46 lines
1.3 KiB
Rust
46 lines
1.3 KiB
Rust
use na::{Point3, Vector3};
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use rapier3d::dynamics::{JointSet, RigidBodyBuilder, RigidBodySet};
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use rapier3d::geometry::{ColliderBuilder, ColliderSet};
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use rapier_testbed3d::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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* Create the balls
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*/
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let num = 10;
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let rad = 0.2;
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let subdiv = 1.0 / (num as f32);
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for i in 0usize..num {
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let (x, y) = (i as f32 * subdiv * std::f32::consts::PI * 2.0).sin_cos();
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// Build the rigid body.
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let rb = RigidBodyBuilder::new_dynamic()
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.translation(x, y, 0.0)
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.linvel(x * 10.0, y * 10.0, 0.0)
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.angvel(Vector3::z() * 100.0)
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.linear_damping((i + 1) as f32 * subdiv * 10.0)
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.angular_damping((num - i) as f32 * subdiv * 10.0)
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.build();
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let rb_handle = bodies.insert(rb);
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// Build the collider.
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let co = ColliderBuilder::cuboid(rad, rad, rad).build();
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colliders.insert(co, rb_handle, &mut bodies);
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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_with_gravity(bodies, colliders, joints, Vector3::zeros());
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testbed.look_at(Point3::new(2.0, 2.5, 20.0), Point3::new(2.0, 2.5, 0.0));
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}
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