NiMath.h

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#pragma once
 
namespace RE
{
    constexpr float NI_INFINITY = FLT_MAX;
    constexpr float NI_PI = static_cast<float>(3.1415926535897932);
    constexpr float NI_HALF_PI = 0.5F * NI_PI;
    constexpr float NI_TWO_PI = 2.0F * NI_PI;
 
    inline float deg_to_rad(float a_degrees)
    {
        return a_degrees * (NI_PI / 180.0f);
    }
 
    inline float rad_to_deg(float a_radians)
    {
        return a_radians * (180.0f / NI_PI);
    }
 
    inline float normalize_angle(float a_radians)
    {
        float a = std::fmodf(a_radians + NI_PI, 2 * NI_PI);
        return a >= 0.0f ? (a - NI_PI) : (a + NI_PI);
    }
 
    float NiAbs(float a_value);
    float NiASin(float a_value);
    float NiFastATan2(float a_y, float a_x);
}