K3dFaceWork.cpp

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/***************************************************************************
 *   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 "K3dFaceWork.h"

K3dFaceWork::K3dFaceWork(K3dGameData *_pGameData)
{
        m_pGameData = _pGameData;
}

K3dFaceWork::~K3dFaceWork()
{
}

void K3dFaceWork::CalcCentre()
{
        int iNumVerts = (int) GetVertexArray().size();
        for(int i=0; i<iNumVerts; i++)
        {
                K3dVertex *pVertex = GetVertexArray()[i];
                // Add x scalar of cetre position
                GetCentre()->GetX() += pVertex->GetPosition()->GetX();
                // Add y scalar of cetre position
                GetCentre()->GetY() += pVertex->GetPosition()->GetY();
                // Add z scalar of cetre position
                GetCentre()->GetZ() += pVertex->GetPosition()->GetZ();
        }
        
        // Calculate result cetre of face
        if(iNumVerts)
        {
                GetCentre()->GetX() = GetCentre()->GetX() / iNumVerts;
                GetCentre()->GetY() = GetCentre()->GetY() / iNumVerts;
                GetCentre()->GetZ() = GetCentre()->GetZ() / iNumVerts;
        }
}

void K3dFaceWork::CalcNormal()
{
        int iNumVerts = (int) GetVertexArray().size();
        // Get only first 3 vertices
        K3dVector3Obj akVertex[3];
        if(iNumVerts >= 3)
        {
                for(int i=0; i<3; i++)
                {
                        K3dVertex *pVertex = GetVertexArray()[i];
                        // Add x scalar of cetre position
                        akVertex[i] = *pVertex->GetPosition();
                }
        }
        else
        {
                cout << "K3dVector3 &K3dFaceBuild::CalcNormal() -- Number of vertices is: " << iNumVerts << " The minimum requierement are 3 vertices" << endl;
        }
        
        // Calculate normal vector
        *GetNormal() = m_pGameData->GetVector3Work()->Normal( akVertex[0], akVertex[1], akVertex[2]);
}

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