Triangle.h

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D 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.
//
//    Scorched3D 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 Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////


// Triangle.h: interface for the Triangle class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_TRIANGLE_H__B076B031_36ED_11D3_BE80_000000000000__INCLUDED_)
#define AFX_TRIANGLE_H__B076B031_36ED_11D3_BE80_000000000000__INCLUDED_

#include <common/Line.h>

class Triangle
{
public:
        Triangle();
        virtual ~Triangle();

        Vector &getNormal() { return faceN_; }

        void setPointComponents(const float ptA1, const float ptA2, const float ptA3, 
                Vector &normalA,
                const float ptB1, const float ptB2, const float ptB3, 
                Vector &normalB,
                const float ptC1, const float ptC2, const float ptC3,
                Vector &normalC);

        bool pointInBoundingBox(const Vector &pt);
        bool pointInTriangle(const Vector &pt);

        virtual bool rayIntersect(
                const Line &ray, 
                Vector &intersectPt, 
                Vector &intersectN,
                float &intersectDist,
                const bool checkPtOnLine = true);

        virtual bool sphereIntersect(
                Vector &sphereCentre, 
                float &sphereRadius,
                Vector &intersectPt,
                Vector &intersectN,
                float &intersectDist);

protected:      
        enum largestNormalPart 
        { 
                scalarX, 
                scalarY, 
                scalarZ 
        } largest_;

        Vector ptA_, ptB_, ptC_;
        Vector faceN_;

        void calcNormal();
        void calcLargest();
};

#endif // !defined(AFX_TRIANGLE_H__B076B031_36ED_11D3_BE80_000000000000__INCLUDED_)

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