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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtQuick3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qgraphicstransform3d.h"
QT_BEGIN_NAMESPACE
/*!
\class QGraphicsTransform3D
\brief The QGraphicsTransform3D class is an abstract base class for building 3D transformations.
\since 4.8
\ingroup qt3d
\ingroup qt3d::graphicsview
QGraphicsTransform3D lets you create and control advanced transformations
that can be configured independently using specialized properties.
Scene nodes have an associated list of transforms, which are applied
in order, one at a time, to the modelview matrix. Transformations are
computed in true 3D space using QMatrix4x4.
QGraphicsTransform3D is particularly useful for animations. Whereas
QGLPainter::modelViewMatrix() lets you assign any transform directly,
there is no direct way to interpolate between two different
transformations (e.g., when transitioning between two states, each for
which the item has a different arbitrary transform assigned). Using
QGraphicsTransform3D you can interpolate the property values of each
independent transformation. The resulting operation is then combined into a
single transform which is applied to the modelview matrix during drawing.
If you want to create your own configurable transformation, you can create
a subclass of QGraphicsTransform3D (or any or the existing subclasses), and
reimplement the pure virtual applyTo() function, which takes a pointer to a
QMatrix4x4. Each operation you would like to apply should be exposed as
properties (e.g., customTransform->setVerticalShear(2.5)). Inside you
reimplementation of applyTo(), you can modify the provided transform
respectively.
\sa QGraphicsScale3D, QGraphicsRotation3D, QGraphicsTranslation3D
\sa QGraphicsBillboardTransform
*/
/*!
\fn QGraphicsTransform3D::QGraphicsTransform3D(QObject *parent)
Constructs a 3D transformation and attaches it to \a parent.
*/
/*!
\fn QGraphicsTransform3D::~QGraphicsTransform3D()
Destroys this 3D transformation.
*/
/*!
\fn void QGraphicsTransform3D::applyTo(QMatrix4x4 *matrix) const
Applies the effect of this transformation to the specified
modelview \a matrix.
*/
/*!
\fn QGraphicsTransform3D *QGraphicsTransform3D::clone(QObject *parent) const
Clones a copy of this transformation and attaches the clone to \a parent.
*/
/*!
\fn void QGraphicsTransform3D::transformChanged()
Signal that is emitted whenever any of the transformation's
parameters are changed.
*/
QT_END_NAMESPACE
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