paperforge-core 0.1.0

/// A 2D point.
#[derive(Debug, Clone, Copy, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct Point {
    pub x: f64,
    pub y: f64,
}

impl Point {
    pub fn new(x: f64, y: f64) -> Self {
        Self { x, y }
    }

    pub fn distance(&self, other: &Self) -> f64 {
        ((self.x - other.x).powi(2) + (self.y - other.y).powi(2)).sqrt()
    }
}

/// A 2D size.
#[derive(Debug, Clone, Copy, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct Size {
    pub width: f64,
    pub height: f64,
}

impl Size {
    pub fn new(width: f64, height: f64) -> Self {
        Self { width, height }
    }
}

/// A rectangle.
#[derive(Debug, Clone, Copy, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct Rect {
    pub x: f64,
    pub y: f64,
    pub width: f64,
    pub height: f64,
}

impl Rect {
    pub fn new(x: f64, y: f64, width: f64, height: f64) -> Self {
        Self {
            x,
            y,
            width,
            height,
        }
    }

    pub fn from_points(x1: f64, y1: f64, x2: f64, y2: f64) -> Self {
        Self {
            x: x1.min(x2),
            y: y1.min(y2),
            width: (x2 - x1).abs(),
            height: (y2 - y1).abs(),
        }
    }

    pub fn contains(&self, px: f64, py: f64) -> bool {
        px >= self.x && px <= self.x + self.width && py >= self.y && py <= self.y + self.height
    }

    pub fn intersects(&self, other: &Self) -> bool {
        self.x < other.x + other.width
            && self.x + self.width > other.x
            && self.y < other.y + other.height
            && self.y + self.height > other.y
    }

    pub fn union(&self, other: &Self) -> Self {
        let x = self.x.min(other.x);
        let y = self.y.min(other.y);
        let max_x = (self.x + self.width).max(other.x + other.width);
        let max_y = (self.y + self.height).max(other.y + other.height);
        Self {
            x,
            y,
            width: max_x - x,
            height: max_y - y,
        }
    }

    pub fn intersection(&self, other: &Self) -> Option<Self> {
        let x = self.x.max(other.x);
        let y = self.y.max(other.y);
        let max_x = (self.x + self.width).min(other.x + other.width);
        let max_y = (self.y + self.height).min(other.y + other.height);
        if max_x > x && max_y > y {
            Some(Self {
                x,
                y,
                width: max_x - x,
                height: max_y - y,
            })
        } else {
            None
        }
    }
}

/// A transformation matrix.
#[derive(Debug, Clone, Copy, PartialEq)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct Matrix {
    pub a: f64,
    pub b: f64,
    pub c: f64,
    pub d: f64,
    pub e: f64,
    pub f: f64,
}

impl Matrix {
    pub fn identity() -> Self {
        Self {
            a: 1.0,
            b: 0.0,
            c: 0.0,
            d: 1.0,
            e: 0.0,
            f: 0.0,
        }
    }

    pub fn translate(tx: f64, ty: f64) -> Self {
        Self {
            a: 1.0,
            b: 0.0,
            c: 0.0,
            d: 1.0,
            e: tx,
            f: ty,
        }
    }

    pub fn scale(sx: f64, sy: f64) -> Self {
        Self {
            a: sx,
            b: 0.0,
            c: 0.0,
            d: sy,
            e: 0.0,
            f: 0.0,
        }
    }

    pub fn rotate(angle: f64) -> Self {
        let cos = angle.to_radians().cos();
        let sin = angle.to_radians().sin();
        Self {
            a: cos,
            b: sin,
            c: -sin,
            d: cos,
            e: 0.0,
            f: 0.0,
        }
    }

    pub fn combine(&self, other: &Self) -> Self {
        Self {
            a: self.a * other.a + self.b * other.c,
            b: self.a * other.b + self.b * other.d,
            c: self.c * other.a + self.d * other.c,
            d: self.c * other.b + self.d * other.d,
            e: self.e * other.a + self.f * other.c + other.e,
            f: self.e * other.b + self.f * other.d + other.f,
        }
    }

    pub fn transform_point(&self, x: f64, y: f64) -> (f64, f64) {
        (
            self.a * x + self.c * y + self.e,
            self.b * x + self.d * y + self.f,
        )
    }
}

/// Alias for Matrix.
pub type Transform = Matrix;