Annotation of /trunk/DefaultRenderer/CameraControl.cs
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Revision 20 - (view) (download)
| 1 : | albert | 16 | //------------------------------------------------------------------ |
| 2 : | // | ||
| 3 : | // The following article discusses the mechanics behind this | ||
| 4 : | // trackball implementation: http://viewport3d.com/trackball.htm | ||
| 5 : | // | ||
| 6 : | // Reading the article is not required to use this sample code, | ||
| 7 : | // but skimming it might be useful. | ||
| 8 : | // | ||
| 9 : | // For licensing information and to get the latest version go to: | ||
| 10 : | // http://workspaces.gotdotnet.com/3dtools | ||
| 11 : | // | ||
| 12 : | //------------------------------------------------------------------ | ||
| 13 : | |||
| 14 : | using System; | ||
| 15 : | using System.Windows; | ||
| 16 : | using System.Windows.Input; | ||
| 17 : | using System.Windows.Media; | ||
| 18 : | using System.Windows.Media.Media3D; | ||
| 19 : | using System.Windows.Controls; | ||
| 20 : | using Petzold.Media3D; | ||
| 21 : | |||
| 22 : | |||
| 23 : | namespace Xenki.DefaultRenderer | ||
| 24 : | { | ||
| 25 : | public class CameraControl | ||
| 26 : | { | ||
| 27 : | private FrameworkElement _eventSource; | ||
| 28 : | private Point _previousPosition2D; | ||
| 29 : | private Vector3D _previousPosition3D = new Vector3D(0, 0, 1); | ||
| 30 : | |||
| 31 : | private Transform3DGroup _transform; | ||
| 32 : | private ScaleTransform3D _scale = new ScaleTransform3D(); | ||
| 33 : | private AxisAngleRotation3D _rotation = new AxisAngleRotation3D(); | ||
| 34 : | private TranslateTransform3D _translate = new TranslateTransform3D(); | ||
| 35 : | |||
| 36 : | private Vector3D _cameraLookDirection = new Vector3D(128, 128, 10); | ||
| 37 : | |||
| 38 : | private PerspectiveCamera _camera; | ||
| 39 : | private Point3D _cameraLookPoint; | ||
| 40 : | private RotateTransform3D _rotationTransform = new RotateTransform3D(); | ||
| 41 : | albert | 19 | //ModelVisual3D clickedVisual; |
| 42 : | ModelVisual3D visul3d; | ||
| 43 : | albert | 17 | |
| 44 : | albert | 19 | //rotate and pan object clicked |
| 45 : | private TranslateTransform3D _clickedTranslate ;//= new TranslateTransform3D(); | ||
| 46 : | private TranslateTransform3D _clickedTranslateOriginal;// = new TranslateTransform3D(); | ||
| 47 : | private RotateTransform3D _clickedRotate ;//= new RotateTransform3D(); | ||
| 48 : | albert | 17 | private AxisAngleRotation3D _clickedAxisAngleRotate = new AxisAngleRotation3D(); |
| 49 : | albert | 19 | Point3D _clickedCenterPosition; |
| 50 : | |||
| 51 : | albert | 16 | |
| 52 : | bool isTracking = false; | ||
| 53 : | |||
| 54 : | public CameraControl(PerspectiveCamera camera) | ||
| 55 : | { | ||
| 56 : | _camera = camera; | ||
| 57 : | albert | 17 | |
| 58 : | albert | 16 | _rotationTransform.Rotation = _rotation; |
| 59 : | albert | 17 | |
| 60 : | albert | 16 | _transform = new Transform3DGroup(); |
| 61 : | //_transform.Children.Add(_translate); | ||
| 62 : | _transform.Children.Add(_rotationTransform); | ||
| 63 : | // _transform.Children.Add(_scale); | ||
| 64 : | |||
| 65 : | albert | 19 | // _clickedRotate.Rotation = _clickedAxisAngleRotate; |
| 66 : | albert | 16 | } |
| 67 : | |||
| 68 : | /// <summary> | ||
| 69 : | /// A transform to move the camera or scene to the trackball's | ||
| 70 : | /// current orientation and scale. | ||
