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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 "updateboundingvolumejob.h"
#include <rendernode.h>
#include <sphere.h>
#include <QDebug>
#include <QElapsedTimer>
#include <QStack>
#include <QThread>
static void expandWorldBoundingVolume(Qt3D::Render::RenderNode *node)
{
Qt3D::Render::RenderNode *currentNode = node;
QStack<int> childIndexStack;
forever {
// Find left most leaf node of currentNode
while (!currentNode->m_children.isEmpty()) {
childIndexStack.push(1);
currentNode = node->m_children.first();
}
if (!currentNode->m_parent)
return;
// Initialize parent bounding volume to be equal to that of the first child
Qt3D::Render::RenderNode *parentNode = currentNode->m_parent;
Qt3D::Sphere *parentBoundingVolume = parentNode->m_worldBoundingVolume;
*(parentBoundingVolume) = *(currentNode->m_worldBoundingVolume);
// Expand the parent bounding volume by each of remaining the siblings
const int siblingCount = parentNode->m_children.count();
for (int i = 1; i < siblingCount; ++i) {
Qt3D::Sphere *siblingBoundingVolume = parentNode->m_children.at(i)->m_worldBoundingVolume;
parentBoundingVolume->expandToContain(*siblingBoundingVolume);
}
// Move to parent's next sibling
childIndexStack.pop();
const int nextSiblingIndex = childIndexStack.top()++;
currentNode = parentNode->m_parent->m_children.at(nextSiblingIndex);
}
}
namespace Qt3D {
namespace Render {
UpdateBoundingVolumeJob::UpdateBoundingVolumeJob(RenderNode *node)
: m_node(node)
{
}
void UpdateBoundingVolumeJob::run()
{
// Expand the bounding volumes of each node that has children by the
// bounding volumes of the children
// TODO: Implement this using a parallel_for
qDebug() << "Entering" << Q_FUNC_INFO << QThread::currentThread();
expandWorldBoundingVolume(m_node);
qDebug() << "Exiting" << Q_FUNC_INFO << QThread::currentThread();
}
} // namespace Render
} // namespace Qt3D
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