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use std::fmt;
use std::cmp::{Eq, Ordering};
use std::hash::{Hash, Hasher};
use result::*;
use traits::is_nd::*;
use traits::is_2d::*;
use traits::is_moveable_2d::*;
use traits::is_buildable_nd::*;
use traits::is_buildable_2d::*;
use traits::is_editable_nd::*;
use traits::is_editable_2d::*;
use traits::is_buildable_3d::*;
use traits::transformable_to_3d::*;
use functions::{sqr_dist_2d};
#[derive (PartialEq, PartialOrd)]
pub struct Point2D {
pub x: f64,
pub y: f64
}
impl Eq for Point2D {}
impl Ord for Point2D {
fn cmp(&self, other: &Self) -> Ordering {
let origin = *Point2D::new();
sqr_dist_2d(&origin, self).partial_cmp(&sqr_dist_2d(&origin, other)).unwrap_or(Ordering::Equal)
}
}
impl Hash for Point2D {
fn hash<H: Hasher>(&self, state: &mut H) {
(self.x as u64).hash(state);
(self.y as u64).hash(state);
}
}
impl Clone for Point2D {
fn clone(&self) -> Point2D {
Point2D { x: self.x, y: self.y }
}
}
impl IsMoveable2D for Point2D {
fn move_by(&mut self, x: f64, y: f64) {
self.x += x;
self.y += y;
}
}
impl IsND for Point2D {
fn n_dimensions() -> usize {
2
}
fn get_position(&self, dimension: usize) -> Result<f64> {
match dimension {
0 => Ok(self.x),
1 => Ok(self.y),
_ => Err(ErrorKind::IncorrectDimension)
}
}
}
impl Is2D for Point2D {
fn x(&self) -> f64 {
self.x
}
fn y(&self) -> f64 {
self.y
}
}
impl IsBuildableND for Point2D {
fn new() -> Box<Self> {
Box::new(Point2D{x: 0.0, y: 0.0})
}
fn build_nd(coords: &Vec<f64>) -> Result<Box<Self>> {
if coords.len() != 2 {
return Err(ErrorKind::DimensionsDontMatch);
}
Ok(Box::new(Point2D{x: coords[0], y: coords[1]}))
}
fn from_nd<P>(&mut self, other: P) -> Result<()> where
P: IsBuildableND {
if P::n_dimensions() != 2 {
return Err(ErrorKind::DimensionsDontMatch);
}
self.x = try!(other.get_position(0));
self.y = try!(other.get_position(1));
Ok(())
}
}
impl IsBuildable2D for Point2D {
fn build(x: f64, y: f64) -> Box<Self> {
Box::new(Point2D{x: x, y: y})
}
fn from<P>(&mut self, other: P) where P: IsBuildable2D {
self.x = other.x();
self.y = other.y();
}
}
impl IsEditableND for Point2D {
fn set_position(&mut self, dimension: usize, val: f64) -> Result<()> {
match dimension {
0 => self.x = val,
1 => self.y = val,
_ => return Err(ErrorKind::DimensionsDontMatch),
}
Ok(())
}
}
impl IsEditable2D for Point2D {
fn set_x(&mut self, val: f64) {
self.x = val;
}
fn set_y(&mut self, val: f64) {
self.y = val;
}
}
impl TransFormableTo3D for Point2D {
fn transform_to_3d<P>(&self, z: f64) -> P where
P: IsBuildable3D {
*P::build(self.x, self.y, z)
}
}
impl fmt::Display for Point2D {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "({}, {})", self.x, self.y)
}
}