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[emath] Use const values for Vec2::ZERO, Rect::EVERYTHING etc

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This commit is contained in:
Emil Ernerfeldt
2021-02-05 09:49:21 +01:00
parent 10e86b055d
commit 2d9d06dbff
20 changed files with 118 additions and 71 deletions
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43
emath/src/rect.rs
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@@ -1,3 +1,4 @@
use std::f32::INFINITY;
use std::ops::RangeInclusive;
use crate::*;
@@ -13,7 +14,37 @@ pub struct Rect {
}
impl Rect {
/// Infinite rectangle that contains everything
/// Infinite rectangle that contains everything.
pub const EVERYTHING: Self = Self {
min: pos2(-INFINITY, -INFINITY),
max: pos2(INFINITY, INFINITY),
};
/// The inverse of [`Self::EVERYTHING`]: streches from positive infinity to negative infinity.
/// Contains no points.
///
/// This is useful as the seed for boulding bounding boxes.
///
/// # Example:
/// ```
/// # use emath::*;
/// let mut rect = Rect::NOTHING;
/// rect.extend_with(pos2(2.0, 1.0));
/// rect.extend_with(pos2(0.0, 3.0));
/// assert_eq!(rect, Rect::from_min_max(pos2(0.0, 1.0), pos2(2.0, 3.0)))
/// ```
pub const NOTHING: Self = Self {
min: pos2(INFINITY, INFINITY),
max: pos2(-INFINITY, -INFINITY),
};
/// An invalid `Rect` filled with [`f32::NAN`];
pub const NAN: Self = Self {
min: pos2(f32::NAN, f32::NAN),
max: pos2(-f32::NAN, -f32::NAN),
};
#[deprecated = "Use Rect::EVERYTHING"]
pub fn everything() -> Self {
let inf = f32::INFINITY;
Self {
@@ -22,6 +53,7 @@ impl Rect {
}
}
#[deprecated = "Use Rect::NOTHING"]
pub fn nothing() -> Self {
let inf = f32::INFINITY;
Self {
@@ -30,15 +62,12 @@ impl Rect {
}
}
/// invalid, NAN filled Rect.
#[deprecated = "Use Rect::NAN"]
pub fn invalid() -> Self {
Self {
min: pos2(f32::NAN, f32::NAN),
max: pos2(f32::NAN, f32::NAN),
}
Self::NAN
}
pub fn from_min_max(min: Pos2, max: Pos2) -> Self {
pub const fn from_min_max(min: Pos2, max: Pos2) -> Self {
Rect { min, max }
}