physics2d 0.6.0

Yet another 2D physics engine, but with Iron power.
Documentation 
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mod circle;
mod polygon;

pub use self::circle::Circle;
pub use self::polygon::Polygon;
use math::Bounds;
use world::Transform;

#[derive(Clone)]
pub enum Shape {
    Circle(Circle),
    Polygon(Polygon),
}

generate_match_borrow_fn_macro_for_enum!(Shape::{Circle, Polygon}; match_fn_to_shape);

pub trait Matter {
    fn mass_and_inertia(&self, density: f32) -> (f32, f32);
    fn bounds(&self, transform: Option<&Transform>) -> Bounds;
}

impl Matter for Shape {
    fn mass_and_inertia(&self, density: f32) -> (f32, f32) {
        match_fn_to_shape!(*self, mass_and_inertia(density))
    }
    
    fn bounds(&self, transform: Option<&Transform>) -> Bounds {
        match_fn_to_shape!(*self, bounds(transform))
    }
}