111 lines
2.6 KiB
Rust
111 lines
2.6 KiB
Rust
use std::ops::{RangeFrom, RangeFull, RangeInclusive, RangeToInclusive};
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/// Includive range of floats, i.e. `min..=max`, but more ergonomic than [`RangeInclusive`].
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#[repr(C)]
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#[derive(Clone, Copy, Debug, PartialEq)]
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#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
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#[cfg_attr(feature = "bytemuck", derive(bytemuck::Pod, bytemuck::Zeroable))]
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pub struct Rangef {
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pub min: f32,
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pub max: f32,
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}
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impl Rangef {
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/// Infinite range that contains everything, from -∞ to +∞, inclusive.
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pub const EVERYTHING: Self = Self {
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min: f32::NEG_INFINITY,
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max: f32::INFINITY,
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};
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/// The inverse of [`Self::EVERYTHING`]: stretches from positive infinity to negative infinity.
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/// Contains nothing.
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pub const NOTHING: Self = Self {
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min: f32::INFINITY,
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max: f32::NEG_INFINITY,
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};
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/// An invalid [`Rangef`] filled with [`f32::NAN`].
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pub const NAN: Self = Self {
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min: f32::NAN,
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max: f32::NAN,
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};
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#[inline]
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pub fn new(min: f32, max: f32) -> Self {
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Self { min, max }
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}
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#[inline]
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pub fn span(&self) -> f32 {
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self.max - self.min
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}
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#[inline]
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pub fn contains(&self, x: f32) -> bool {
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self.min <= x && x <= self.max
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}
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}
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impl From<Rangef> for RangeInclusive<f32> {
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#[inline]
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fn from(Rangef { min, max }: Rangef) -> Self {
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min..=max
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}
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}
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impl From<&Rangef> for RangeInclusive<f32> {
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#[inline]
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fn from(&Rangef { min, max }: &Rangef) -> Self {
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min..=max
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}
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}
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impl From<RangeInclusive<f32>> for Rangef {
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#[inline]
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fn from(range: RangeInclusive<f32>) -> Self {
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Self::new(*range.start(), *range.end())
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}
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}
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impl From<&RangeInclusive<f32>> for Rangef {
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#[inline]
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fn from(range: &RangeInclusive<f32>) -> Self {
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Self::new(*range.start(), *range.end())
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}
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}
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impl From<RangeFrom<f32>> for Rangef {
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#[inline]
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fn from(range: RangeFrom<f32>) -> Self {
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Self::new(range.start, f32::INFINITY)
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}
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}
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impl From<&RangeFrom<f32>> for Rangef {
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#[inline]
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fn from(range: &RangeFrom<f32>) -> Self {
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Self::new(range.start, f32::INFINITY)
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}
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}
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impl From<RangeFull> for Rangef {
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#[inline]
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fn from(_: RangeFull) -> Self {
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Self::new(f32::NEG_INFINITY, f32::INFINITY)
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}
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}
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impl From<&RangeFull> for Rangef {
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#[inline]
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fn from(_: &RangeFull) -> Self {
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Self::new(f32::NEG_INFINITY, f32::INFINITY)
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}
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}
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impl From<RangeToInclusive<f32>> for Rangef {
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#[inline]
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fn from(range: RangeToInclusive<f32>) -> Self {
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Self::new(f32::NEG_INFINITY, range.end)
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}
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}
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