| 71 : | /// </summary> | ||
| 72 : | public Transform3DGroup Transform | ||
| 73 : | { | ||
| 74 : | get { return _transform; } | ||
| 75 : | } | ||
| 76 : | |||
| 77 : | #region Event Handling | ||
| 78 : | |||
| 79 : | /// <summary> | ||
| 80 : | /// The FrameworkElement we listen to for mouse events. | ||
| 81 : | /// </summary> | ||
| 82 : | public FrameworkElement EventSource | ||
| 83 : | { | ||
| 84 : | get { return _eventSource; } | ||
| 85 : | |||
| 86 : | set | ||
| 87 : | { | ||
| 88 : | if (_eventSource != null) | ||
| 89 : | { | ||
| 90 : | _eventSource.MouseWheel -= _eventSource_MouseWheel; | ||
| 91 : | _eventSource.MouseUp -= this.OnMouseUp; | ||
| 92 : | _eventSource.MouseMove -= this.OnMouseMove; | ||
| 93 : | _eventSource.MouseLeftButtonDown -= _eventSource_MouseLeftButtonDown; | ||
| 94 : | } | ||
| 95 : | _eventSource = value; | ||
| 96 : | _eventSource.MouseWheel += _eventSource_MouseWheel; | ||
| 97 : | _eventSource.MouseLeftButtonDown += new MouseButtonEventHandler(_eventSource_MouseLeftButtonDown); | ||
| 98 : | _eventSource.MouseUp += this.OnMouseUp; | ||
| 99 : | _eventSource.MouseMove += this.OnMouseMove; | ||
| 100 : | |||
| 101 : | } | ||
| 102 : | } | ||
| 103 : | |||
| 104 : | void _eventSource_MouseWheel(object sender, MouseWheelEventArgs e) | ||
| 105 : | { | ||
| 106 : | double scale = e.Delta / 1200.00; | ||
| 107 : | double distance = Point3D.Subtract(_cameraLookPoint, _camera.Position).Length; | ||
| 108 : | |||
| 109 : | albert | 20 | if (distance > 1024 || distance <= 10) |
| 110 : | albert | 16 | { |
| 111 : | if (touch == false) | ||
| 112 : | { | ||
| 113 : | touch = true; | ||
| 114 : | } | ||
| 115 : | } | ||
| 116 : | else | ||
| 117 : | { | ||
| 118 : | touch = false; | ||
| 119 : | } | ||
| 120 : | |||
| 121 : | if (touch == true) | ||
| 122 : | scale = -scale; | ||
| 123 : | albert | 17 | _camera.Position = new Point3D(_camera.Position.X + scale * _cameraLookDirection.X, |
| 124 : | _camera.Position.Y + scale * _cameraLookDirection.Y, | ||
| 125 : | _camera.Position.Z + scale * _cameraLookDirection.Z); | ||
| 126 : | albert | 16 | _camera.LookDirection = Point3D.Subtract(_cameraLookPoint, _camera.Position); |
| 127 : | } | ||
| 128 : | |||
| 129 : | void _eventSource_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) | ||
| 130 : | { | ||
| 131 : | Mouse.Capture(EventSource, CaptureMode.Element); | ||
| 132 : | |||
| 133 : | Point pclick = e.GetPosition(EventSource); | ||
| 134 : | HitTestResult hitresult = VisualTreeHelper.HitTest(EventSource, pclick); | ||
| 135 : | RayMeshGeometry3DHitTestResult result3d = hitresult as RayMeshGeometry3DHitTestResult; | ||
| 136 : | if (result3d == null) | ||
| 137 : | return; | ||
| 138 : | |||
| 139 : | albert | 19 | visul3d = result3d.VisualHit as ModelVisual3D; |
| 140 : | albert | 16 | if (visul3d == null) |
| 141 : | return; | ||
| 142 : | |||
| 143 : | albert | 17 | Transform3DGroup group = visul3d.Transform as Transform3DGroup; |
| 144 : | if (group != null) | ||
| 145 : | { | ||
| 146 : | albert | 19 | foreach (Transform3D tran in group.Children) |
| 147 : | albert | 17 | { |
| 148 : | albert | 19 | if (tran is RotateTransform3D) |
| 149 : | { | ||
| 150 : | _clickedRotate = new RotateTransform3D(); | ||
| 151 : | _clickedRotate = group.Children[0] as RotateTransform3D; | ||
| 152 : | if (_clickedRotate != null) | ||
| 153 : | { | ||
