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/*
math/matrix4f.cc
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#include <cstring>
#include <cmath>
#include "math/matrix4f.h"
namespace math
{
Matrix4f::Matrix4f()
{
clear();
}
Matrix4f::Matrix4f(const Matrix4f & other)
{
assign(other);
}
Matrix4f::Matrix4f(const Axis & axis)
{
assign(axis);
}
void Matrix4f::clear()
{
memset(_matrix, 0, sizeof(float) * 16);
}
void Matrix4f::unity()
{
memset(_matrix, 0, sizeof(float) * 16);
for (int i = 0; i < 4; i++)
{
_matrix[i][i] = 1;
}
}
void Matrix4f::assign(const Matrix4f & other)
{
memcpy(_matrix, other._matrix, sizeof(float) * 16);
}
void Matrix4f::assign(const Axis & axis)
{
for (int i = 0; i < 3; i++) {
memcpy(&_matrix[i][0], axis[i].ptr(), sizeof(float) * 3);
}
_matrix[0][3] = 0;
_matrix[1][3] = 0;
_matrix[2][3] = 0;
_matrix[3][0] = 0;
_matrix[3][1] = 0;
_matrix[3][2] = 0;
_matrix[3][3] = 1;
}
Matrix4f & Matrix4f::operator=(const Matrix4f &other)
{
assign(other);
return(*this);
}
Matrix4f & Matrix4f::operator=(const Axis & axis)
{
assign(axis);
return(*this);
}
const Matrix4f Matrix4f::transpose() const
{
Matrix4f t;
for (size_t i = 0; i < 4; i++)
{
for (size_t j = 0; j < 4; j++)
{
t._matrix[j][i] = _matrix[i][j];
}
}
return t;
}
}
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