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use rapier3d::prelude::*;
use rapier_testbed3d::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();
/*
* Ground
*/
let ground_size = 100.1;
let ground_height = 0.1;
let rigid_body = RigidBodyBuilder::fixed().translation(vector![0.0, -ground_height, 0.0]);
let handle = bodies.insert(rigid_body);
let collider = ColliderBuilder::cuboid(ground_size, ground_height, ground_size);
colliders.insert_with_parent(collider, handle, &mut bodies);
/*
* Create the cubes
*/
let num = 4;
let numj = 20;
let rad = 1.0;
let shiftx = rad * 2.0 + rad;
let shifty = rad * 2.0 + rad;
let shiftz = rad * 2.0 + rad;
let centerx = shiftx * (num / 2) as f32;
let centery = shifty / 2.0;
let centerz = shiftz * (num / 2) as f32;
let mut offset = -(num as f32) * (rad * 2.0 + rad) * 0.5;
for j in 0usize..numj {
for i in 0..num {
for k in 0usize..num {
let x = i as f32 * shiftx - centerx + offset;
let y = j as f32 * shifty + centery + 3.0;
let z = k as f32 * shiftz - centerz + offset;
// Build the rigid body.
let rigid_body = RigidBodyBuilder::dynamic()
.translation(vector![x, y, z])
.linvel(vector![0.0, -1000.0, 0.0])
.ccd_enabled(true);
let handle = bodies.insert(rigid_body);
let collider = match j % 5 {
0 => ColliderBuilder::cuboid(rad, rad, rad),
1 => ColliderBuilder::ball(rad),
// Rounded cylinders are much more efficient that cylinder, even if the
// rounding margin is small.
// 2 => ColliderBuilder::round_cylinder(rad, rad, rad / 10.0),
// 3 => ColliderBuilder::cone(rad, rad),
_ => ColliderBuilder::capsule_y(rad, rad),
};
colliders.insert_with_parent(collider, handle, &mut bodies);
}
}
offset -= 0.05 * rad * (num as f32 - 1.0);
}
/*
* Set up the testbed.
*/
testbed.set_world(bodies, colliders, impulse_joints, multibody_joints);
testbed.look_at(point![100.0, 100.0, 100.0], Point::origin());
}
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