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/****************************************************************************
**
** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) 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.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-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "dragontransformjobs_p.h"
#include <private/dragonattribute_p.h>
#include <private/dragonbuffer_p.h>
#include <private/dragongeometry_p.h>
#include <private/dragongeometryrenderer_p.h>
#include <private/dragonjobs_common_p.h>
#include <private/dragonsphere_p.h>
#include <private/dragonbuffervisitor_p.h>
QT_BEGIN_NAMESPACE
using namespace Qt3DCore;
namespace Qt3DRender {
namespace Dragon {
ValueContainer<Matrix4x4> calculateWorldTransforms(ValueContainer<Matrix4x4> worldTransforms,
const QHash<QNodeId, NodeTree::NodeInfo> hierarchy,
const ValueContainer<Entity> &entities,
const ValueContainer<Transform> &transforms,
QNodeId rootEntityId)
{
worldTransforms.reset();
// TODO remove false
if (!entities.anythingDirty() && !transforms.anythingDirty() && false)
return worldTransforms;
worldTransforms = ValueContainer<Matrix4x4>();
struct Data {
Data() { }
Data(QNodeId entityId_, bool dirty_, int level_) : entityId(entityId_), dirty(dirty_), level(level_) { }
QNodeId entityId;
bool dirty = false;
int level = 0;
};
// If entities are dirty, a transform component may have changed and we set the entire tree to
// be recalculated. Note that this could be optimized.
bool rootDirty = entities.anythingDirty();
const auto &rootEntity = entities[rootEntityId];
if (rootEntity->m_transformComponent.isNull()) {
worldTransforms[rootEntityId] = Matrix4x4{};
} else {
const auto &transform = transforms[rootEntity->m_transformComponent];
if (transforms.hasDirty(rootEntity->m_transformComponent))
rootDirty = true;
worldTransforms[rootEntityId] = transform->m_transformMatrix;
}
QStack<Data> stack;
stack.reserve(10);
stack.push({ rootEntityId, rootDirty, 0 });
while (!stack.isEmpty()) {
auto currentItem = stack.pop();
QNodeId currentId = currentItem.entityId;
int level = currentItem.level;
// bool currentDirty = currentItem.dirty;
bool currentDirty = true;
if (currentDirty)
worldTransforms.markDirty(currentId);
const auto ¤tWorldTransform = *worldTransforms[currentId];
Q_ASSERT(hierarchy.contains(currentId));
const auto &children = hierarchy[currentId].childIds;
// Iterate the children in reverse order (because the stack is last-in-first-out)
// TODO use std::reverse_iterator once we have C++17
for (auto it = children.rbegin(); it != children.rend(); ++it) {
const auto &childId = *it;
if (!entities.contains(childId)) {
// Skip past non-QEntity nodes
worldTransforms[childId] = currentWorldTransform;
stack.push({childId, currentDirty, level + 1});
continue;
}
const auto &childEntity = entities[childId];
bool childDirty = currentDirty || entities.hasDirtyOrCreated(childId);
if (!childEntity->m_transformComponent.isNull()) {
const auto &transform = transforms[childEntity->m_transformComponent];
childDirty |= transforms.hasDirtyOrCreated(childEntity->m_transformComponent);
if (childDirty)
worldTransforms[childId] = currentWorldTransform * transform->m_transformMatrix;
} else {
if (childDirty)
worldTransforms[childId] = currentWorldTransform;
}
stack.push({ childId, childDirty, level + 1 });
}
}
#ifdef QT_DEBUG
// Verify that all exist in debug mode only
for (const auto &key : entities.keys()) {
Q_ASSERT_X(worldTransforms.contains(key), "calculateWorldTransforms",
QStringLiteral("ERROR: Key %1 missing").arg(key.id()).toStdString().c_str());
}
#endif
return worldTransforms;
};
bool printTransforms(const ValueContainer<Matrix4x4> &transforms)
{
Q_UNUSED(transforms);
// for (const auto &transform : transforms) {
// qDebug() << "Value:" << transform.get();
// }
return true; // dummy, because we currently cannot return void
}
} // namespace Dragon
} // namespace Qt3DRender
QT_END_NAMESPACE
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