64 lines
2.3 KiB
C++
64 lines
2.3 KiB
C++
#pragma once
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/*-------------------------------------------------------------
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iwa_noise1234.h
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Identical to a public domain code "noise1234.h" by Stefan Gustavson.
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Just changed file name for handling of files.
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-------------------------------------------------------------*/
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/*-- The original code starts here --*/
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// Noise1234
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// Author: Stefan Gustavson (stegu@itn.liu.se)
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//
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// This library is public domain software, released by the author
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// into the public domain in February 2011. You may do anything
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// you like with it. You may even remove all attributions,
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// but of course I'd appreciate it if you kept my name somewhere.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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/** \file
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\brief Declares the Noise1234 class for producing Perlin noise.
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\author Stefan Gustavson (stegu@itn.liu.se)
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*/
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/*
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* This is a clean, fast, modern and free Perlin noise class in C++.
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* Being a stand-alone class with no external dependencies, it is
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* highly reusable without source code modifications.
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*
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* Note:
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* Replacing the "float" type with "double" can actually make this run faster
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* on some platforms. A templatized version of Noise1234 could be useful.
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*/
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class Noise1234 {
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public:
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Noise1234() {}
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~Noise1234() {}
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/** 1D, 2D, 3D and 4D float Perlin noise, SL "noise()"
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*/
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static float noise(float x);
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static float noise(float x, float y);
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static float noise(float x, float y, float z);
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static float noise(float x, float y, float z, float w);
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/** 1D, 2D, 3D and 4D float Perlin periodic noise, SL "pnoise()"
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*/
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static float pnoise(float x, int px);
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static float pnoise(float x, float y, int px, int py);
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static float pnoise(float x, float y, float z, int px, int py, int pz);
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static float pnoise(float x, float y, float z, float w, int px, int py,
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int pz, int pw);
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private:
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static unsigned char perm[];
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static float grad(int hash, float x);
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static float grad(int hash, float x, float y);
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static float grad(int hash, float x, float y, float z);
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static float grad(int hash, float x, float y, float z, float t);
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};
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