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/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qpolygonoffset.h"
#include "qpolygonoffset_p.h"
#include <Qt3DRender/private/qrenderstatecreatedchange_p.h>
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
/*!
\class Qt3DRender::QPolygonOffset
\brief The QPolygonOffset class sets the scale and steps to calculate depth
values for polygon offsets.
\since 5.7
\inmodule Qt3DRender
\ingroup renderstates
A QPolygonOffset class adds an offset to the fragment depth value prior to
depth test and depth write. The offset can be used to avoid z-fighting when
rendering polygons with very close depth values such as decals.
*/
/*!
\qmltype PolygonOffset
\brief The PolygonOffset type sets the scale and steps to calculate depth
values for polygon offsets.
\since 5.7
\inqmlmodule Qt3D.Render
\ingroup renderstates
\inherits RenderState
\instantiates Qt3DRender::QPolygonOffset
A PolygonOffset type adds an offset to the fragment depth value prior to
depth test and depth write. The offset can be used to avoid z-fighting when
rendering polygons with very close depth values such as decals.
*/
/*!
\qmlproperty real PolygonOffset::scaleFactor
Holds the scale factor used to create a variable depth offset for
each polygon. Default value is 0.
*/
/*!
\qmlproperty real PolygonOffset::depthSteps
Holds the units that create constant depth offsets. Default value is 0.
*/
/*!
\property QPolygonOffset::scaleFactor
Holds the scale factor used to create a variable depth offset for
each polygon. Default value is 0.
*/
/*!
\property QPolygonOffset::depthSteps
Holds the units that create constant depth offsets. Default value is 0.
*/
/*!
The constructor creates a new QPolygonOffset::QPolygonOffset instance
with the specified \a parent
*/
QPolygonOffset::QPolygonOffset(QNode *parent)
: QRenderState(*new QPolygonOffsetPrivate, parent)
{
}
/*! \internal */
QPolygonOffset::~QPolygonOffset()
{
}
float QPolygonOffset::scaleFactor() const
{
Q_D(const QPolygonOffset);
return d->m_scaleFactor;
}
void QPolygonOffset::setScaleFactor(float scaleFactor)
{
Q_D(QPolygonOffset);
if (d->m_scaleFactor != scaleFactor) {
d->m_scaleFactor = scaleFactor;
emit scaleFactorChanged(d->m_scaleFactor);
}
}
float QPolygonOffset::depthSteps() const
{
Q_D(const QPolygonOffset);
return d->m_depthSteps;
}
void QPolygonOffset::setDepthSteps(float depthSteps)
{
Q_D(QPolygonOffset);
if (d->m_depthSteps != depthSteps) {
d->m_depthSteps = depthSteps;
emit depthStepsChanged(d->m_depthSteps);
}
}
Qt3DCore::QNodeCreatedChangeBasePtr QPolygonOffset::createNodeCreationChange() const
{
auto creationChange = QRenderStateCreatedChangePtr<QPolygonOffsetData>::create(this);
auto &data = creationChange->data;
Q_D(const QPolygonOffset);
data.scaleFactor = d->m_scaleFactor;
data.depthSteps = d->m_depthSteps;
return creationChange;
}
} // namespace Qt3DRender
QT_END_NAMESPACE
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