specs-physics 0.3.0

nphysics integration for the Specs entity component system
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#[macro_use]
extern crate log;
extern crate simple_logger;

use specs::world::{Builder, World};
use specs_physics::{
    colliders::Shape,
    events::ContactEvents,
    nalgebra::Isometry3,
    nphysics::{algebra::Velocity3, object::BodyStatus},
    physics_dispatcher,
    PhysicsBodyBuilder,
    PhysicsColliderBuilder,
    SimplePosition,
};

fn main() {
    // initialise the logger for system logs
    simple_logger::init().unwrap();

    // initialise the Specs world; this will contain our Resources and Entities
    let mut world = World::new();

    // create the dispatcher containing all relevant Systems; alternatively to using
    // the convenience function you can add all required Systems by hand
    let mut dispatcher = physics_dispatcher::<f32, SimplePosition<f32>>();
    dispatcher.setup(&mut world.res);
    let mut contact_event_reader = world.res.fetch_mut::<ContactEvents>().register_reader();

    // create an Entity with a dynamic PhysicsBody component and a velocity
    world
        .create_entity()
        .with(SimplePosition::<f32>(Isometry3::<f32>::translation(
            1.0, 1.0, 1.0,
        )))
        .with(
            PhysicsBodyBuilder::<f32>::from(BodyStatus::Dynamic)
                .velocity(Velocity3::linear(1.0, 0.0, 0.0))
                .build(),
        )
        .with(PhysicsColliderBuilder::<f32>::from(Shape::Rectangle(2.0, 2.0, 1.0)).build())
        .build();

    // create an Entity with a static PhysicsBody component right now to the first
    // one
    world
        .create_entity()
        .with(SimplePosition::<f32>(Isometry3::<f32>::translation(
            3.0, 1.0, 1.0,
        )))
        .with(PhysicsBodyBuilder::<f32>::from(BodyStatus::Static).build())
        .with(PhysicsColliderBuilder::<f32>::from(Shape::Rectangle(2.0, 2.0, 1.0)).build())
        .build();

    // execute the dispatcher
    dispatcher.dispatch(&world.res);

    // check the ContactEvents channel for events
    let contact_events = world.read_resource::<ContactEvents>();
    for contact_event in contact_events.read(&mut contact_event_reader) {
        info!("Read ContactEvent from channel: {:?}", contact_event);
    }
}