2017-09-19 00:00:34 -04:00
|
|
|
// pathfinder/path-utils/src/line.rs
|
|
|
|
//
|
|
|
|
// Copyright © 2017 The Pathfinder Project Developers.
|
|
|
|
//
|
|
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
|
|
// option. This file may not be copied, modified, or distributed
|
|
|
|
// except according to those terms.
|
|
|
|
|
|
|
|
//! Geometry utilities for straight line segments.
|
|
|
|
|
2017-09-20 19:18:55 -04:00
|
|
|
use euclid::{Point2D, Vector2D};
|
|
|
|
|
2017-09-25 18:58:00 -04:00
|
|
|
use intersection::Intersect;
|
2017-09-19 00:00:34 -04:00
|
|
|
|
2017-09-25 18:58:00 -04:00
|
|
|
#[derive(Clone, Copy, PartialEq, Debug)]
|
2017-09-19 00:00:34 -04:00
|
|
|
pub struct Line {
|
|
|
|
pub endpoints: [Point2D<f32>; 2],
|
|
|
|
}
|
|
|
|
|
|
|
|
impl Line {
|
|
|
|
#[inline]
|
|
|
|
pub fn new(endpoint_0: &Point2D<f32>, endpoint_1: &Point2D<f32>) -> Line {
|
|
|
|
Line {
|
|
|
|
endpoints: [*endpoint_0, *endpoint_1],
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline]
|
|
|
|
pub fn sample(&self, t: f32) -> Point2D<f32> {
|
|
|
|
self.endpoints[0].lerp(self.endpoints[1], t)
|
|
|
|
}
|
2017-09-20 19:18:55 -04:00
|
|
|
|
2017-09-21 21:57:48 -04:00
|
|
|
#[inline]
|
|
|
|
pub fn side(&self, point: &Point2D<f32>) -> f32 {
|
|
|
|
self.to_vector().cross(*point - self.endpoints[0])
|
|
|
|
}
|
|
|
|
|
2017-09-20 19:18:55 -04:00
|
|
|
#[inline]
|
|
|
|
pub(crate) fn to_vector(&self) -> Vector2D<f32> {
|
|
|
|
self.endpoints[1] - self.endpoints[0]
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline]
|
2017-09-25 18:58:00 -04:00
|
|
|
pub fn intersect<T>(&self, other: &T) -> Option<Point2D<f32>> where T: Intersect {
|
2017-09-20 19:18:55 -04:00
|
|
|
<Line as Intersect>::intersect(self, other)
|
|
|
|
}
|
2017-09-19 00:00:34 -04:00
|
|
|
}
|