/usr/include/cal3d/matrix.h is in libcal3d12-dev 0.11.0-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// matrix.h //
// Copyright (C) 2001, 2002 Bruno 'Beosil' Heidelberger //
//****************************************************************************//
// 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. //
//****************************************************************************//
#ifndef CAL_MATRIX_H
#define CAL_MATRIX_H
//****************************************************************************//
// Includes //
//****************************************************************************//
#include "cal3d/global.h"
//****************************************************************************//
// Forward declarations //
//****************************************************************************//
class CalQuaternion;
//****************************************************************************//
// Class declaration //
//****************************************************************************//
/*****************************************************************************/
/** The matrix class.
*****************************************************************************/
class CAL3D_API CalMatrix
{
// member variables
public:
float dxdx,dydx,dzdx;
float dxdy,dydy,dzdy;
float dxdz,dydz,dzdz;
// constructors/destructor
public:
inline CalMatrix() : dxdx(0.0), dydx(0.0), dzdx(0.0),
dxdy(0.0), dydy(0.0), dzdy(0.0),
dxdz(0.0), dydz(0.0), dzdz(0.0)
{
}
CalMatrix(const CalQuaternion &q);
inline CalMatrix(float weight, const CalMatrix &m)
{
dxdx = m.dxdx*weight;
dxdy = m.dxdy*weight;
dxdz = m.dxdz*weight;
dydx = m.dydx*weight;
dydy = m.dydy*weight;
dydz = m.dydz*weight;
dzdx = m.dzdx*weight;
dzdy = m.dzdy*weight;
dzdz = m.dzdz*weight;
}
inline ~CalMatrix() {};
// member functions
public:
void operator=(const CalQuaternion& q);
inline void operator=(const CalMatrix& m)
{
dxdx=m.dxdx; dxdy=m.dxdy; dxdz=m.dxdz;
dydx=m.dydx; dydy=m.dydy; dydz=m.dydz;
dzdx=m.dzdx; dzdy=m.dzdy; dzdz=m.dzdz;
}
inline void operator *= (const CalMatrix &m)
{
float ndxdx=m.dxdx*dxdx+m.dxdy*dydx+m.dxdz*dzdx;
float ndydx=m.dydx*dxdx+m.dydy*dydx+m.dydz*dzdx;
float ndzdx=m.dzdx*dxdx+m.dzdy*dydx+m.dzdz*dzdx;
float ndxdy=m.dxdx*dxdy+m.dxdy*dydy+m.dxdz*dzdy;
float ndydy=m.dydx*dxdy+m.dydy*dydy+m.dydz*dzdy;
float ndzdy=m.dzdx*dxdy+m.dzdy*dydy+m.dzdz*dzdy;
float ndxdz=m.dxdx*dxdz+m.dxdy*dydz+m.dxdz*dzdz;
float ndydz=m.dydx*dxdz+m.dydy*dydz+m.dydz*dzdz;
float ndzdz=m.dzdx*dxdz+m.dzdy*dydz+m.dzdz*dzdz;
dxdx=ndxdx;
dydx=ndydx;
dzdx=ndzdx;
dxdy=ndxdy;
dydy=ndydy;
dzdy=ndzdy;
dxdz=ndxdz;
dydz=ndydz;
dzdz=ndzdz;
}
inline void operator *= (float factor)
{
dxdx *= factor;
dydx *= factor;
dzdx *= factor;
dxdy *= factor;
dydy *= factor;
dzdy *= factor;
dxdz *= factor;
dydz *= factor;
dzdz *= factor;
}
inline void blend(float factor, const CalMatrix& m)
{
dxdx += m.dxdx*factor;
dydx += m.dydx*factor;
dzdx += m.dzdx*factor;
dxdy += m.dxdy*factor;
dydy += m.dydy*factor;
dzdy += m.dzdy*factor;
dxdz += m.dxdz*factor;
dydz += m.dydz*factor;
dzdz += m.dzdz*factor;
}
inline float det()
{
return dxdx * (dydy*dzdz-dydz*dzdy)
-dxdy* ( dydx*dzdz-dzdx*dydz)
+dxdz* (dydx*dzdy-dzdx*dydy);
}
};
#endif
//****************************************************************************//
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