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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.
**
****************************************************************************/
import QtQuick 2.12
import QtQuick3D 1.15
Item {
id: cameraCtrl
property Camera camera: null
property View3D view3d: null
property string sceneId
property vector3d _lookAtPoint
property vector3d _pressPoint
property vector3d _prevPoint
property vector3d _startRotation
property vector3d _startPosition
property vector3d _startLookAtPoint
property matrix4x4 _startTransform
property bool _dragging
property int _button
property real _zoomFactor: 1
property Camera _prevCamera: null
readonly property vector3d _defaultCameraPosition: Qt.vector3d(0, 600, 600)
readonly property vector3d _defaultCameraRotation: Qt.vector3d(-45, 0, 0)
readonly property real _defaultCameraLookAtDistance: _defaultCameraPosition.length()
function restoreCameraState(cameraState)
{
if (!camera)
return;
_lookAtPoint = cameraState[0];
_zoomFactor = cameraState[1];
camera.position = cameraState[2];
camera.rotation = cameraState[3];
_generalHelper.zoomCamera(camera, 0, _defaultCameraLookAtDistance, _lookAtPoint,
_zoomFactor, false);
}
function restoreDefaultState()
{
if (!camera)
return;
_lookAtPoint = Qt.vector3d(0, 0, 0);
_zoomFactor = 1;
camera.position = _defaultCameraPosition;
camera.eulerRotation = _defaultCameraRotation;
_generalHelper.zoomCamera(camera, 0, _defaultCameraLookAtDistance, _lookAtPoint,
_zoomFactor, false);
}
function storeCameraState(delay)
{
if (!camera)
return;
var cameraState = [];
cameraState[0] = _lookAtPoint;
cameraState[1] = _zoomFactor;
cameraState[2] = camera.position;
cameraState[3] = camera.rotation;
_generalHelper.storeToolState(sceneId, "editCamState", cameraState, delay);
}
function focusObject(targetObject, rotation, updateZoom)
{
if (!camera)
return;
camera.eulerRotation = rotation;
var newLookAtAndZoom = _generalHelper.focusObjectToCamera(
camera, _defaultCameraLookAtDistance, targetObject, view3d, _zoomFactor, updateZoom);
_lookAtPoint = newLookAtAndZoom.toVector3d();
_zoomFactor = newLookAtAndZoom.w;
storeCameraState(0);
}
function zoomRelative(distance)
{
if (!camera)
return;
_zoomFactor = _generalHelper.zoomCamera(camera, distance, _defaultCameraLookAtDistance,
_lookAtPoint, _zoomFactor, true);
}
onCameraChanged: {
if (camera && _prevCamera) {
// Reset zoom on previous camera to ensure it's properties are good to copy to new cam
_generalHelper.zoomCamera(_prevCamera, 0, _defaultCameraLookAtDistance, _lookAtPoint,
1, false);
camera.position = _prevCamera.position;
camera.rotation = _prevCamera.rotation;
// Apply correct zoom to new camera
_generalHelper.zoomCamera(camera, 0, _defaultCameraLookAtDistance, _lookAtPoint,
_zoomFactor, false);
}
_prevCamera = camera;
}
MouseArea {
id: mouseHandler
acceptedButtons: Qt.LeftButton | Qt.RightButton | Qt.MiddleButton
hoverEnabled: false
anchors.fill: parent
onPositionChanged: {
if (cameraCtrl.camera && mouse.modifiers === Qt.AltModifier && cameraCtrl._dragging) {
var currentPoint = Qt.vector3d(mouse.x, mouse.y, 0);
if (cameraCtrl._button == Qt.LeftButton) {
_generalHelper.orbitCamera(cameraCtrl.camera, cameraCtrl._startRotation,
cameraCtrl._lookAtPoint, cameraCtrl._pressPoint,
currentPoint);
} else if (cameraCtrl._button == Qt.MiddleButton) {
cameraCtrl._lookAtPoint = _generalHelper.panCamera(
cameraCtrl.camera, cameraCtrl._startTransform,
cameraCtrl._startPosition, cameraCtrl._startLookAtPoint,
cameraCtrl._pressPoint, currentPoint, _zoomFactor);
} else if (cameraCtrl._button == Qt.RightButton) {
cameraCtrl.zoomRelative(currentPoint.y - cameraCtrl._prevPoint.y)
cameraCtrl._prevPoint = currentPoint;
}
}
}
onPressed: {
if (cameraCtrl.camera && mouse.modifiers === Qt.AltModifier) {
cameraCtrl._dragging = true;
cameraCtrl._startRotation = cameraCtrl.camera.eulerRotation;
cameraCtrl._startPosition = cameraCtrl.camera.position;
cameraCtrl._startLookAtPoint = _lookAtPoint;
cameraCtrl._pressPoint = Qt.vector3d(mouse.x, mouse.y, 0);
cameraCtrl._prevPoint = cameraCtrl._pressPoint;
cameraCtrl._button = mouse.button;
cameraCtrl._startTransform = cameraCtrl.camera.sceneTransform;
} else {
mouse.accepted = false;
}
}
function handleRelease() {
cameraCtrl._dragging = false;
cameraCtrl.storeCameraState(0);
}
onReleased: handleRelease()
onCanceled: handleRelease()
onWheel: {
if (cameraCtrl.camera) {
// Empirically determined divisor for nice zoom
cameraCtrl.zoomRelative(wheel.angleDelta.y / -40);
cameraCtrl.storeCameraState(500);
}
}
}
}
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