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use std::fmt;
use crate::*;
#[derive(Debug, PartialEq, PartialOrd, Eq, Clone, Hash)]
pub struct LineSegment2D {
pub start: Point2D,
pub end: Point2D,
}
impl LineSegment2D {
pub fn new(start: Point2D, end: Point2D) -> Self {
LineSegment2D { start, end }
}
}
impl IsMovable2D for LineSegment2D {
fn move_by(&mut self, x: f64, y: f64) {
self.start.move_by(x, y);
self.end.move_by(x, y);
}
}
impl HasLength for LineSegment2D {
fn length(&self) -> f64 {
dist_2d(&self.start, &self.end)
}
}
impl HasBoundingBox2DMaybe for LineSegment2D {
fn bounding_box_maybe(&self) -> Result<BoundingBox2D> {
BoundingBox2D::from_iterator([&self.start, &self.end].iter().map(|x| *x))
}
}
impl HasCenterOfGravity2D for LineSegment2D {
fn center_of_gravity(&self) -> Result<Point2D> {
Ok(center_2d(&self.start, &self.end))
}
}
impl IsScalable for LineSegment2D {
fn scale(&mut self, factor: Positive) {
if let Ok(c) = self.bounding_box_maybe().map(|x| x.center_bb()) {
self.start.increase_distance_to_by(&c, factor);
self.end.increase_distance_to_by(&c, factor);
}
}
}
impl IsMatrix3Transformable for LineSegment2D {
fn transformed(&self, m: &Matrix3) -> Self {
let mut new = self.clone();
new.transform(m);
new
}
fn transform(&mut self, m: &Matrix3) {
self.start.transform(m);
self.end.transform(m);
}
}
impl fmt::Display for LineSegment2D {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(
f,
"({}, {} -> {}, {})",
self.start.x(),
self.start.y(),
self.end.x(),
self.end.y()
)
}
}