Galactica/crates/systemsim/src/util.rs

//! Conversion utilities

use cgmath::{Point2, Vector2};
use nalgebra;
use rapier2d::dynamics::RigidBody;

// TODO: Migrate to nalgebra fully, remove these converters

/// Convert a rigidbody position to a position in game coordinates
pub fn rigidbody_position(r: &RigidBody) -> cgmath::Point2<f32> {
	Point2 {
		x: r.translation()[0],
		y: r.translation()[1],
	}
}

/// Convert a rigidbody rotation to a rotation in game coordinates
pub fn rigidbody_rotation(r: &RigidBody) -> Vector2<f32> {
	Vector2 {
		x: r.rotation().re,
		y: r.rotation().im,
	}
}

/// Convert a rigidbody velocity to a velocity in game coordinates
pub fn rigidbody_velocity(r: &RigidBody) -> cgmath::Vector2<f32> {
	let v = r.velocity_at_point(&nalgebra::Point2::new(
		r.translation()[0],
		r.translation()[1],
	));
	Vector2 { x: v.x, y: v.y }
}