GeneralsZeroHour/GeneralsMD/Code/GameEngine/Include/Common/BezierSegment.h

/*
**	Command & Conquer Generals Zero Hour(tm)
**	Copyright 2025 Electronic Arts Inc.
**
**	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 3 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, see <http://www.gnu.org/licenses/>.
*/

////////////////////////////////////////////////////////////////////////////////
//																																						//
//  (c) 2001-2003 Electronic Arts Inc.																				//
//																																						//
////////////////////////////////////////////////////////////////////////////////

// BezierSegment.h ////////////////////////////////////////////////////////////////////////////////
// John K McDonald, Jr.
// September 2002
// DO NOT DISTRIBUTE

#pragma once
#ifndef __BEZIERSEGMENT_H__
#define __BEZIERSEGMENT_H__

#include <D3DX8Math.h>
#include "Common/STLTypeDefs.h"

#define USUAL_TOLERANCE 1.0f

class BezierSegment
{
	protected:
		static const D3DXMATRIX s_bezBasisMatrix;
		Coord3D m_controlPoints[4];

	public:	// Constructors
		BezierSegment();
		BezierSegment(Real x0, Real y0, Real z0,
									Real x1, Real y1, Real z1,
									Real x2, Real y2, Real z2,
									Real x3, Real y3, Real z3);

		BezierSegment(Real cp[16]);


		BezierSegment(const Coord3D& cp0, 
									const Coord3D& cp1, 
									const Coord3D& cp2, 
									const Coord3D& cp3);

		BezierSegment(Coord3D cp[4]);

	public:
		void evaluateBezSegmentAtT(Real tValue, Coord3D *outResult) const;
		void getSegmentPoints(Int numSegments, VecCoord3D *outResult) const;
		Real getApproximateLength(Real withinTolerance = USUAL_TOLERANCE) const;

		void splitSegmentAtT(Real tValue, BezierSegment &outSeg1, BezierSegment &outSeg2) const;

	public:	// He get's friendly access.
		friend class BezFwdIterator;
};

#endif /* __BEZIERSEGMENT_H__ */