BetterFps

BetterFps

Mods
91M Downloads

Fast inverse Square root

DesWurstes opened this issue ยท 3 comments

commented

Thanks for the suggestion, but Minecraft vanilla already uses this algorithm.

commented

Are you sure? See: net.minecraft.util.math.MathHelper

    public static float sqrt(double value)
    {
        return (float)Math.sqrt(value);
    }

Also, please add a license to your project.

commented

Yes, I'm sure. See: net.minecraft.util.math.MathHelper#fastInvSqrt

    public static double fastInvSqrt(double p_181161_0_)
    {
        double d0 = 0.5D * p_181161_0_;
        long i = Double.doubleToRawLongBits(p_181161_0_);
        i = 6910469410427058090L - (i >> 1);
        p_181161_0_ = Double.longBitsToDouble(i);
        p_181161_0_ = p_181161_0_ * (1.5D - d0 * p_181161_0_ * p_181161_0_);
        return p_181161_0_;
    }

The algorithm only applies to inverse square roots, not regular ones.

It is licensed as you can see here.