namespace Syntriax.Engine.Core;

public static class FloatExtensions
{
    public static bool ApproximatelyEquals(this float a, float b)
        => ApproximatelyEquals(a, b, float.Epsilon);
    public static bool ApproximatelyEquals(this float a, float b, float epsilon)
    {
        if (a == b)
            return true;

        const float floatNormal = (1 << 23) * float.Epsilon;
        float absA = Math.Abs(a);
        float absB = Math.Abs(b);
        float diff = Math.Abs(a - b);

        if (a == 0.0f || b == 0.0f || diff < floatNormal)
            return diff < (epsilon * floatNormal);

        return diff / Math.Min(absA + absB, float.MaxValue) < epsilon;
    }
}