namespace AForge.Imaging;

internal static class Interpolation
{
	public static double BiCubicKernel(double x)
	{
		if (x < 0.0)
		{
			x = 0.0 - x;
		}
		double result = 0.0;
		if (x <= 1.0)
		{
			result = (1.5 * x - 2.5) * x * x + 1.0;
		}
		else if (x < 2.0)
		{
			result = ((-0.5 * x + 2.5) * x - 4.0) * x + 2.0;
		}
		return result;
	}
}