/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:    

*

*/

#ifndef HGTRANSFORMEDQUAD_H

#define HGTRANSFORMEDQUAD_H

#include <QVector2D>

class HgQuad;

class QMatrix4x4;

class QPointF;

class QSizeF;

class QPolygonF;

class QPainter;

/**

 * Base class for transformed quads, to be used by renderers.

 */

class HgTransformedQuad

{

public:

    HgTransformedQuad(qreal yDir=1);

    virtual ~HgTransformedQuad();

    int index() const;

    bool isPointInside(const QPointF& point) const;

    void transformQuad(int index, const QMatrix4x4& projView, HgQuad* quad, 

        qreal mirroringPlaneY, const QVector2D& translate, const QPointF& center, 

        const QSizeF& windowSize);

    void getTransformedPoints(QPolygonF& poly) const;

    HgQuad* quad() const;

    virtual void draw(QPainter* painter, const QRectF& rect)=0;

    static bool quadSorter(HgTransformedQuad* a, HgTransformedQuad* b);

protected:

    void computeMirroredPoints(const QMatrix4x4& trans, const QMatrix4x4& projView, 

        qreal mirroringPlaneY, const QVector2D& translate, const QPointF& center, 

        const QSizeF& windowSize);

    void perspectiveTransformPoints(QVector2D* outPoints, const QMatrix4x4& matrix, 

        const QPointF& center, const QSizeF& windowSize);

protected:

    int mIndex;

    HgQuad* mQuad;

    QVector2D mTransformedPoints[4];

    QVector2D mMirroredPoints[4];

    qreal mYDir;

};

#endif