/* Copyright (c) <2003-2011> <Julio Jerez, Newton Game Dynamics>
* 
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
* 
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
* 
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 
* 3. This notice may not be removed or altered from any source distribution.
*/

#ifndef __dgMeshEffectSolidTree_H__
#define __dgMeshEffectSolidTree_H__

#include <dgRefCounter.h>

class dgMeshEffect;
class dgMeshTreeCSGFace;
class dgMeshEffectSolidTree;


class dgMeshEffectSolidTree
{
	public:
	DG_CLASS_ALLOCATOR(allocator)

	enum dgPlaneType
	{
		m_divider = 1,
		m_empty,
		m_solid,
	};

	dgMeshEffectSolidTree (dgPlaneType type);
	dgMeshEffectSolidTree (const dgMeshEffect& mesh, dgEdge* const face);
	dgMeshEffectSolidTree (const dgHugeVector& plane, dgMemoryAllocator* const allocator);
	~dgMeshEffectSolidTree();

	dgHugeVector BuildPlane (const dgMeshEffect& mesh, dgEdge* const face) const;
	void AddFace (const dgMeshEffect& mesh, dgEdge* const face);

	dgPlaneType GetPointSide (const dgHugeVector& point) const;
	dgPlaneType GetFaceSide (const dgMeshTreeCSGFace* const face) const;

	dgPlaneType m_planeType;
	dgMeshEffectSolidTree* m_back;
	dgMeshEffectSolidTree* m_front;
	dgHugeVector m_plane;
};



class dgMeshTreeCSGFace: public dgList<dgHugeVector>, public dgRefCounter 
{
	public:
	dgMeshTreeCSGFace (const dgMeshEffect& mesh, dgEdge* const face);
	dgMeshTreeCSGFace (dgMemoryAllocator* const allocator, dgInt32 count, const dgHugeVector* const points);

	void Clip (const dgHugeVector& plane, dgMeshTreeCSGFace** leftOut, dgMeshTreeCSGFace** rightOut);
	void MergeMissingVertex (const dgMeshTreeCSGFace* const face);
	bool IsPointOnEdge (const dgHugeVector& p0, const dgHugeVector& p1, const dgHugeVector& q) const;
	bool CheckFaceArea (dgInt32 count, const dgHugeVector* const points) const;
	dgInt32 RemoveDuplicates (dgInt32 count, dgHugeVector* const points) const;

	dgHugeVector FaceNormal () const;

	bool CheckConvex(const dgHugeVector& normal) const;

#ifdef _DEBUG
	dgMatrix DebugMatrix () const;
	void Trace (const dgMatrix& matrix) const;
#endif

	dgMeshEffectSolidTree::dgPlaneType m_side;
};

#endif
