/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, 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/>.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/

#ifndef plInterMeshSmooth_inc
#define plInterMeshSmooth_inc

#include "hsTemplates.h"

class plDrawableSpans;
struct hsPoint3;
struct hsVector3;

class plSpanHandle
{
public:
	plDrawableSpans*		fDrawable;
	UInt32					fSpanIdx;
};

class plInterMeshSmooth
{
protected:
	hsScalar		fMinNormDot;

	void			FindEdges(UInt32 maxVtxIdx, UInt32 nTris, UInt16* idxList, hsTArray<UInt16>& edgeVerts);
	void			FindEdges(hsTArray<plSpanHandle>& sets, hsTArray<UInt16>* edgeVerts);
	void			FindSharedVerts(hsPoint3& searchPos, plSpanHandle& set, hsTArray<UInt16>& edgeVerts, hsTArray<UInt16>& shareVtx, hsVector3& normAccum);
	void			SetNormals(plSpanHandle& set, hsTArray<UInt16>& shareVtx, hsVector3& norm);
	hsPoint3&		GetPosition(plSpanHandle& set, UInt16 idx);
	hsVector3&		GetNormal(plSpanHandle& set, UInt16 idx);

public:
	plInterMeshSmooth() : fMinNormDot(0.25f) {}

	void		SetAngle(hsScalar degs);
	hsScalar	GetAngle() const; // returns degrees

	void		SmoothNormals(hsTArray<plSpanHandle>& sets);
};

#endif // plInterMeshSmooth_inc