cleaned Texture interface new C++ demo: textures slightly adjusted SAH for kd-tree slightly optimized kd-tree building -- moved termination cond. so it's tested before recursion minor sphere intersection optimization

/*
 * Pyrit Ray Tracer
 * file: noise.h
 *
 * Radek Brich, 2006-2007
 */

#ifndef NOISE_H
#define NOISE_H

#include "common.h"

Float perlin(Float x, Float y, Float z);

#endif