00001 /* 00002 Copyright (c) 2010, The Barbarian Group 00003 All rights reserved. 00004 00005 Redistribution and use in source and binary forms, with or without modification, are permitted provided that 00006 the following conditions are met: 00007 00008 * Redistributions of source code must retain the above copyright notice, this list of conditions and 00009 the following disclaimer. 00010 * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and 00011 the following disclaimer in the documentation and/or other materials provided with the distribution. 00012 00013 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED 00014 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 00015 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR 00016 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 00017 TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00018 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00019 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00020 POSSIBILITY OF SUCH DAMAGE. 00021 */ 00022 00023 #pragma once 00024 00025 #include "cinder/Cinder.h" 00026 #include "cinder/Vector.h" 00027 00028 namespace cinder { 00029 00030 class Perlin 00031 { 00032 public: 00033 Perlin( uint8_t aOctaves = 4 ); 00034 Perlin( uint8_t aOctaves, int32_t aSeed ); 00035 00036 void setSeed( int32_t aSeed ); 00037 uint8_t getOctaves() const { return mOctaves; } 00038 void setOctaves( uint8_t aOctaves ) { mOctaves = aOctaves; } 00039 00041 float fBm( float v ) const; 00042 float fBm( const Vec2f &v ) const; 00043 float fBm( float x, float y ) const { return fBm( Vec2f( x, y ) ); } 00044 float fBm( const Vec3f &v ) const; 00045 float fBm( float x, float y, float z ) const { return fBm( Vec3f( x, y, z ) ); } 00046 00048 // float dfBm( float v ) const; 00049 Vec2f dfBm( const Vec2f &v ) const; 00050 Vec2f dfBm( float x, float y ) const { return dfBm( Vec2f( x, y ) ); } 00051 Vec3f dfBm( const Vec3f &v ) const; 00052 Vec3f dfBm( float x, float y, float z ) const { return dfBm( Vec3f( x, y, z ) ); } 00053 00055 float noise( float x ) const; 00056 float noise( float x, float y ) const; 00057 float noise( float x, float y, float z ) const; 00058 00060 // float dnoise( float x ) const; 00061 Vec2f dnoise( float x, float y ) const; 00062 Vec3f dnoise( float x, float y, float z ) const; 00063 00064 private: 00065 void initPermutationTable(); 00066 00067 float grad( int32_t hash, float x ) const; 00068 float grad( int32_t hash, float x, float y ) const; 00069 float grad( int32_t hash, float x, float y, float z ) const; 00070 00071 uint8_t mOctaves; 00072 int32_t mSeed; 00073 00074 uint8_t mPerms[512]; 00075 }; 00076 00077 } // namespace cinder