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/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** 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 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** 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.
**
****************************************************************************/
#include "generalhelper.h"
#ifdef QUICK3D_MODULE
#include "selectionboxgeometry.h"
#include <QtQuick3D/private/qquick3dorthographiccamera_p.h>
#include <QtQuick3D/private/qquick3dperspectivecamera_p.h>
#include <QtQuick3D/private/qquick3dobject_p_p.h>
#include <QtQuick3D/private/qquick3dcamera_p.h>
#include <QtQuick3D/private/qquick3dnode_p.h>
#include <QtQuick3D/private/qquick3dmodel_p.h>
#include <QtQuick3D/private/qquick3dviewport_p.h>
#include <QtQuick3D/private/qquick3ddefaultmaterial_p.h>
#include <QtQuick3DRuntimeRender/private/qssgrendercontextcore_p.h>
#include <QtQuick3DRuntimeRender/private/qssgrenderbuffermanager_p.h>
#include <QtQuick3DRuntimeRender/private/qssgrendermodel_p.h>
#include <QtQuick3DUtils/private/qssgbounds3_p.h>
#include <QtQuick/qquickwindow.h>
#include <QtCore/qmath.h>
namespace QmlDesigner {
namespace Internal {
GeneralHelper::GeneralHelper()
: QObject()
{
m_overlayUpdateTimer.setInterval(16);
m_overlayUpdateTimer.setSingleShot(true);
QObject::connect(&m_overlayUpdateTimer, &QTimer::timeout,
this, &GeneralHelper::overlayUpdateNeeded);
}
void GeneralHelper::requestOverlayUpdate()
{
if (!m_overlayUpdateTimer.isActive())
m_overlayUpdateTimer.start();
}
QString GeneralHelper::generateUniqueName(const QString &nameRoot)
{
static QHash<QString, int> counters;
int count = counters[nameRoot]++;
return QStringLiteral("%1_%2").arg(nameRoot).arg(count);
}
void GeneralHelper::orbitCamera(QQuick3DCamera *camera, const QVector3D &startRotation,
const QVector3D &lookAtPoint, const QVector3D &pressPos,
const QVector3D ¤tPos)
{
QVector3D dragVector = currentPos - pressPos;
if (dragVector.length() < 0.001f)
return;
camera->setRotation(startRotation);
QVector3D newRotation(dragVector.y(), dragVector.x(), 0.f);
newRotation *= 0.5f; // Emprically determined multiplier for nice drag
newRotation += startRotation;
camera->setRotation(newRotation);
const QVector3D oldLookVector = camera->position() - lookAtPoint;
QMatrix4x4 m = camera->sceneTransform();
const float *dataPtr(m.data());
QVector3D newLookVector(-dataPtr[8], -dataPtr[9], -dataPtr[10]);
newLookVector.normalize();
newLookVector *= oldLookVector.length();
camera->setPosition(lookAtPoint + newLookVector);
}
// Pans camera and returns the new look-at point
QVector3D GeneralHelper::panCamera(QQuick3DCamera *camera, const QMatrix4x4 startTransform,
const QVector3D &startPosition, const QVector3D &startLookAt,
const QVector3D &pressPos, const QVector3D ¤tPos,
float zoomFactor)
{
QVector3D dragVector = currentPos - pressPos;
if (dragVector.length() < 0.001f)
return startLookAt;
const float *dataPtr(startTransform.data());
const QVector3D xAxis = QVector3D(dataPtr[0], dataPtr[1], dataPtr[2]).normalized();
const QVector3D yAxis = QVector3D(dataPtr[4], dataPtr[5], dataPtr[6]).normalized();
const QVector3D xDelta = -1.f * xAxis * dragVector.x();
const QVector3D yDelta = yAxis * dragVector.y();
const QVector3D delta = (xDelta + yDelta) * zoomFactor;
camera->setPosition(startPosition + delta);
return startLookAt + delta;
}
float GeneralHelper::zoomCamera(QQuick3DCamera *camera, float distance, float defaultLookAtDistance,
const QVector3D &lookAt, float zoomFactor, bool relative)
{
// Emprically determined divisor for nice zoom
