impacted 2.0.3

2d collision test for arbitrary convex shapes
Documentation 
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mod array;
mod glam;

pub(crate) trait Dot {
    type Output;
    fn dot(self, other: Self) -> Self::Output;
}

pub(crate) trait Cross {
    type Output;
    fn cross(self, other: Self) -> Self::Output;
}

pub(crate) trait Perp {
    /// Rotate the vector by 90 degrees
    ///
    /// The rotation direction should be so that the perpendicular of the x-axis is the y-axis.
    fn perp(self) -> Self;
}

pub(crate) trait Normalize: Sized {
    fn normalize(self) -> Option<Self>;
}

pub(crate) trait CmpToZero: Copy {
    fn is_negative(self) -> bool;
    fn is_zero(self) -> bool;
    fn is_positive(self) -> bool;
}

pub(crate) trait MagnitudeSquared {
    type Scalar;
    fn magnitude_squared(self) -> Self::Scalar;
}

impl<V: Dot + Copy> MagnitudeSquared for V {
    type Scalar = <V as Dot>::Output;
    fn magnitude_squared(self) -> Self::Scalar {
        self.dot(self)
    }
}

impl CmpToZero for f32 {
    fn is_negative(self) -> bool {
        self < 0.0
    }

    fn is_zero(self) -> bool {
        self == 0.0
    }

    fn is_positive(self) -> bool {
        self > 0.0
    }
}

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

    #[rstest]
    #[case([0.0, 0.0], 0.0)]
    #[case([2.0, 3.0], 13.0)]
    #[case([3.0, 4.0], 25.0)]
    #[case([4.0, 3.0], 25.0)]
    fn test_magnitude_squared(#[case] vector: [f32; 2], #[case] expected: f32) {
        assert_ulps_eq!(vector.magnitude_squared(), expected);
    }
}