heron_rapier 5.0.2

Physics behavior for Heron, using rapier
Documentation 
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#![cfg(any(dim2, dim3))]

use std::time::Duration;

use bevy::core::CorePlugin;
use bevy::prelude::*;
use bevy::reflect::TypeRegistryArc;
use bevy::time::TimePlugin;

use heron_core::utils::NearZero;
use heron_core::{CollisionShape, PhysicMaterial, PhysicsSteps, RigidBody};
use heron_rapier::convert::{IntoBevy, IntoRapier};
use heron_rapier::RapierPlugin;
use utils::*;

mod utils;

fn test_app() -> App {
    let mut builder = App::new();
    builder
        .init_resource::<TypeRegistryArc>()
        .insert_resource(PhysicsSteps::every_frame(Duration::from_secs(1)))
        .add_plugin(CorePlugin)
        .add_plugin(TimePlugin)
        .add_plugin(RapierPlugin);
    builder
}

#[test]
fn bodies_are_created_with_a_default_density() {
    let mut app = test_app();

    let entity = app
        .world
        .spawn()
        .insert_bundle((
            GlobalTransform::default(),
            RigidBody::Dynamic,
            CollisionShape::Sphere { radius: 10.0 },
        ))
        .id();

    app.update();

    let bodies = app.world.resource::<RigidBodySet>();
    let body = bodies
        .get(
            app.world
                .get::<heron_rapier::RigidBodyHandle>(entity)
                .unwrap()
                .into_rapier(),
        )
        .unwrap();
    assert!(body.mass() > 0.0);

    let center: Vec3 = body.mass_properties().local_com.coords.into_bevy();
    assert!(center.is_near_zero())
}

#[test]
fn bodies_are_created_with_defined_density() {
    let mut app = test_app();

    let entity = app
        .world
        .spawn()
        .insert_bundle((
            GlobalTransform::default(),
            RigidBody::Dynamic,
            CollisionShape::Sphere { radius: 1.0 },
            PhysicMaterial {
                density: 2.0,
                ..Default::default()
            },
        ))
        .id();

    app.update();

    let bodies = app.world.resource::<RigidBodySet>();
    let body = bodies
        .get(
            app.world
                .get::<heron_rapier::RigidBodyHandle>(entity)
                .unwrap()
                .into_rapier(),
        )
        .unwrap();

    assert_eq!(body.mass_properties(), &MassProperties::from_ball(2.0, 1.0));
}

#[test]
fn density_can_be_updated_after_creation() {
    let mut app = test_app();

    let entity = app
        .world
        .spawn()
        .insert_bundle((
            GlobalTransform::default(),
            RigidBody::Dynamic,
            CollisionShape::Sphere { radius: 1.0 },
        ))
        .id();

    app.update();

    app.world.entity_mut(entity).insert(PhysicMaterial {
        density: 2.0,
        ..Default::default()
    });

    app.update();

    let bodies = app.world.resource::<RigidBodySet>();
    let body = bodies
        .get(
            app.world
                .get::<heron_rapier::RigidBodyHandle>(entity)
                .unwrap()
                .into_rapier(),
        )
        .unwrap();

    assert_eq!(body.mass_properties(), &MassProperties::from_ball(2.0, 1.0));
}