normalize method for Rect (#10297)

# Objective

`normalize` method that expresses a rectangle relative to a normalized
[0..1] x [0..1] space defined by another rectangle.

Useful for UI and texture atlas calculations etc.

---------

Co-authored-by: Rob Parrett <robparrett@gmail.com>
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ickshonpe 2023-10-28 20:02:58 +01:00 committed by GitHub
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@ -309,6 +309,30 @@ impl Rect {
r
}
/// Build a new rectangle from this one with its coordinates expressed
/// relative to `other` in a normalized ([0..1] x [0..1]) coordinate system.
///
/// # Examples
///
/// ```rust
/// # use bevy_math::{Rect, Vec2};
/// let r = Rect::new(2., 3., 4., 6.);
/// let s = Rect::new(0., 0., 10., 10.);
/// let n = r.normalize(s);
///
/// assert_eq!(n.min.x, 0.2);
/// assert_eq!(n.min.y, 0.3);
/// assert_eq!(n.max.x, 0.4);
/// assert_eq!(n.max.y, 0.6);
/// ```
pub fn normalize(&self, other: Self) -> Self {
let outer_size = other.size();
Self {
min: (self.min - other.min) / outer_size,
max: (self.max - other.min) / outer_size,
}
}
/// Returns self as [`IRect`] (i32)
#[inline]
pub fn as_irect(&self) -> IRect {