rustyray 0.2.0

High-level wrapper on top of the low-level rustyray-sys bindings
Documentation 
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use std::fmt::Display;

use super::Vector2;

#[repr(C)]
#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Rectangle {
    pub x: f32,
    pub y: f32,
    pub width: f32,
    pub height: f32,
}

impl Rectangle {
    pub fn new(x: f32, y: f32, width: f32, height: f32) -> Self {
        Self {
            x,
            y,
            width,
            height,
        }
    }

    /// Get the x and y position of the rectangle as a [Vector2]
    pub fn position(&self) -> Vector2 {
        Vector2 {
            x: self.x,
            y: self.y,
        }
    }

    /// Get the width and height of the rectangle as a [Vector2]
    #[inline]
    pub fn size(&self) -> Vector2 {
        Vector2 {
            x: self.width,
            y: self.height,
        }
    }

    pub fn collides_rect(&self, other: &Rectangle) -> bool {
        if (self.x < (other.x + other.width) && (self.x + self.width) > other.x)
            && (self.y < (other.y + other.height) && (self.y + self.height) > other.y)
        {
            return true;
        }

        false
    }

    pub fn collides_point(&self, point: &Vector2) -> bool {
        if (point.x >= self.x)
            && (point.x < (self.x + self.width))
            && (point.y >= self.y)
            && (point.y < (self.y + self.height))
        {
            return true;
        }
        false
    }

    pub fn collides_circle(&self, center: Vector2, radius: f32) -> bool {
        let nearest_x;
        if center.x < self.x {
            nearest_x = self.x;
        } else if center.x > self.x + self.width {
            nearest_x = self.x + self.width;
        } else {
            nearest_x = center.x;
        }

        let nearest_y;
        if center.y < self.y {
            nearest_y = self.y;
        } else if center.y > self.y + self.height {
            nearest_y = self.y + self.height;
        } else {
            nearest_y = center.y;
        }

        let delta = Vector2::new(center.x - nearest_x, center.y - nearest_y);

        delta.length() < radius
    }

    pub fn get_collision_rect(&self, other: &Rectangle) -> Rectangle {
        let mut overlap = Rectangle::new(0.0, 0.0, 0.0, 0.0);

        let left = if self.x > other.x { self.x } else { other.x };
        let right1 = self.x + self.width;
        let right2 = other.x + other.width;
        let right = if right1 < right2 { right1 } else { right2 };
        let top = if self.y > other.y { self.y } else { other.y };
        let bottom1 = self.y + self.height;
        let bottom2 = other.y + other.height;
        let bottom = if bottom1 < bottom2 { bottom1 } else { bottom2 };

        if (left < right) && (top < bottom) {
            overlap.x = left;
            overlap.y = top;
            overlap.width = right - left;
            overlap.height = bottom - top;
        }

        overlap
    }
}

impl From<rustyray_sys::math::Rectangle> for Rectangle {
    fn from(value: rustyray_sys::math::Rectangle) -> Self {
        unsafe { std::mem::transmute(value) }
    }
}

impl From<Rectangle> for rustyray_sys::math::Rectangle {
    fn from(value: Rectangle) -> Self {
        unsafe { std::mem::transmute(value) }
    }
}

impl From<&Rectangle> for rustyray_sys::math::Rectangle {
    fn from(value: &Rectangle) -> Self {
        unsafe { std::mem::transmute_copy(value) }
    }
}

impl Display for Rectangle {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.write_str(
            format!(
                "Rectangle{{x: {}, y: {}, width: {}, height: {}}}",
                self.x, self.y, self.width, self.height
            )
            .as_str(),
        )
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_collides_rect() {
        let rect_a = Rectangle::new(0.0, 0.0, 10.0, 10.0);
        let rect_b = Rectangle::new(5.0, 5.0, 6.0, 6.0);
        assert!(rect_a.collides_rect(&rect_b));
        assert!(rect_b.collides_rect(&rect_a));
    }

    #[test]
    fn test_does_not_collides_rect() {
        let rect_a = Rectangle::new(0.0, 0.0, 10.0, 10.0);
        let rect_b = Rectangle::new(10.0, 10.0, 10.0, 10.0);
        assert!(rect_a.collides_rect(&rect_b) == false);
        assert!(rect_b.collides_rect(&rect_a) == false);
    }

    #[test]
    fn test_collides_circle() {
        let rect_a = Rectangle::new(0.0, 0.0, 10.0, 10.0);
        let center = Vector2::new(12.0, 12.0);
        let radius = 3.0;
        assert!(rect_a.collides_circle(center, radius));
    }

    #[test]
    fn test_does_not_collides_circle() {
        let rect_a = Rectangle::new(0.0, 0.0, 10.0, 10.0);
        let center = Vector2::new(12.0, 12.0);
        let radius = 2.0;
        assert!(rect_a.collides_circle(center, radius) == false);
    }

    // For when benches become stable
    // use test::Bencher;
    // extern crate test;
    // #[bench]
    // fn bench_rect_circle_collision(b: &mut Bencher) {
    //     let rect_a = Rectangle::new(0.0, 0.0, 10.0, 10.0);
    //     let center = Vector2::new(12.0, 12.0);
    //     let radius = 3.0;
    //     b.iter(|| {
    //         rect_a.collides_circle(center, radius);
    //     });
    // }
}