1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
use na::Point2;
use rand::distributions::{Distribution, Standard};
use rand::{rngs::StdRng, SeedableRng};
use rapier2d::dynamics::{JointSet, RigidBodyBuilder, RigidBodySet};
use rapier2d::geometry::{ColliderBuilder, ColliderSet};
use rapier_testbed2d::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 = 30.0;
let rigid_body = RigidBodyBuilder::new_static().build();
let handle = bodies.insert(rigid_body);
let collider = ColliderBuilder::cuboid(ground_size, 1.2).build();
colliders.insert(collider, handle, &mut bodies);
let rigid_body = RigidBodyBuilder::new_static()
.rotation(std::f32::consts::FRAC_PI_2)
.translation(ground_size, ground_size * 2.0)
.build();
let handle = bodies.insert(rigid_body);
let collider = ColliderBuilder::cuboid(ground_size * 2.0, 1.2).build();
colliders.insert(collider, handle, &mut bodies);
let rigid_body = RigidBodyBuilder::new_static()
.rotation(std::f32::consts::FRAC_PI_2)
.translation(-ground_size, ground_size * 2.0)
.build();
let handle = bodies.insert(rigid_body);
let collider = ColliderBuilder::cuboid(ground_size * 2.0, 1.2).build();
colliders.insert(collider, handle, &mut bodies);
/*
* Create the convex polygons
*/
let num = 26;
let scale = 2.0;
let border_rad = 0.0;
let shift = border_rad * 2.0 + scale;
let centerx = shift * (num as f32) / 2.0;
let centery = shift / 2.0;
let mut rng = StdRng::seed_from_u64(0);
let distribution = Standard;
for i in 0..num {
for j in 0usize..num * 5 {
let x = i as f32 * shift - centerx;
let y = j as f32 * shift * 2.0 + centery + 2.0;
let rigid_body = RigidBodyBuilder::new_dynamic().translation(x, y).build();
let handle = bodies.insert(rigid_body);
let mut points = Vec::new();
for _ in 0..10 {
let pt: Point2<f32> = distribution.sample(&mut rng);
points.push(pt * scale);
}
let collider = ColliderBuilder::convex_hull(&points).unwrap().build();
colliders.insert(collider, handle, &mut bodies);
}
}
/*
* Set up the testbed.
*/
testbed.set_world(bodies, colliders, joints);
testbed.look_at(Point2::new(0.0, 50.0), 10.0);
}
fn main() {
let testbed = Testbed::from_builders(0, vec![("Balls", init_world)]);
testbed.run()
}
|
