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/*
** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
#include <cstring>
#include "Core/precomp.h"
#include "API/Core/Math/matrix4x4.h"
/////////////////////////////////////////////////////////////////////////////
// CL_Matrix4x4 construction:
CL_Matrix4x4::CL_Matrix4x4(bool identity)
{
memset(matrix, 0, sizeof(double[16]));
if (identity)
{
matrix[0] = 1.0;
matrix[5] = 1.0;
matrix[10] = 1.0;
matrix[15] = 1.0;
}
}
CL_Matrix4x4::CL_Matrix4x4(const CL_Matrix4x4 ©)
{
for (int i=0; i<16; i++)
matrix[i] = copy.matrix[i];
}
CL_Matrix4x4::CL_Matrix4x4(double *init_matrix)
{
for (int i=0; i<16; i++)
matrix[i] = init_matrix[i];
}
CL_Matrix4x4::CL_Matrix4x4(float *init_matrix)
{
for (int i=0; i<16; i++)
matrix[i] = (double) init_matrix[i];
}
/////////////////////////////////////////////////////////////////////////////
// CL_Matrix4x4 attributes:
double CL_Matrix4x4::get_origin_x() const
{
return matrix[12];
}
double CL_Matrix4x4::get_origin_y() const
{
return matrix[13];
}
double CL_Matrix4x4::get_origin_z() const
{
return matrix[14];
}
/////////////////////////////////////////////////////////////////////////////
// CL_Matrix4x4 operations:
bool CL_Matrix4x4::operator==(const CL_Matrix4x4 &other) const
{
for (int i=0; i<16; i++)
if (matrix[i] != other.matrix[i]) return false;
return true;
}
bool CL_Matrix4x4::operator!=(const CL_Matrix4x4 &other) const
{
for (int i=0; i<16; i++)
if (matrix[i] != other.matrix[i]) return true;
return false;
}
CL_Matrix4x4 &CL_Matrix4x4::operator =(const CL_Matrix4x4 ©)
{
for (int i=0; i<16; i++)
matrix[i] = copy.matrix[i];
return *this;
}
CL_Matrix4x4 CL_Matrix4x4::multiply(const CL_Matrix4x4 &mult) const
{
CL_Matrix4x4 result;
for (int x=0; x<4; x++)
{
for (int y=0; y<4; y++)
{
result.matrix[x+y*4] =
matrix[x]*mult.matrix[y*4] +
matrix[x+4]*mult.matrix[y*4+1] +
matrix[x+8]*mult.matrix[y*4+2] +
matrix[x+12]*mult.matrix[y*4+3];
}
}
return result;
}
/////////////////////////////////////////////////////////////////////////////
// CL_Matrix4x4 implementation:
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