/usr/include/wfmath-1.0/wfmath/zero.h is in libwfmath-1.0-dev 1.0.2+dfsg1-4.
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// Copyright (C) 2009 The WorldForge Project
//
// Author: Erik Hjortsberg <erik@worlforge.org, (C) 2009
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// For information about WorldForge and its authors, please contact
// the Worldforge Web Site at http://www.worldforge.org.
#ifndef WFMATH_ZERO_H
#define WFMATH_ZERO_H
namespace WFMath {
/**
@brief Utility class for providing zero primitives. This class will only work with simple structures such as Vector or Point which provide a m_elem structure.
In order for it to access the m_elem structure it must be declared as a friend class of the class it will provide an instance of.
@author Erik Hjortsberg <erik@worldforge.org>
*/
template<typename Shape>
class ZeroPrimitive
{
public:
/**
@brief Ctor.
An instance of Shape with zero values will be created at construction time.
@param dim The dimensions of the shape.
*/
ZeroPrimitive(int dim) : m_shape()
{
for (int i = 0; i < dim; ++i) {
m_shape.m_elem[i] = 0;
}
m_shape.m_valid = true;
}
/**
@brief Gets the zeroed shape.
*/
const Shape& getShape() const
{
return m_shape;
}
private:
/**
@brief The interal zeroed shape.
*/
Shape m_shape;
};
}
#endif //WFMATH_ZERO_H
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