73 lines
2.0 KiB
Rust
73 lines
2.0 KiB
Rust
use na::{DVector, Point2, Vector2};
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use rapier2d::dynamics::{JointSet, RigidBodyBuilder, RigidBodySet};
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use rapier2d::geometry::{ColliderBuilder, ColliderSet};
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use rapier_testbed2d::Testbed;
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pub fn init_world(testbed: &mut Testbed) {
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/*
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* World
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*/
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let mut bodies = RigidBodySet::new();
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let mut colliders = ColliderSet::new();
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let joints = JointSet::new();
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/*
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* Ground
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*/
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let ground_size = Vector2::new(50.0, 1.0);
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let nsubdivs = 2000;
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let heights = DVector::from_fn(nsubdivs + 1, |i, _| {
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if i == 0 || i == nsubdivs {
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80.0
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} else {
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(i as f32 * ground_size.x / (nsubdivs as f32)).cos() * 2.0
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}
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});
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let rigid_body = RigidBodyBuilder::new_static().build();
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let handle = bodies.insert(rigid_body);
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let collider = ColliderBuilder::heightfield(heights, ground_size).build();
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colliders.insert(collider, handle, &mut bodies);
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/*
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* Create the cubes
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*/
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let num = 26;
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let rad = 0.5;
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let shift = rad * 2.0;
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let centerx = shift * (num / 2) as f32;
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let centery = shift / 2.0;
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for i in 0..num {
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for j in 0usize..num * 5 {
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let x = i as f32 * shift - centerx;
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let y = j as f32 * shift + centery + 3.0;
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// Build the rigid body.
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let rigid_body = RigidBodyBuilder::new_dynamic().translation(x, y).build();
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let handle = bodies.insert(rigid_body);
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if j % 2 == 0 {
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let collider = ColliderBuilder::cuboid(rad, rad).density(1.0).build();
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colliders.insert(collider, handle, &mut bodies);
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} else {
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let collider = ColliderBuilder::ball(rad).density(1.0).build();
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colliders.insert(collider, handle, &mut bodies);
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}
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}
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}
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/*
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* Set up the testbed.
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*/
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testbed.set_world(bodies, colliders, joints);
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testbed.look_at(Point2::new(0.0, 50.0), 10.0);
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}
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fn main() {
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let testbed = Testbed::from_builders(0, vec![("Heightfield", init_world)]);
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testbed.run()
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}
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