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// Copyright (C) 2018 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "abstractpickingjob_p.h"
#include <Qt3DRender/qgeometryrenderer.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>
#include <QtGui/qoffscreensurface.h>
#include <QtGui/qwindow.h>
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
namespace Render {
AbstractPickingJob::AbstractPickingJob()
: Qt3DCore::QAspectJob()
, m_manager(nullptr)
, m_node(nullptr)
, m_frameGraphRoot(nullptr)
, m_renderSettings(nullptr)
, m_oneEnabledAtLeast(false)
{
}
AbstractPickingJob::AbstractPickingJob(Qt3DCore::QAspectJobPrivate &dd)
: Qt3DCore::QAspectJob(dd)
, m_manager(nullptr)
, m_node(nullptr)
, m_frameGraphRoot(nullptr)
, m_renderSettings(nullptr)
, m_oneEnabledAtLeast(false)
{
}
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 Matrix4x4 &viewMatrix,
const Matrix4x4 &projectionMatrix, const QRect &viewport)
{
Vector3D nearPos = Vector3D(pos.x(), pos.y(), 0.0f);
nearPos = nearPos.unproject(viewMatrix, projectionMatrix, viewport);
Vector3D farPos = Vector3D(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 PickingUtils::ViewportCameraAreaDetails &vca,
QObject *eventSource,
const QPoint &pos) const
{
static RayCasting::QRay3D invalidRay({}, {}, 0.f);
if (!vca.area.isValid())
return invalidRay;
Matrix4x4 viewMatrix;
Matrix4x4 projectionMatrix;
Render::CameraLens::viewMatrixForCamera(m_manager->renderNodesManager(),
vca.cameraId,
viewMatrix,
projectionMatrix);
// Returns viewport rect in GL coordinates (y inverted)
const QRect viewport = windowViewport(vca.area, vca.viewport);
// In GL the y is inverted compared to Qt
const QPoint glCorrectPos = QPoint(pos.x(), vca.area.height() - pos.y());
if (!viewport.contains(glCorrectPos))
return invalidRay;
if (vca.surface) {
QSurface *surface = nullptr;
if (eventSource) {
QWindow *window = qobject_cast<QWindow *>(eventSource);
if (window) {
surface = static_cast<QSurface *>(window);
} else {
QOffscreenSurface *offscreen = qobject_cast<QOffscreenSurface *>(eventSource);
if (offscreen)
surface = static_cast<QSurface *>(offscreen);
}
}
if (surface && vca.surface != surface)
return invalidRay;
}
const auto ray = intersectionRay(glCorrectPos, viewMatrix, projectionMatrix, viewport);
return ray;
}
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
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