//
//  KRTriangle.h
//  KREngine
//
//  Copyright 2012 Kearwood Gilbert. All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without modification, are
//  permitted provided that the following conditions are met:
//
//  1. Redistributions of source code must retain the above copyright notice, this list of
//  conditions and the following disclaimer.
//
//  2. Redistributions in binary form must reproduce the above copyright notice, this list
//  of conditions and the following disclaimer in the documentation and/or other materials
//  provided with the distribution.
//
//  THIS SOFTWARE IS PROVIDED BY KEARWOOD GILBERT ''AS IS'' AND ANY EXPRESS OR IMPLIED
//  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
//  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KEARWOOD GILBERT OR
//  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
//  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
//  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
//  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
//  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
//  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//  The views and conclusions contained in the software and documentation are those of the
//  authors and should not be interpreted as representing official policies, either expressed
//  or implied, of Kearwood Gilbert.
//

#ifndef KRTRIANGLE3_H
#define KRTRIANGLE3_H

#include "KRVector3.h"

class KRTriangle3
{
public:
    KRTriangle3(const KRTriangle3 &tri);
    KRTriangle3(const KRVector3 &v1, const KRVector3 &v2, const KRVector3 &v3);
    ~KRTriangle3();
    
    KRVector3 calculateNormal() const;
    
    bool operator ==(const KRTriangle3& b) const;
    bool operator !=(const KRTriangle3& b) const;
    KRTriangle3& operator =(const KRTriangle3& b);
    KRVector3& operator[](unsigned i);
    KRVector3 operator[](unsigned i) const;
    
    
    bool rayCast(const KRVector3 &start, const KRVector3 &dir, KRVector3 &hit_point) const;
    bool sphereCast(const KRVector3 &start, const KRVector3 &dir, float radius, KRVector3 &hit_point, float &hit_distance) const;
    
    bool containsPoint(const KRVector3 &p) const;
    KRVector3 closestPointOnTriangle(const KRVector3 &p) const;
private:
    
    KRVector3 m_c[3];
};

#endif // KRTRIANGLE3_H
