gemath 0.1.0

Type-safe game math with type-level units/spaces, typed angles, and explicit fallible ops (plus optional geometry/collision).
Documentation 
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//! Floating-point math helpers.
//!
//! This module exists to support `no_std` builds. In `std` builds we use the
//! built-in `f32` methods; in `no_std` builds we require the `libm` feature.

#[cfg(all(not(feature = "std"), not(feature = "libm")))]
compile_error!("`gemath` built without `std` requires feature `libm` for floating-point math. Try: --no-default-features --features libm (and optionally alloc).");

#[inline]
pub fn sqrt(x: f32) -> f32 {
    #[cfg(feature = "std")]
    {
        x.sqrt()
    }
    #[cfg(all(not(feature = "std"), feature = "libm"))]
    {
        libm::sqrtf(x)
    }
}

#[inline]
pub fn sin(x: f32) -> f32 {
    #[cfg(feature = "std")]
    {
        x.sin()
    }
    #[cfg(all(not(feature = "std"), feature = "libm"))]
    {
        libm::sinf(x)
    }
}

#[inline]
pub fn cos(x: f32) -> f32 {
    #[cfg(feature = "std")]
    {
        x.cos()
    }
    #[cfg(all(not(feature = "std"), feature = "libm"))]
    {
        libm::cosf(x)
    }
}

#[inline]
pub fn sin_cos(x: f32) -> (f32, f32) {
    #[cfg(feature = "std")]
    {
        x.sin_cos()
    }
    #[cfg(all(not(feature = "std"), feature = "libm"))]
    {
        (libm::sinf(x), libm::cosf(x))
    }
}

#[inline]
pub fn tan(x: f32) -> f32 {
    #[cfg(feature = "std")]
    {
        x.tan()
    }
    #[cfg(all(not(feature = "std"), feature = "libm"))]
    {
        libm::tanf(x)
    }
}

#[inline]
pub fn acos(x: f32) -> f32 {
    #[cfg(feature = "std")]
    {
        x.acos()
    }
    #[cfg(all(not(feature = "std"), feature = "libm"))]
    {
        libm::acosf(x)
    }
}

#[inline]
pub fn asin(x: f32) -> f32 {
    #[cfg(feature = "std")]
    {
        x.asin()
    }
    #[cfg(all(not(feature = "std"), feature = "libm"))]
    {
        libm::asinf(x)
    }
}

#[inline]
pub fn atan2(y: f32, x: f32) -> f32 {
    #[cfg(feature = "std")]
    {
        y.atan2(x)
    }
    #[cfg(all(not(feature = "std"), feature = "libm"))]
    {
        libm::atan2f(y, x)
    }
}

#[inline]
pub fn exp(x: f32) -> f32 {
    #[cfg(feature = "std")]
    {
        x.exp()
    }
    #[cfg(all(not(feature = "std"), feature = "libm"))]
    {
        libm::expf(x)
    }
}

#[inline]
pub fn floor(x: f32) -> f32 {
    #[cfg(feature = "std")]
    {
        x.floor()
    }
    #[cfg(all(not(feature = "std"), feature = "libm"))]
    {
        libm::floorf(x)
    }
}

#[inline]
pub fn ceil(x: f32) -> f32 {
    #[cfg(feature = "std")]
    {
        x.ceil()
    }
    #[cfg(all(not(feature = "std"), feature = "libm"))]
    {
        libm::ceilf(x)
    }
}

#[inline]
pub fn copysign(x: f32, sign: f32) -> f32 {
    #[cfg(feature = "std")]
    {
        x.copysign(sign)
    }
    #[cfg(all(not(feature = "std"), feature = "libm"))]
    {
        libm::copysignf(x, sign)
    }
}