pierro/core/math/
margin.rs

1use super::{vec2, Axis, Range, Rect, Vec2};
2
3
4#[derive(Clone, Copy)]
5pub struct Margin {
6    /// The margin at the minimum corner of the rectange (left, top)
7    pub min: Vec2,
8    /// The margin at the maximum corner of the rectangle (right, bottom)
9    pub max: Vec2 
10}
11
12impl Margin {
13
14    pub const fn new(left: f32, top: f32, right: f32, bottom: f32) -> Self {
15        Self {
16            min: vec2(left, top),
17            max: vec2(right, bottom)
18        }
19    }
20
21    pub const fn same(margin: f32) -> Self {
22        Self::new(margin, margin, margin, margin)
23    }
24
25    pub const fn horizontal(margin: f32) -> Self {
26        Self::new(margin, 0.0, margin, 0.0)
27    }
28
29    pub const fn vertical(margin: f32) -> Self {
30        Self::new(0.0, margin, 0.0, margin)
31    }
32
33    pub const ZERO: Self = Self::same(0.0);
34
35    pub fn total(&self) -> Vec2 {
36        self.min + self.max
37    }
38
39    pub fn on_axis(&self, axis: Axis) -> (f32, f32) {
40        (self.min.on_axis(axis), self.max.on_axis(axis))
41    }
42
43    pub fn apply_on_axis(&self, space: Range, axis: Axis) -> Range {
44        let (margin_min, margin_max) = self.on_axis(axis);
45        if space.size() > margin_min + margin_max {
46            Range::new(space.min + margin_min, space.max - margin_max)
47        } else {
48            Range::point(space.center())
49        }
50    }
51
52    pub fn apply(&self, rect: Rect) -> Rect {
53        Rect::from_ranges(
54            self.apply_on_axis(rect.x_range(), Axis::X),
55            self.apply_on_axis(rect.y_range(), Axis::Y) 
56        )
57    }
58
59}
pierro/core/math/margin.rs

pierro/core/math/
margin.rs
