/usr/include/libnoise/module/exponent.h is in libnoise-dev 1.0.0+repack-1.
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//
// Copyright (C) 2003, 2004 Jason Bevins
//
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation; either version 2.1 of the License, or (at
// your option) any later version.
//
// This library is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
// License (COPYING.txt) for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this library; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// The developer's email is jlbezigvins@gmzigail.com (for great email, take
// off every 'zig'.)
//
#ifndef NOISE_MODULE_EXPONENT_H
#define NOISE_MODULE_EXPONENT_H
#include "modulebase.h"
namespace noise
{
namespace module
{
/// @addtogroup libnoise
/// @{
/// @addtogroup modules
/// @{
/// @addtogroup modifiermodules
/// @{
/// Default exponent for the noise::module::Exponent noise module.
const double DEFAULT_EXPONENT = 1.0;
/// Noise module that maps the output value from a source module onto an
/// exponential curve.
///
/// @image html moduleexponent.png
///
/// Because most noise modules will output values that range from -1.0 to
/// +1.0, this noise module first normalizes this output value (the range
/// becomes 0.0 to 1.0), maps that value onto an exponential curve, then
/// rescales that value back to the original range.
///
/// This noise module requires one source module.
class Exponent: public Module
{
public:
/// Constructor.
///
/// The default exponent is set to noise::module::DEFAULT_EXPONENT.
Exponent ();
/// Returns the exponent value to apply to the output value from the
/// source module.
///
/// @returns The exponent value.
///
/// Because most noise modules will output values that range from -1.0
/// to +1.0, this noise module first normalizes this output value (the
/// range becomes 0.0 to 1.0), maps that value onto an exponential
/// curve, then rescales that value back to the original range.
double GetExponent () const
{
return m_exponent;
}
virtual int GetSourceModuleCount () const
{
return 1;
}
virtual double GetValue (double x, double y, double z) const;
/// Sets the exponent value to apply to the output value from the
/// source module.
///
/// @param exponent The exponent value.
///
/// Because most noise modules will output values that range from -1.0
/// to +1.0, this noise module first normalizes this output value (the
/// range becomes 0.0 to 1.0), maps that value onto an exponential
/// curve, then rescales that value back to the original range.
void SetExponent (double exponent)
{
m_exponent = exponent;
}
protected:
/// Exponent to apply to the output value from the source module.
double m_exponent;
};
/// @}
/// @}
/// @}
}
}
#endif
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