| 154 : | _clickedAxisAngleRotate = new AxisAngleRotation3D(); | ||
| 155 : | _clickedRotate.Rotation = _clickedAxisAngleRotate; | ||
| 156 : | } | ||
| 157 : | } | ||
| 158 : | else if (tran is TranslateTransform3D) | ||
| 159 : | _clickedTranslate = group.Children[1] as TranslateTransform3D; | ||
| 160 : | albert | 17 | } |
| 161 : | } | ||
| 162 : | albert | 19 | else |
| 163 : | return; | ||
| 164 : | albert | 16 | |
| 165 : | albert | 19 | |
| 166 : | albert | 17 | //for pan the object |
| 167 : | albert | 19 | //clickedVisual = visul3d; |
| 168 : | //visul3d.Transform = group; | ||
| 169 : | albert | 17 | _clickedTranslateOriginal = _clickedTranslate.Clone(); |
| 170 : | albert | 16 | |
| 171 : | albert | 17 | |
| 172 : | //for ALT + MOUSE + ROTATE | ||
| 173 : | albert | 16 | Petzold.Media3D.LineRange line; |
| 174 : | Petzold.Media3D.ViewportInfo.Point2DtoPoint3D(_eventSource as Viewport3D, pclick, out line); | ||
| 175 : | _cameraLookPoint = line.PointFromY(visul3d.Content.Bounds.Y); | ||
| 176 : | |||
| 177 : | _rotationTransform.CenterX = _cameraLookPoint.X; | ||
| 178 : | _rotationTransform.CenterY = _cameraLookPoint.Y; | ||
| 179 : | _rotationTransform.CenterZ = _cameraLookPoint.Z; | ||
| 180 : | |||
| 181 : | albert | 17 | //for rotate the object mouse clicked |
| 182 : | |||
| 183 : | albert | 19 | _clickedRotate.CenterX = _clickedCenterPosition.X = visul3d.Content.Bounds.Location.X + visul3d.Content.Bounds.SizeX / 2; |
| 184 : | _clickedRotate.CenterY = _clickedCenterPosition.Y = visul3d.Content.Bounds.Location.Y + visul3d.Content.Bounds.SizeY / 2; | ||
| 185 : | _clickedRotate.CenterZ = _clickedCenterPosition.Z = visul3d.Content.Bounds.Location.Z + visul3d.Content.Bounds.SizeZ / 2; | ||
| 186 : | albert | 17 | |
| 187 : | albert | 16 | _cameraLookDirection = Point3D.Subtract(_cameraLookPoint, _camera.Position); |
| 188 : | _camera.LookDirection = _cameraLookDirection; | ||
| 189 : | |||
| 190 : | albert | 17 | //TRACK BALL |
| 191 : | _previousPosition3D = ProjectToTrackball( | ||
| 192 : | EventSource.ActualWidth, | ||
| 193 : | EventSource.ActualHeight, | ||
| 194 : | _previousPosition2D); | ||
| 195 : | |||
| 196 : | albert | 16 | isTracking = true; |
| 197 : | _eventSource.CaptureMouse(); | ||
| 198 : | _eventSource.Focus(); | ||
| 199 : | e.Handled = true; | ||
| 200 : | } | ||
| 201 : | |||
| 202 : | private void OnMouseUp(object sender, MouseEventArgs e) | ||
| 203 : | { | ||
| 204 : | Mouse.Capture(EventSource, CaptureMode.None); | ||
| 205 : | isTracking = false; | ||
| 206 : | |||
| 207 : | albert | 20 | //Transform3DGroup clickedtransformGroup = new Transform3DGroup(); |
| 208 : | //clickedtransformGroup.Children.Add(_clickedRotate); | ||
| 209 : | //clickedtransformGroup.Children.Add(_clickedTranslate); | ||
| 210 : | albert | 19 | |
| 211 : | albert | 20 | //visul3d.Transform = clickedtransformGroup; |
| 212 : | albert | 19 | |
| 213 : | albert | 16 | _eventSource.ReleaseMouseCapture(); |
| 214 : | _eventSource.Cursor = Cursors.Arrow; | ||
| 215 : | } | ||
| 216 : | |||
| 217 : | private void OnMouseMove(object sender, MouseEventArgs e) | ||
| 218 : | { | ||
| 219 : | Point currentPosition = e.GetPosition(EventSource); | ||
| 220 : | |||
| 221 : | if (e.RightButton == MouseButtonState.Pressed && (Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.RightShift))) | ||
| 222 : | { | ||
| 223 : | LookUpDown(currentPosition); | ||
| 224 : | } | ||
