////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2011, 2026
//
//    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 this program; if not, write to the Free Software Foundation, Inc.,
//    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
////////////////////////////////////////////////////////////////////////////////

#ifndef __INCLUDE_Triangle_hpp_INCLUDE__
#define __INCLUDE_Triangle_hpp_INCLUDE__

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

#include <common/Line.hpp>

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  // __INCLUDE_Triangle_hpp_INCLUDE__
