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105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program 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
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef NL_NOISE_VALUE_H
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#define NL_NOISE_VALUE_H
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#include "types_nl.h"
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#include "vector.h"
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#include "stream.h"
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#include "rgba.h"
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namespace NLMISC
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{
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// ***************************************************************************
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/**
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* A class which generate noisy value, according to a position
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* \author Lionel Berenguier
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* \author Nevrax France
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* \date 2001
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*/
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class CNoiseValue
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{
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public:
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float Abs;
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float Rand;
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float Frequency;
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public:
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/// Default to 0, 1, 1.
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CNoiseValue();
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CNoiseValue(float abs, float rand, float freq);
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/** return Abs + Rand* noise(Pos*Frequency). with noise() E [0..1].
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* Warning! Use OptFastFloor()! So call must be enclosed with a OptFastFloorBegin()/OptFastFloorEnd().
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*/
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float eval(const CVector &posInWorld) const;
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/** same as eval, but eval just one random level for noise() => act much more like a random.
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* Warning! Use OptFastFloor()! So call must be enclosed with a OptFastFloorBegin()/OptFastFloorEnd().
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*/
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float evalOneLevelRandom(const CVector &posInWorld) const;
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void serial(IStream &f);
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// *******************
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private:
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/// pos scale is in [0..1]
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float noise(const CVector &pos) const;
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float evalRandom(const CVector &pos) const;
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};
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// ***************************************************************************
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/**
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* A noisy color generator
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* \author Lionel Berenguier
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* \author Nevrax France
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* \date 2001
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*/
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class CNoiseColorGradient
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{
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public:
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/// Abs and Rand should be 0 and 1 here. If not, some colors may not be generated...
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CNoiseValue NoiseValue;
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std::vector<CRGBAF> Gradients;
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public:
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/** Use NoiseValue to compute a PerlinNoise E [0..1], and peek in Gradients, with linear interpolation.
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* result unmodified if no colors. If only one color, copied into result.
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* Warning! Use OptFastFloor()! So call must be enclosed with a OptFastFloorBegin()/OptFastFloorEnd().
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*/
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void eval(const CVector &posInWorld, CRGBAF &result) const;
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void serial(IStream &f);
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};
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} // NL3D
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#endif // NL_NOISE_VALUE_H
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/* End of noise_value.h */
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