| 225 : | else if (e.LeftButton == MouseButtonState.Pressed && (Keyboard.IsKeyDown(Key.LeftAlt) || Keyboard.IsKeyDown(Key.RightAlt))) | ||
| 226 : | { | ||
| 227 : | if (isTracking) | ||
| 228 : | { | ||
| 229 : | _eventSource.Cursor = Cursors.None; | ||
| 230 : | Focus(currentPosition); | ||
| 231 : | } | ||
| 232 : | } | ||
| 233 : | else if (e.RightButton == MouseButtonState.Pressed && Keyboard.IsKeyDown(Key.Q)) | ||
| 234 : | { | ||
| 235 : | CameraPanUP(currentPosition); | ||
| 236 : | } | ||
| 237 : | albert | 17 | else if (e.RightButton == MouseButtonState.Pressed && Keyboard.IsKeyDown(Key.A)) |
| 238 : | { | ||
| 239 : | albert | 20 | //TODO: |
| 240 : | albert | 17 | CameraPanLeft(currentPosition); |
| 241 : | } | ||
| 242 : | else if (e.LeftButton == MouseButtonState.Pressed && (Keyboard.IsKeyDown(Key.LeftCtrl) || Keyboard.IsKeyDown(Key.RightCtrl)) | ||
| 243 : | && (Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.RightShift))) | ||
| 244 : | { | ||
| 245 : | if (isTracking) | ||
| 246 : | albert | 20 | { |
| 247 : | _eventSource.Cursor = Cursors.None; | ||
| 248 : | albert | 17 | RotateObject(currentPosition); |
| 249 : | albert | 20 | } |
| 250 : | albert | 17 | } |
| 251 : | albert | 16 | else if (e.LeftButton == MouseButtonState.Pressed && (Keyboard.IsKeyDown(Key.LeftCtrl) || Keyboard.IsKeyDown(Key.RightCtrl))) |
| 252 : | { | ||
| 253 : | albert | 20 | if (isTracking) |
| 254 : | { | ||
| 255 : | _eventSource.Cursor = Cursors.None; | ||
| 256 : | PanObject(currentPosition); | ||
| 257 : | } | ||
| 258 : | albert | 16 | } |
| 259 : | albert | 17 | |
| 260 : | albert | 16 | _previousPosition2D = currentPosition; |
| 261 : | } | ||
| 262 : | |||
| 263 : | albert | 17 | private void RotateObject(Point currentPosition) |
| 264 : | { | ||
| 265 : | albert | 19 | Vector3D currentPosition3D = ProjectToTrackball(EventSource.ActualWidth, EventSource.ActualHeight, currentPosition); |
| 266 : | albert | 17 | |
| 267 : | Vector3D axis = Vector3D.CrossProduct(_previousPosition3D, currentPosition3D); | ||
| 268 : | double angle = Vector3D.AngleBetween(_previousPosition3D, currentPosition3D); | ||
| 269 : | Quaternion delta = new Quaternion(axis, -angle); | ||
| 270 : | |||
| 271 : | // Get the current orientantion from the RotateTransform3D | ||
| 272 : | albert | 19 | Quaternion q = new Quaternion(_clickedAxisAngleRotate.Axis, _clickedAxisAngleRotate.Angle); |
| 273 : | albert | 17 | |
| 274 : | // Compose the delta with the previous orientation | ||
| 275 : | q *= delta; | ||
| 276 : | |||
| 277 : | // Write the new orientation back to the Rotation3D | ||
| 278 : | albert | 20 | |
| 279 : | if (_clickedAxisAngleRotate.Angle >= 360||_clickedAxisAngleRotate.Angle<=-360) | ||
| 280 : | albert | 19 | _clickedAxisAngleRotate.Angle = 0; |
| 281 : | albert | 17 | |
| 282 : | albert | 20 | _clickedAxisAngleRotate.Axis = q.Axis; |
| 283 : | _clickedAxisAngleRotate.Angle -= q.Angle; | ||
| 284 : | |||
| 285 : | |||
| 286 : | albert | 17 | _previousPosition3D = currentPosition3D; |
| 287 : | } | ||
| 288 : | |||
| 289 : | private Vector3D ProjectToTrackball(double width, double height, Point point) | ||
| 290 : | { | ||
| 291 : | double x = point.X / (width / 2); // Scale so bounds map to [0,0] - [2,2] | ||
| 292 : | double y = point.Y / (height / 2); | ||
| 293 : | |||
| 294 : | x = x - 1; // Translate 0,0 to the center | ||
| 295 : | y = 1 - y; // Flip so +Y is up instead of down | ||
