testbed.look_at(Point3::new(30.0, 30.0, 30.0), Point3::origin());
}
fn main() {
let testbed = Testbed::from_builders(0, vec![("Boxes", init_world)]);
testbed.run()
}
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