1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
// Copyright (C) 2019 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0 WITH Qt-GPL-exception-1.0
import QtQuick 6.0
import QtQuick3D 6.0
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()
readonly property real _keyPanAmount: 5
property bool ignoreToolState: false
function restoreCameraState(cameraState)
{
if (!camera || ignoreToolState)
return;
_lookAtPoint = cameraState[0];
_zoomFactor = cameraState[1];
camera.position = cameraState[2];
camera.rotation = cameraState[3];
_generalHelper.zoomCamera(view3d, 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(view3d, camera, 0, _defaultCameraLookAtDistance, _lookAtPoint,
_zoomFactor, false);
}
function storeCameraState(delay)
{
if (!camera || ignoreToolState)
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(targetNodes, rotation, updateZoom, closeUp)
{
if (!camera)
return;
// targetNodes could be a list of nodes or a single node
var nodes = [];
if (targetNodes instanceof Node)
nodes.push(targetNodes);
else
nodes = targetNodes
camera.eulerRotation = rotation;
var newLookAtAndZoom = _generalHelper.focusNodesToCamera(
camera, _defaultCameraLookAtDistance, nodes, view3d, _zoomFactor,
updateZoom, closeUp);
_lookAtPoint = newLookAtAndZoom.toVector3d();
_zoomFactor = newLookAtAndZoom.w;
storeCameraState(0);
}
function alignCameras(targetNodes)
{
if (!camera)
return;
// targetNodes could be a list of nodes or a single node
var nodes = [];
if (targetNodes instanceof Node)
nodes.push(targetNodes);
else
nodes = targetNodes
_generalHelper.alignCameras(camera, nodes);
}
function alignView(targetNodes)
{
if (!camera)
return;
// targetNodes could be a list of nodes or a single node
var nodes = [];
if (targetNodes instanceof Node)
nodes.push(targetNodes);
else
nodes = targetNodes
_lookAtPoint = _generalHelper.alignView(camera, nodes, _lookAtPoint);
storeCameraState(0);
}
function zoomRelative(distance)
{
if (!camera)
return;
_zoomFactor = _generalHelper.zoomCamera(view3d, 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(view3d, _prevCamera, 0, _defaultCameraLookAtDistance, _lookAtPoint,
1, false);
camera.position = _prevCamera.position;
camera.rotation = _prevCamera.rotation;
// Apply correct zoom to new camera
_generalHelper.zoomCamera(view3d, camera, 0, _defaultCameraLookAtDistance, _lookAtPoint,
_zoomFactor, false);
}
_prevCamera = camera;
}
MouseArea {
id: mouseHandler
acceptedButtons: Qt.LeftButton | Qt.RightButton | Qt.MiddleButton
hoverEnabled: false
anchors.fill: parent
onPositionChanged: (mouse)=> {
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: (mouse)=> {
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: (wheel)=> {
if (cameraCtrl.camera) {
// Empirically determined divisor for nice zoom
cameraCtrl.zoomRelative(wheel.angleDelta.y / -40);
cameraCtrl.storeCameraState(500);
}
}
}
Keys.onPressed: (event)=> {
var pressPoint = Qt.vector3d(view3d.width / 2, view3d.height / 2, 0);
var currentPoint;
switch (event.key) {
case Qt.Key_Left:
currentPoint = pressPoint.plus(Qt.vector3d(_keyPanAmount, 0, 0));
break;
case Qt.Key_Right:
currentPoint = pressPoint.plus(Qt.vector3d(-_keyPanAmount, 0, 0));
break;
case Qt.Key_Up:
currentPoint = pressPoint.plus(Qt.vector3d(0, _keyPanAmount, 0));
break;
case Qt.Key_Down:
currentPoint = pressPoint.plus(Qt.vector3d(0, -_keyPanAmount, 0));
break;
default:
break;
}
if (currentPoint) {
_lookAtPoint = _generalHelper.panCamera(
camera, cameraCtrl.camera.sceneTransform,
cameraCtrl.camera.position, _lookAtPoint,
pressPoint, currentPoint, _zoomFactor);
event.accepted = true;
}
}
}
|
