/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the Qt3D module of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include "lightmodel.h"

/*!

    \class LightModel

    \brief The LightModel class defines the lighting model to use for the scene.

    \since 4.7

    \ingroup qt3d

    \ingroup qt3d::painting

*/

/*!

    \enum LightModel::Model

    This enum defines the type of lighting model to use: one-sided or two-sided.

    \value OneSided One-sided lighting, with the front face material used for both front and back faces.

    \value TwoSided Two-sided lighting, with separate front and back face materials.

*/

/*!

    \enum LightModel::ColorControl

    This enum controls the number of colors to be generated by the lighting computation.

    \value SingleColor A single color is generated by the lighting computation.

    \value SeparateSpecularColor A separate specular color computation is

           performed and then summed into the pixel color after texture mapping.

*/

/*!

    \enum LightModel::ViewerPosition

    This enum defines the position of the viewer for the purposes of lighting calculations.

    \value ViewerAtInfinity The viewer is at infinity along the -z axis.

    \value LocalViewer The viewer is at the local origin in eye coordinates.

*/

class LightModelPrivate

{

public:

    LightModelPrivate()

        : model(LightModel::OneSided),

          colorControl(LightModel::SingleColor),

          viewerPosition(LightModel::ViewerAtInfinity)

    {

        ambientSceneColor.setRgbF(0.2, 0.2, 0.2, 1.0);

    }

    LightModel::Model model;

    LightModel::ColorControl colorControl;

    LightModel::ViewerPosition viewerPosition;

    QColor ambientSceneColor;

};

/*!

    Constructs a light model object with default values and attach

    it to \a parent.

*/

LightModel::LightModel(QObject *parent)

    : QObject(parent), d_ptr(new LightModelPrivate)

{

}

/*!

    Destroys this light model.

*/

LightModel::~LightModel()

{

}

/*!

    \property LightModel::model

    \brief the lighting model to use, either OneSided or TwoSided.

    The default is OneSided.

    \sa modelChanged()

*/

LightModel::Model LightModel::model() const

{

    Q_D(const LightModel);

    return d->model;

}

void LightModel::setModel(LightModel::Model value)

{

    Q_D(LightModel);

    if (d->model != value) {

        d->model = value;

        emit modelChanged();

        emit lightModelChanged();

    }

}

/*!

    \property LightModel::colorControl

    \brief the color control mode, either SingleColor or

    SeparateSpecularColor.  The default value is SingleColor.

    If SingleColor is specified, then a single color is calculated

    by the lighting computation for a vertex.  If SeparateSpecularColor

    is specified, then a separate specular color computation is

    performed and then summed into the pixel color after texture mapping.

    \sa colorControlChanged()

*/

LightModel::ColorControl LightModel::colorControl() const

{

    Q_D(const LightModel);

    return d->colorControl;

}

void LightModel::setColorControl(LightModel::ColorControl value)

{

    Q_D(LightModel);

    if (d->colorControl != value) {

        d->colorControl = value;

        emit colorControlChanged();

        emit lightModelChanged();

    }

}

/*!

    \property LightModel::viewerPosition

    \brief the viewer position, either ViewerAtInfinity or LocalViewer.

    The default value is ViewerAtInfinity.

    \sa viewerPositionChanged()

*/

LightModel::ViewerPosition LightModel::viewerPosition() const

{

    Q_D(const LightModel);

    return d->viewerPosition;

}

void LightModel::setViewerPosition(LightModel::ViewerPosition value)

{

    Q_D(LightModel);

    if (d->viewerPosition != value) {

        d->viewerPosition = value;

        emit viewerPositionChanged();

        emit lightModelChanged();

    }

}

/*!

    \property LightModel::ambientSceneColor

    \brief the ambient color of the entire scene.  The default value

    is (0.2, 0.2, 0.2, 1.0).

    \sa ambientSceneColorChanged()

*/

QColor LightModel::ambientSceneColor() const

{

    Q_D(const LightModel);

    return d->ambientSceneColor;

}

void LightModel::setAmbientSceneColor(const QColor& value)

{

    Q_D(LightModel);

    if (d->ambientSceneColor != value) {

        d->ambientSceneColor = value;

        emit ambientSceneColorChanged();

        emit lightModelChanged();

    }

}

/*!

    \fn void LightModel::modelChanged()

    This signal is emitted when model() changes.

    \sa model(), lightModelChanged()

*/

/*!

    \fn void LightModel::colorControlChanged()

    This signal is emitted when colorControl() changes.

    \sa colorControl(), lightModelChanged()

*/

/*!

    \fn void LightModel::viewerPositionChanged()

    This signal is emitted when viewerPosition() changes.

    \sa viewerPosition(), lightModelChanged()

*/

/*!

    \fn void LightModel::ambientSceneColorChanged()

    This signal is emitted when ambientSceneColor() changes.

    \sa ambientSceneColor(), lightModelChanged()

*/

/*!

    \fn void LightModel::lightModelChanged()

    This signal is emitted when one of model(), colorControl(),

    viewerPosition(), or ambientSceneColor() changes.

*/