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/****************************************************************************
**
** Copyright (C) 2018 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 "abstractpickingjob_p.h"
#include <Qt3DRender/qgeometryrenderer.h>
#include <Qt3DRender/private/renderer_p.h>
#include <Qt3DRender/private/nodemanagers_p.h>
#include <Qt3DRender/private/entity_p.h>
#include <Qt3DRender/private/objectpicker_p.h>
#include <Qt3DRender/private/managers_p.h>
#include <Qt3DRender/private/geometryrenderer_p.h>
#include <Qt3DRender/private/rendersettings_p.h>
#include <Qt3DRender/private/trianglesvisitor_p.h>
#include <Qt3DRender/private/job_common_p.h>
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
namespace Render {
AbstractPickingJob::AbstractPickingJob()
: m_manager(nullptr)
, m_node(nullptr)
, m_frameGraphRoot(nullptr)
, m_renderSettings(nullptr)
{
}
void AbstractPickingJob::setRoot(Entity *root)
{
m_node = root;
}
void AbstractPickingJob::setFrameGraphRoot(FrameGraphNode *frameGraphRoot)
{
m_frameGraphRoot = frameGraphRoot;
}
void AbstractPickingJob::setRenderSettings(RenderSettings *settings)
{
m_renderSettings = settings;
}
void AbstractPickingJob::setManagers(NodeManagers *manager)
{
m_manager = manager;
}
void AbstractPickingJob::run()
{
Q_ASSERT(m_frameGraphRoot && m_renderSettings && m_node && m_manager);
runHelper();
}
RayCasting::QRay3D AbstractPickingJob::intersectionRay(const QPoint &pos, const QMatrix4x4 &viewMatrix,
const QMatrix4x4 &projectionMatrix, const QRect &viewport)
{
QVector3D nearPos = QVector3D(pos.x(), pos.y(), 0.0f);
nearPos = nearPos.unproject(viewMatrix, projectionMatrix, viewport);
QVector3D farPos = QVector3D(pos.x(), pos.y(), 1.0f);
farPos = farPos.unproject(viewMatrix, projectionMatrix, viewport);
return RayCasting::QRay3D(nearPos,
(farPos - nearPos).normalized(),
(farPos - nearPos).length());
}
QRect AbstractPickingJob::windowViewport(const QSize &area, const QRectF &relativeViewport) const
{
if (area.isValid()) {
const int areaWidth = area.width();
const int areaHeight = area.height();
return QRect(relativeViewport.x() * areaWidth,
(1.0 - relativeViewport.y() - relativeViewport.height()) * areaHeight,
relativeViewport.width() * areaWidth,
relativeViewport.height() * areaHeight);
}
return relativeViewport.toRect();
}
RayCasting::QRay3D AbstractPickingJob::rayForViewportAndCamera(const QSize &area,
const QPoint &pos,
const QRectF &relativeViewport,
const Qt3DCore::QNodeId cameraId) const
{
QMatrix4x4 viewMatrix;
QMatrix4x4 projectionMatrix;
Render::CameraLens::viewMatrixForCamera(m_manager->renderNodesManager(), cameraId, viewMatrix, projectionMatrix);
const QRect viewport = windowViewport(area, relativeViewport);
// In GL the y is inverted compared to Qt
const QPoint glCorrectPos = QPoint(pos.x(), area.isValid() ? area.height() - pos.y() : pos.y());
const auto ray = intersectionRay(glCorrectPos, viewMatrix, projectionMatrix, viewport);
return ray;
}
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
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