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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
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 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
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#ifndef _DXFVEC_HXX
#define _DXFVEC_HXX

#include <tools/gen.hxx>
#include <vcl/lineinfo.hxx>

class DXFLineInfo {
public:
	LineStyle		eStyle;
	double			fWidth;
	sal_Int32		nDashCount;
	double			fDashLen;
	sal_Int32		nDotCount;
	double			fDotLen;
	double			fDistance;

	DXFLineInfo() :
		eStyle(LINE_SOLID),
		fWidth(0),
		nDashCount(0),
		fDashLen(0),
		nDotCount(0),
		fDotLen(0),
		fDistance(0) {}

	DXFLineInfo(const DXFLineInfo& x) :
		eStyle(x.eStyle),
		fWidth(x.fWidth),
		nDashCount(x.nDashCount),
		fDashLen(x.fDashLen),
		nDotCount(x.nDotCount),
		fDotLen(x.fDotLen),
		fDistance(x.fDistance) {}

};


//------------------------------------------------------------------------------
//---------------------------- DXFVector ---------------------------------------
//------------------------------------------------------------------------------
// Allgemeiner 3D-Vektor mit double

class DXFVector {

public:

	double fx,fy,fz; // public ! - Warum nicht ?

	inline DXFVector(double fX=0.0, double fY=0.0, double fZ=0.0);
	inline DXFVector(const DXFVector & rV);

	// Addition/Subtraktion:
	DXFVector & operator += (const DXFVector & rV);
	DXFVector   operator +  (const DXFVector & rV) const;
	DXFVector & operator -= (const DXFVector & rV);
	DXFVector   operator -  (const DXFVector & rV) const;

	// Vektorprodukt
	DXFVector   operator *  (const DXFVector & rV) const;

	// Skalarprodukt:
	double SProd(const DXFVector & rV) const;

	// Multiplikation mit Skalar:
	DXFVector & operator *= (double fs);
	DXFVector   operator *  (double fs) const;

	// Laenge:
	double Abs() const;

	// Vektor gleicher Richtung und der Laenge 1:
	DXFVector Unit() const;

	// Aequivalenz oder nicht:
	sal_Bool operator == (const DXFVector & rV) const;
	sal_Bool operator != (const DXFVector & rV) const;
};

//------------------------------------------------------------------------------
//---------------------------- DXFTransform ------------------------------------
//------------------------------------------------------------------------------
// Eine Transformationsmatrix, spezialisiert auf unser Problem

class DXFTransform {

public:

	DXFTransform();
		// Zielkoordinate = Quellkoordinate

	DXFTransform(double fScaleX, double fScaleY, double fScaleZ,
				 const DXFVector & rShift);
		// Zielkoordinate = Verschoben(Skaliert(Quellkoorinate))

	DXFTransform(double fScaleX, double fScaleY, double fScaleZ,
				 double fRotAngle,
				 const DXFVector & rShift);
		// Zielkoordinate = Verschoben(Gedreht(Skaliert(Quellkoorinate)))
		// Drehung geshieht um die Z-Achse, fRotAngle in Grad.

	DXFTransform(const DXFVector & rExtrusion);
		// Transformation "ECS->WCS" per "Entity Extrusion Direction"
		// und dem "Arbitrary Axis Algorithm"
		// (Siehe DXF-Docu von AutoDesk)

	DXFTransform(const DXFVector & rViewDir, const DXFVector & rViewTarget);
		// Transformation Objektraum->Bildraum anhand von Richtung und
		// Zielpunkt eines ViewPort.
		// (siehe DXF-Docu von AutoDesk: VPORT)

	DXFTransform(const DXFTransform & rT1, const DXFTransform & rT2);
		// Zielkoordinate = rT2(rT1(Quellkoorinate))


	void Transform(const DXFVector & rSrc, DXFVector & rTgt) const;
		// Transformation DXFVector nach DXFVector

	void Transform(const DXFVector & rSrc, Point & rTgt) const;
		// Transformation DXFVector nach SvPoint

	void TransDir(const DXFVector & rSrc, DXFVector & rTgt) const;
		// Transformation eines relativen Vektors (also kein Verschiebung)

	sal_Bool TransCircleToEllipse(double fRadius, double & rEx, double & rEy) const;
		// Versucht, einen Kreis (in der XY-Ebene) zu transformieren, so dass eine
		// ausgerichtete Ellipse entsteht. Wenn das nicht geht, weil Ellipse
		// in belibieger Lage entstehen wuerde, wird sal_False geliefert.
		// (Der Mittelpunkt wird hiermit nicht transformiert, nehme Transform(..))

	sal_uLong TransLineWidth(double fW) const;
		// Transformiert die Liniendicke (so gut es geht)

	double CalcRotAngle() const;
		// Ermittelt den Rotationswinkel um die Z-Achse (in Grad)

	sal_Bool Mirror() const;
		// Liefert sal_True, wenn die Matrix ein Linkssystem bildet

	LineInfo Transform(const DXFLineInfo& aDXFLineInfo) const;
		// Transform to LineInfo

private:
	DXFVector aMX;
	DXFVector aMY;
	DXFVector aMZ;
	DXFVector aMP;
};

//------------------------------------------------------------------------------
//------------------------------- inlines --------------------------------------
//------------------------------------------------------------------------------


inline DXFVector::DXFVector(double fX, double fY, double fZ)
{
	fx=fX; fy=fY; fz=fZ;
}


inline DXFVector::DXFVector(const DXFVector & rV)
{
	fx=rV.fx; fy=rV.fy; fz=rV.fz;
}


inline DXFVector & DXFVector::operator += (const DXFVector & rV)
{
	fx+=rV.fx; fy+=rV.fy; fz+=rV.fz;
	return *this;
}


inline DXFVector DXFVector::operator + (const DXFVector & rV) const
{
	return DXFVector(fx+rV.fx, fy+rV.fy, fz+rV.fz);
}


inline DXFVector & DXFVector::operator -= (const DXFVector & rV)
{
	fx-=rV.fx; fy-=rV.fy; fz-=rV.fz;
	return *this;
}


inline DXFVector DXFVector::operator - (const DXFVector & rV) const
{
	return DXFVector(fx-rV.fx, fy-rV.fy, fz-rV.fz);
}


inline DXFVector DXFVector::operator *  (const DXFVector & rV) const
{
	return DXFVector(
		fy * rV.fz - fz * rV.fy,
		fz * rV.fx - fx * rV.fz,
		fx * rV.fy - fy * rV.fx
	);
}


inline double DXFVector::SProd(const DXFVector & rV) const
{
	return fx*rV.fx + fy*rV.fy + fz*rV.fz;
}


inline DXFVector & DXFVector::operator *= (double fs)
{
	fx*=fs; fy*=fs; fz*=fs;
	return *this;
}


inline DXFVector DXFVector::operator * (double fs) const
{
	return DXFVector(fx*fs,fy*fs,fz*fs);
}


inline sal_Bool DXFVector::operator == (const DXFVector & rV) const
{
	if (fx==rV.fx && fy==rV.fy && fz==rV.fz) return sal_True;
	else return sal_False;
}


inline sal_Bool DXFVector::operator != (const DXFVector & rV) const
{
	if (fx!=rV.fx || fy!=rV.fy || fz!=rV.fz) return sal_True;
	else return sal_False;
}

#endif