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/*
Copyright 2017 Martin Buck
This file is part of rust-3d.
rust-3d is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
rust-3d is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with rust-3d. If not, see <http://www.gnu.org/licenses/>.
*/
//! LineSegment2D, a line segment within 2D space
use std::fmt;
use prelude::*;
#[derive (Debug, PartialEq, PartialOrd, Eq, Clone, Hash)]
/// LineSegment2D, a line segment within 2D space
pub struct LineSegment2D {
pub line: Line2D,
pub length: Positive,
}
impl LineSegment2D {
/// Creates a new LineSegment2D from a Line2D and a length
pub fn new(line: Line2D, length: Positive) -> Self {
LineSegment2D{line: line, length: length}
}
}
impl IsMovable2D for LineSegment2D {
fn move_by(&mut self, x: f64, y: f64) {
self.line.move_by(x, y);
}
}
impl HasLength for LineSegment2D {
fn length(&self) -> f64 {
self.length.get()
}
}
impl HasBoundingBox2D for LineSegment2D {
fn bounding_box(&self) -> Result<BoundingBox2D> {
let mut pts = Vec::new();
pts.push(Box::new(self.line.anchor.clone()));
pts.push(Box::new(self.line.anchor.clone() + self.line.dir.clone() * self.length.get()));
BoundingBox2D::from_iterator(pts.iter())
}
}
impl HasCenterOfGravity2D for LineSegment2D {
fn center_of_gravity(&self) -> Result<Point2D> {
Ok(self.line.anchor.clone() + self.line.dir.clone() * 0.5 * self.length.get())
}
}
impl fmt::Display for LineSegment2D {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "({}, {} -> {} * {}, {})", self.line.anchor.x(), self.line.anchor.y(), self.length, self.line.dir.x(), self.line.dir.y())
}
}