QmlDesigner: Center on selection box when fit tool is used in 3D Edit

Instead of centering edit camera on selected object, center it on
the selection box, which includes child objects.

Change-Id: I7315a4bcfffc74e72a2b21d0a04fc99ee9f4f3c3
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>

share/qtcreator/qml/qmlpuppet/mockfiles/EditView3D.qml

@@ -206,6 +206,7 @@ Window {
                 }
 
                 SelectionBox {
+                    id: selectionBox
                     view3D: editView
                     targetNode: viewWindow.selectedNode
                 }
@@ -378,8 +379,10 @@ Window {
                 togglable: false
 
                 onSelectedChanged: {
-                    if (selected)
-                        cameraControl.fitObject(viewWindow.selectedNode, editView.camera.rotation);
+                    if (selected) {
+                        var targetNode = viewWindow.selectedNode ? selectionBox.model : null;
+                        cameraControl.fitObject(targetNode, editView.camera.rotation);
+                    }
                 }
             }
         }
@@ -391,7 +394,7 @@ Window {
         width: 100
         height: width
         editCameraCtrl: cameraControl
-        selectedNode : viewWindow.selectedNode
+        selectedNode : viewWindow.selectedNode ? selectionBox.model : null
     }
 
     Column {

share/qtcreator/qml/qmlpuppet/mockfiles/SelectionBox.qml

@@ -32,6 +32,7 @@ Node {
 
     property View3D view3D
     property Node targetNode: null
+    property alias model: selectionBoxModel
 
     SelectionBoxGeometry {
         id: selectionBoxGeometry

share/qtcreator/qml/qmlpuppet/qml2puppet/editor3d/generalhelper.cpp

@@ -26,6 +26,8 @@
 
 #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>
@@ -154,8 +156,15 @@ QVector4D GeneralHelper::fitObjectToCamera(QQuick3DCamera *camera, float default
             if (window) {
                 auto context = QSSGRenderContextInterface::getRenderContextInterface(quintptr(window));
                 if (!context.isNull()) {
-                    auto bufferManager = context->bufferManager();
-                    QSSGBounds3 bounds = renderModel->getModelBounds(bufferManager);
+                    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();
@@ -164,8 +173,8 @@ QVector4D GeneralHelper::fitObjectToCamera(QQuick3DCamera *camera, float default
                     maxExtent *= maxScale;
 
                     // Adjust lookAt to look directly at the center of the object bounds
-                    QMatrix4x4 m = targetObject->sceneTransform();
-                    lookAt = m.map(center);
+                    lookAt = renderModel->globalTransform.map(center);
+                    lookAt.setZ(-lookAt.z()); // Render node transforms have inverted z
                 }
             }
         }

share/qtcreator/qml/qmlpuppet/qml2puppet/editor3d/selectionboxgeometry.cpp

@@ -31,7 +31,6 @@
 #include <QtQuick3DRuntimeRender/private/qssgrendermodel_p.h>
 #include <QtQuick3DRuntimeRender/private/qssgrendercontextcore_p.h>
 #include <QtQuick3DRuntimeRender/private/qssgrenderbuffermanager_p.h>
-#include <QtQuick3DUtils/private/qssgbounds3_p.h>
 #include <QtQuick3D/private/qquick3dmodel_p.h>
 #include <QtQuick3D/private/qquick3dobject_p_p.h>
 #include <QtQuick/qquickwindow.h>
@@ -74,6 +73,11 @@ bool QmlDesigner::Internal::SelectionBoxGeometry::isEmpty() const
     return m_isEmpty;
 }
 
+QSSGBounds3 SelectionBoxGeometry::bounds() const
+{
+    return m_bounds;
+}
+
 void SelectionBoxGeometry::setTargetNode(QQuick3DNode *targetNode)
 {
     if (m_targetNode == targetNode)
@@ -166,6 +170,8 @@ QSSGRenderGraphObject *SelectionBoxGeometry::updateSpatialNode(QSSGRenderGraphOb
     geometry->setPrimitiveType(QSSGRenderGeometry::Lines);
     geometry->setBounds(minBounds, maxBounds);
 
+    m_bounds = QSSGBounds3(minBounds, maxBounds);
+
     bool empty = minBounds.isNull() && maxBounds.isNull();
     if (m_isEmpty != empty) {
         m_isEmpty = empty;

share/qtcreator/qml/qmlpuppet/qml2puppet/editor3d/selectionboxgeometry.h

@@ -30,6 +30,7 @@
 #include <QtQuick3D/private/qquick3dnode_p.h>
 #include <QtQuick3D/private/qquick3dgeometry_p.h>
 #include <QtQuick3D/private/qquick3dviewport_p.h>
+#include <QtQuick3DUtils/private/qssgbounds3_p.h>
 
 namespace QmlDesigner {
 namespace Internal {
@@ -51,6 +52,8 @@ public:
     QQuick3DViewport *view3D() const;
     bool isEmpty() const;
 
+    QSSGBounds3 bounds() const;
+
 public Q_SLOTS:
     void setTargetNode(QQuick3DNode *targetNode);
     void setRootNode(QQuick3DNode *rootNode);
@@ -76,6 +79,7 @@ private:
     QQuick3DNode *m_rootNode = nullptr;
     bool m_isEmpty = true;
     QVector<QMetaObject::Connection> m_connections;
+    QSSGBounds3 m_bounds;
 };
 
 }