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//! Math helpers
use crate::prelude::*;
/// Extension crate for [`IRect`]. Adds helpers.
pub trait RectExt {
/// Like `contains`, but excludes the end bounds of the rectangle
fn contains_exclusive(self, point: IVec2) -> bool;
/// Creates a rectangle from a position, size, and anchor
fn pos_size_anchor(pos: IVec2, size: UVec2, anchor: PxAnchor) -> Self;
/// Subtracts an [`IVec2`] from the rectangle's points
fn sub_ivec2(self, other: IVec2) -> Self;
}
impl RectExt for IRect {
fn contains_exclusive(self, point: IVec2) -> bool {
point.cmpge(self.min).all() && point.cmplt(self.max).all()
}
fn pos_size_anchor(pos: IVec2, size: UVec2, anchor: PxAnchor) -> Self {
let min = pos - anchor.pos(size).as_ivec2();
Self {
min,
max: min + size.as_ivec2(),
}
}
fn sub_ivec2(self, other: IVec2) -> Self {
Self {
min: self.min - other,
max: self.max - other,
}
}
}
/// An orthogonal direction
#[derive(Debug)]
pub enum Orthogonal {
/// Right
Right,
/// Up
Up,
/// Left
Left,
/// Down
Down,
}
/// A diagonal direction
#[derive(Copy, Clone)]
pub enum Diagonal {
/// Up-right
UpRight,
/// Up-left
UpLeft,
/// Down-left
DownLeft,
/// Down-right
DownRight,
}
impl Diagonal {
/// 1 for each positive axis and 0 for each negative axis
pub fn as_uvec2(self) -> UVec2 {
use Diagonal::*;
match self {
UpRight => UVec2::ONE,
UpLeft => UVec2::new(0, 1),
DownLeft => UVec2::ZERO,
DownRight => UVec2::new(1, 0),
}
}
}