1 // invert.h 2 // 3 // Copyright (C) 2003, 2004 Jason Bevins 4 // 5 // This library is free software; you can redistribute it and/or modify it 6 // under the terms of the GNU Lesser General Public License as published by 7 // the Free Software Foundation; either version 2.1 of the License, or (at 8 // your option) any later version. 9 // 10 // This library is distributed in the hope that it will be useful, but WITHOUT 11 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 13 // License (COPYING.txt) for more details. 14 // 15 // You should have received a copy of the GNU Lesser General Public License 16 // along with this library; if not, write to the Free Software Foundation, 17 // Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 // 19 // The developer's email is jlbezigvins@gmzigail.com (for great email, take 20 // off every 'zig'.) 21 // 22 module noise.mod.invert; 23 24 private { 25 import noise.mod.modulebase; 26 } 27 28 /// @addtogroup libnoise 29 /// @{ 30 31 /// @addtogroup modules 32 /// @{ 33 34 /// @addtogroup modifiermodules 35 /// @{ 36 37 /// Noise module that inverts the output value from a source module. 38 /// 39 /// @image html moduleinvert.png 40 /// 41 /// This noise module requires one source module. 42 class Invert : Mod 43 { 44 45 public: 46 47 /// Constructor. 48 this() 49 { 50 super(this.GetSourceModCount()); 51 } 52 53 override int GetSourceModCount () const 54 { 55 return 1; 56 } 57 58 override double GetValue (double x, double y, double z) const 59 { 60 assert (m_pSourceMod[0] !is null); 61 62 return -(m_pSourceMod[0].GetValue (x, y, z)); 63 } 64 65 }; 66 67 /// @} 68 69 /// @} 70 71 /// @}