Fewes

#ifndef TRICUBIC_INCLUDED
#define TRICUBIC_INCLUDED

float4 Cubic(float v)
{
	float4 n = float4(1.0, 2.0, 3.0, 4.0) - v;
	float4 s = n * n * n;
	float x = s.x;
	float y = s.y - 4.0 * s.x;
	float z = s.z - 4.0 * s.y + 6.0 * s.x;