93 lines
2.5 KiB
Rust
93 lines
2.5 KiB
Rust
use crate::Point;
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/// A rectangle.
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
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pub struct Rectangle<T = f32> {
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/// X coordinate of the top-left corner.
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pub x: T,
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/// Y coordinate of the top-left corner.
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pub y: T,
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/// Width of the rectangle.
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pub width: T,
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/// Height of the rectangle.
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pub height: T,
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}
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impl Rectangle<f32> {
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/// Returns true if the given [`Point`] is contained in the [`Rectangle`].
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///
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/// [`Point`]: struct.Point.html
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/// [`Rectangle`]: struct.Rectangle.html
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pub fn contains(&self, point: Point) -> bool {
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self.x <= point.x
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&& point.x <= self.x + self.width
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&& self.y <= point.y
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&& point.y <= self.y + self.height
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}
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/// Computes the intersection with the given [`Rectangle`].
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///
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/// [`Rectangle`]: struct.Rectangle.html
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pub fn intersection(
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&self,
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other: &Rectangle<f32>,
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) -> Option<Rectangle<f32>> {
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let x = self.x.max(other.x);
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let y = self.y.max(other.y);
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let lower_right_x = (self.x + self.width).min(other.x + other.width);
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let lower_right_y = (self.y + self.height).min(other.y + other.height);
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let width = lower_right_x - x;
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let height = lower_right_y - y;
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if width > 0.0 && height > 0.0 {
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Some(Rectangle {
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x,
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y,
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width,
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height,
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})
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} else {
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None
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}
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}
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}
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impl std::ops::Mul<f32> for Rectangle<u32> {
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type Output = Self;
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fn mul(self, scale: f32) -> Self {
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Self {
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x: (self.x as f32 * scale).round() as u32,
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y: (self.y as f32 * scale).round() as u32,
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width: (self.width as f32 * scale).round() as u32,
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height: (self.height as f32 * scale).round() as u32,
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}
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}
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}
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impl From<Rectangle<u32>> for Rectangle<f32> {
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fn from(rectangle: Rectangle<u32>) -> Rectangle<f32> {
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Rectangle {
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x: rectangle.x as f32,
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y: rectangle.y as f32,
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width: rectangle.width as f32,
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height: rectangle.height as f32,
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}
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}
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}
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impl From<Rectangle<f32>> for Rectangle<u32> {
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fn from(rectangle: Rectangle<f32>) -> Rectangle<u32> {
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Rectangle {
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x: rectangle.x as u32,
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y: rectangle.y as u32,
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width: rectangle.width.ceil() as u32,
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height: rectangle.height.ceil() as u32,
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}
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}
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}
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