1 files changed, 105 insertions, 0 deletions
diff --git a/src/core/render/backend/jobs/updateboundingvolumejob.cpp b/src/core/render/backend/jobs/updateboundingvolumejob.cpp
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+++ b/src/core/render/backend/jobs/updateboundingvolumejob.cpp
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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