math2 0.0.2

Geometry, layout and rasterization utilities powering the Grida canvas
Documentation 
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use math2::{
    format_number, normalize_line,
    transform::AffineTransform,
    transform_line, transform_point,
    ui::{Line, Point},
};

#[test]
fn transform_point_translation() {
    let p = Point {
        label: None,
        x: 1.0,
        y: 2.0,
    };
    let t = AffineTransform::translate(3.0, 4.0);
    let res = transform_point(&p, &t);
    assert_eq!(res.x, 4.0);
    assert_eq!(res.y, 6.0);
}

#[test]
fn transform_line_translation() {
    let line = Line {
        label: None,
        x1: 0.0,
        y1: 0.0,
        x2: 1.0,
        y2: 1.0,
    };
    let t = AffineTransform::translate(1.0, 2.0);
    let res = transform_line(&line, &t);
    assert_eq!((res.x1, res.y1, res.x2, res.y2), (1.0, 2.0, 2.0, 3.0));
}

#[test]
fn normalize_line_swaps_when_needed() {
    let line = Line {
        label: None,
        x1: 5.0,
        y1: 0.0,
        x2: 3.0,
        y2: 1.0,
    };
    let res = normalize_line(&line);
    assert_eq!((res.x1, res.y1, res.x2, res.y2), (3.0, 1.0, 5.0, 0.0));
}

#[test]
fn format_number_examples() {
    assert_eq!(format_number(1.0, 1), "1");
    assert_eq!(format_number(1.2222, 1), "1.2");
    assert_eq!(format_number(9.0001, 2), "9");
    assert_eq!(format_number(9.1234, 2), "9.12");
}