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/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 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, Digia gives you certain additional
** rights. These rights are described in the Digia 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "nodevisitor.h"
#include "qnode.h"
#include "qentity.h"
QT_BEGIN_NAMESPACE
namespace Qt3D {
NodeVisitor::NodeVisitor()
: m_traverseDisabled(false)
{
}
NodeVisitor::~NodeVisitor()
{
}
void NodeVisitor::traverse(QNode *rootNode)
{
m_path = NodeList() << rootNode;
m_matrixStack.clear();
QEntity* rootEntity = qobject_cast<QEntity *>(rootNode);
if (rootEntity)
visitEntity(rootEntity);
else
visitNode(rootNode);
}
QNode* NodeVisitor::rootNode() const
{
return m_path.front();
}
QNode* NodeVisitor::currentNode() const
{
return m_path.back();
}
QMatrix4x4 NodeVisitor::currentMatrix() const
{
return m_matrixStack.back();
}
NodeList NodeVisitor::path() const
{
return m_path;
}
void NodeVisitor::setTraverseDisabled(bool on)
{
m_traverseDisabled = on;
}
void NodeVisitor::visitNode(QNode *nd)
{
Q_UNUSED(nd);
traverseChildren();
}
void NodeVisitor::visitEntity(QEntity *nd)
{
visitNode(nd);
}
void NodeVisitor::traverseChildren()
{
foreach (QObject *n, currentNode()->children()) {
QNode *node = qobject_cast<QNode *>(n);
if (node != Q_NULLPTR)
outerVisitNode(node);
} // of children iteration
}
void NodeVisitor::outerVisitNode(QNode *n)
{
m_path.append(n);
QEntity* e = qobject_cast<QEntity *>(n);
if (e) {
visitEntity(e);
m_path.pop_back();
}
else {
visitNode(n);
}
}
} // namespace Qt3D
QT_END_NAMESPACE
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