CWE-ou-minkata/Sources/Plasma/PubUtilLib/plDrawable/plCutter.h

/*==LICENSE==*

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

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it under the terms of the GNU General Public License as published by
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along with this program. If not, see <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
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*==LICENSE==*/

#ifndef plCutter_inc
#define plCutter_inc

#include "../pnFactory/plCreatable.h"

#include "hsGeometry3.h"
#include "hsTemplates.h"
#include "hsBounds.h"
#include "../plIntersect/plVolumeIsect.h"
#include "hsColorRGBA.h"

struct hsPoint3;
struct hsVector3;

class plPrintCollect;
class plAccTriIterator;
class plAccessSpan;

class plCutoutHit
{
public:
	hsPoint3	fPos;
	hsVector3	fNorm;
};

class plCutoutVtx
{
public:
	plCutoutVtx& Init(const hsPoint3& p, const hsVector3& n, const hsColorRGBA& c) { fPos = p; fNorm = n; fColor = c; return *this; }

	hsPoint3	fPos;
	hsVector3	fNorm;
	hsColorRGBA	fColor;
	hsPoint3	fUVW;
};

class plCutoutPoly
{
public:
	hsTArray<plCutoutVtx>		fVerts;

	hsBool						fBaseHasAlpha;
};

class plCutoutMiniVtx
{
public:
	hsPoint3	fPos;
	hsPoint3	fUVW;
};

class plFlatGridMesh
{
public:
	hsTArray<plCutoutMiniVtx>	fVerts;
	hsTArray<UInt16>			fIdx;

	void Reset() { fVerts.SetCount(0); fIdx.SetCount(0); }
};

class plCutter : public plCreatable
{
protected:

	// Permanent attributes
	hsScalar fLengthU;
	hsScalar fLengthV;
	hsScalar fLengthW;

	// Internal cached stuff
	hsScalar		fDistU;
	hsScalar		fDistV;
	hsScalar		fDistW;
	hsVector3		fDirU;
	hsVector3		fDirV;
	hsVector3		fDirW;
	hsVector3		fBackDir;

	hsBounds3Ext	fWorldBounds;
	plBoundsIsect	fIsect;

	void			IConstruct(hsTArray<plCutoutPoly>& dst, hsTArray<plCutoutVtx>& poly, hsBool baseHasAlpha) const;
	hsBool			IPolyClip(hsTArray<plCutoutVtx>& poly, const hsPoint3 vPos[]) const;
	
	inline void		ICutoutVtxHiU(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
	inline void		ICutoutVtxHiV(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
	inline void		ICutoutVtxHiW(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
	inline void		ICutoutVtxLoU(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
	inline void		ICutoutVtxLoV(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
	inline void		ICutoutVtxLoW(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
	inline void		ICutoutVtxMidV(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
	inline void		ICutoutVtxMidU(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;
	inline void		ICutoutVtxMidW(const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;

	hsBool			IFindHitPoint(const hsTArray<plCutoutVtx>& inPoly, plCutoutHit& hit) const;

	inline void		ISetPosNorm(hsScalar parm, const plCutoutVtx& inVtx, const plCutoutVtx& outVtx, plCutoutVtx& dst) const;

	void			ICutoutTransformed(plAccessSpan& src, hsTArray<plCutoutPoly>& dst) const;
	void			ICutoutConstHeight(plAccessSpan& src, hsTArray<plCutoutPoly>& dst) const;
	void			ICutoutTransformedConstHeight(plAccessSpan& src, hsTArray<plCutoutPoly>& dst) const;


public:
	plCutter() {}
	virtual ~plCutter() {}

	CLASSNAME_REGISTER( plCutter );
	GETINTERFACE_ANY( plCutter, plCreatable );


	virtual void Read(hsStream* stream, hsResMgr* mgr);
	virtual void Write(hsStream* stream, hsResMgr* mgr);

	hsBool		FindHitPoints(const hsTArray<plCutoutPoly>& src, hsTArray<plCutoutHit>& hits) const;
	hsBool		FindHitPointsConstHeight(const hsTArray<plCutoutPoly>& src, hsTArray<plCutoutHit>& hits, hsScalar height) const;

	void		Set(const hsPoint3& pos, const hsVector3& dir, const hsVector3& out, hsBool flip=false);

	void		Cutout(plAccessSpan& src, hsTArray<plCutoutPoly>& dst) const;
	hsBool		CutoutGrid(int nWid, int nLen, plFlatGridMesh& dst) const;

	void		SetLength(const hsVector3& s) { fLengthU = s.fX; fLengthV = s.fY; fLengthW = s.fZ; }
	hsScalar	GetLengthU() const { return fLengthU; }
	hsScalar	GetLengthV() const { return fLengthV; }
	hsScalar	GetLengthW() const { return fLengthW; }

	const hsBounds3Ext& GetWorldBounds() const { return fWorldBounds; }
	plBoundsIsect& GetIsect() { return fIsect; }
	hsVector3 GetBackDir() const { return fBackDir; }

	static hsBool MakeGrid(int nWid, int nLen, const hsPoint3& center, const hsVector3& halfU, const hsVector3& halfV, plFlatGridMesh& grid);

};

#endif // plCutter_inc