float multiplier = 1.f + (distance / 40.f);
float newZoomFactor = relative ? qBound(.0001f, zoomFactor * multiplier, 10000.f)
: zoomFactor;
if (qobject_cast<QQuick3DOrthographicCamera *>(camera)) {
// Ortho camera we can simply scale
camera->setScale(QVector3D(newZoomFactor, newZoomFactor, newZoomFactor));
} else if (qobject_cast<QQuick3DPerspectiveCamera *>(camera)) {
// Perspective camera is zoomed by moving camera forward or backward while keeping the
// look-at point the same
const QVector3D lookAtVec = (camera->position() - lookAt).normalized();
const float newDistance = defaultLookAtDistance * newZoomFactor;
camera->setPosition(lookAt + (lookAtVec * newDistance));
}
return newZoomFactor;
}
// Return value contains new lookAt point (xyz) and zoom factor (w)
QVector4D GeneralHelper::focusObjectToCamera(QQuick3DCamera *camera, float defaultLookAtDistance,
QQuick3DNode *targetObject, QQuick3DViewport *viewPort,
float oldZoom, bool updateZoom)
{
if (!camera)
return QVector4D(0.f, 0.f, 0.f, 1.f);
QVector3D lookAt = targetObject ? targetObject->scenePosition() : QVector3D();
// Get object bounds
const qreal defaultExtent = 200.;
qreal maxExtent = defaultExtent;
if (auto modelNode = qobject_cast<QQuick3DModel *>(targetObject)) {
auto targetPriv = QQuick3DObjectPrivate::get(targetObject);
if (auto renderModel = static_cast<QSSGRenderModel *>(targetPriv->spatialNode)) {
QWindow *window = static_cast<QWindow *>(viewPort->window());
if (window) {
auto context = QSSGRenderContextInterface::getRenderContextInterface(quintptr(window));
if (!context.isNull()) {
QSSGBounds3 bounds;
auto geometry = qobject_cast<SelectionBoxGeometry *>(modelNode->geometry());
if (geometry) {
bounds = geometry->bounds();
} else {
auto bufferManager = context->bufferManager();
bounds = renderModel->getModelBounds(bufferManager);
}
QVector3D center = bounds.center();
const QVector3D e = bounds.extents();
const QVector3D s = targetObject->sceneScale();
qreal maxScale = qSqrt(qreal(s.x() * s.x() + s.y() * s.y() + s.z() * s.z()));
maxExtent = qSqrt(qreal(e.x() * e.x() + e.y() * e.y() + e.z() * e.z()));
maxExtent *= maxScale;
if (maxExtent < 0.0001)
maxExtent = defaultExtent;
// Adjust lookAt to look directly at the center of the object bounds
lookAt = renderModel->globalTransform.map(center);
lookAt.setZ(-lookAt.z()); // Render node transforms have inverted z
}
}
}
}
// Reset camera position to default zoom
QMatrix4x4 m = camera->sceneTransform();
const float *dataPtr(m.data());
QVector3D newLookVector(-dataPtr[8], -dataPtr[9], -dataPtr[10]);
newLookVector.normalize();
newLookVector *= defaultLookAtDistance;
camera->setPosition(lookAt + newLookVector);
float newZoomFactor = updateZoom ? qBound(.0001f, float(maxExtent / 700.), 10000.f) : oldZoom;
float cameraZoomFactor = zoomCamera(camera, 0, defaultLookAtDistance, lookAt, newZoomFactor, false);
return QVector4D(lookAt, cameraZoomFactor);
}
void GeneralHelper::delayedPropertySet(QObject *obj, int delay, const QString &property,
const QVariant &value)
{
QTimer::singleShot(delay, [obj, property, value]() {
obj->setProperty(property.toLatin1().constData(), value);
});
}
QQuick3DNode *GeneralHelper::resolvePick(QQuick3DNode *pickNode)
{
if (pickNode) {
// Check if the picked node actually specifies another node as the pick target
QVariant componentVar = pickNode->property("_pickTarget");
if (componentVar.isValid()) {
auto componentNode = componentVar.value<QQuick3DNode *>();
if (componentNode)
return componentNode;
}
}
return pickNode;
}
}
}
#endif // QUICK3D_MODULE
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