K3dTriangleWork.cpp

Go to the documentation of this file.

/***************************************************************************
 *   Copyright (C) 2007 by Jan Koci   *
 *   honza.koci@email.cz   *
 *   http://kengine.sourceforge.net/tutorial/
 *                                                                         *
 *   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.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#include "K3dTriangleWork.h"

K3dTriangleWork::K3dTriangleWork(K3dGameData *_pGameData)
{
        m_pGameData = _pGameData;
        // Set this pointer to the game data
        m_pGameData->SetTriangleWork(this);
}

K3dTriangleWork::~K3dTriangleWork(void)
{
}

K3dVector3Obj &K3dTriangleWork::CalcTriangleCentre(const int _iTriangleId)
{
        // Get triangle from global data
        K3dTriangleObj *pTriangle =  m_pGameData->GetTriangleObjSP().Get(_iTriangleId);
        *pTriangle->GetCentre() = m_pGameData->GetVector3Work()->CalcCentre(*pTriangle->GetVertex(0), *pTriangle->GetVertex(1), *pTriangle->GetVertex(2));

        return *pTriangle->GetCentre();
}

void K3dTriangleWork::CalcScale(const int _iTriangleId, const float fDistance)
{
        // Triangle center
        K3dVector3Obj t;
        // Directional vectors
        K3dVector3Obj v0dir, v1dir, v2dir;

        // Calculate triangle centre
        t = CalcTriangleCentre(_iTriangleId);

        // Get triangle from global data
        K3dTriangle *pTriangle =  m_pGameData->GetTriangleObjSP().Get(_iTriangleId);
        // Get triangle vertices from global data
        K3dVector3Obj akV[3];
        akV[0] = *pTriangle->GetVertex(0);
        akV[1] = *pTriangle->GetVertex(1);
        akV[2] = *pTriangle->GetVertex(2);
        // Calculate directional vectors
        v0dir = akV[0] - t;
        v1dir = akV[1] - t;
        v2dir = akV[2] - t;
        // Normalize directional vectors
        v0dir = m_pGameData->GetVector3Work()->Normalize(v0dir);
        v1dir = m_pGameData->GetVector3Work()->Normalize(v1dir);
        v2dir = m_pGameData->GetVector3Work()->Normalize(v2dir);
        // Translate current vectors by directional vectors
        m_pGameData->GetVector3Work()->Translate(akV[0], v0dir, fDistance);
        m_pGameData->GetVector3Work()->Translate(akV[1], v1dir, fDistance);
        m_pGameData->GetVector3Work()->Translate(akV[2], v2dir, fDistance);

        *pTriangle->GetVertex(0) = akV[0];
        *pTriangle->GetVertex(1) = akV[1];
        *pTriangle->GetVertex(2) = akV[2];

}

K3dVector3Obj &K3dTriangleWork::CalcNormal(const int _iTriangleId)
{
        // Get triangle from global data
        K3dTriangle *pTriangle =  m_pGameData->GetTriangleObjSP().Get(_iTriangleId);
        *pTriangle->GetNormal() = m_pGameData->GetVector3Work()->Normal(*pTriangle->GetVertex(0), *pTriangle->GetVertex(1), *pTriangle->GetVertex(2));
        return *pTriangle->GetNormal();
}

---