| 296 : | |||
| 297 : | double z2 = 1 - x * x - y * y; // z^2 = 1 - x^2 - y^2 | ||
| 298 : | double z = z2 > 0 ? Math.Sqrt(z2) : 0; | ||
| 299 : | |||
| 300 : | return new Vector3D(x, y, z); | ||
| 301 : | } | ||
| 302 : | |||
| 303 : | #endregion Event Handling | ||
| 304 : | |||
| 305 : | albert | 20 | |
| 306 : | albert | 17 | private void CameraPanLeft(Point currentPosition) |
| 307 : | { | ||
| 308 : | LineRange range; | ||
| 309 : | ViewportInfo.Point2DtoPoint3D(_eventSource as Viewport3D, currentPosition, out range); | ||
| 310 : | albert | 19 | Point3D pointNew = range.PointFromY(_clickedCenterPosition.Y); |
| 311 : | albert | 17 | |
| 312 : | //_camera.Position. | ||
| 313 : | } | ||
| 314 : | |||
| 315 : | albert | 16 | private void PanObject(Point currentPosition) |
| 316 : | { | ||
| 317 : | albert | 17 | double scaley = currentPosition.Y - _previousPosition2D.Y; |
| 318 : | scaley = scaley / 100.00; | ||
| 319 : | albert | 16 | |
| 320 : | albert | 17 | |
| 321 : | double scalex = currentPosition.X - _previousPosition2D.X; | ||
| 322 : | scalex = scalex / 100.00; | ||
| 323 : | |||
| 324 : | //double scalez = Math.Sqrt(scalex * scalex + scaley * scaley); | ||
| 325 : | |||
| 326 : | albert | 16 | LineRange range; |
| 327 : | ViewportInfo.Point2DtoPoint3D(_eventSource as Viewport3D, currentPosition, out range); | ||
| 328 : | albert | 19 | Point3D pointNew = range.PointFromY(_clickedCenterPosition.Y); |
| 329 : | albert | 17 | |
| 330 : | albert | 16 | Vector3D vectMouse = pointNew - _cameraLookPoint; |
| 331 : | albert | 19 | //vectMouse = Vector3D.Multiply(_cameraLookDirection, visul3d.Transform.Value); |
| 332 : | albert | 20 | _clickedTranslate.OffsetX = _clickedTranslateOriginal.OffsetX + vectMouse.X; |
| 333 : | _clickedTranslate.OffsetY = _clickedTranslateOriginal.OffsetY + vectMouse.Y; | ||
| 334 : | _clickedTranslate.OffsetZ = _clickedTranslateOriginal.OffsetZ + vectMouse.Z;// vectMouse.Z; | ||
| 335 : | |||
| 336 : | // //vectMouse = Vector3D.Multiply(_cameraLookDirection, visul3d.Transform.Value); | ||
| 337 : | //_clickedTranslate.OffsetX += scalex * vectMouse.X;// _clickedTranslateOriginal.OffsetX + vectMouse.X; | ||
| 338 : | albert | 19 | // _clickedTranslate.OffsetY += scaley * vectMouse.Y;// _clickedTranslateOriginal.OffsetY + vectMouse.Y; |
| 339 : | albert | 20 | // //_clickedTranslate.OffsetZ += scaley * vectMouse.Z;// _clickedTranslateOriginal.OffsetZ + vectMouse.Z;// vectMouse.Z; |
| 340 : | albert | 16 | |
| 341 : | albert | 19 | |
| 342 : | albert | 20 | //mm += vectMouse.Y.ToString() + "/n"; |
| 343 : | albert | 19 | |
| 344 : | albert | 16 | } |
| 345 : | |||
| 346 : | |||
| 347 : | albert | 19 | |
| 348 : | albert | 16 | private void LookUpDown(Point currentPosition) |
| 349 : | { | ||
| 350 : | double scale = currentPosition.Y- _previousPosition2D.Y; | ||
| 351 : | scale = scale/5; | ||
| 352 : | _camera.LookDirection = new Vector3D(_camera.LookDirection.X, _camera.LookDirection.Y, _camera.LookDirection.Z + scale); | ||
| 353 : | } | ||
| 354 : | |||
| 355 : | string mm = ""; | ||
| 356 : | bool touch = false; | ||
| 357 : | private void Focus(Point currentPosition) | ||
| 358 : | { | ||
| 359 : | double yDelta = currentPosition.Y - _previousPosition2D.Y; | ||
| 360 : | albert | 20 | double scale = yDelta / 100.0; |
| 361 : | albert | 16 | //Maybe this part need replaced by collision detection method |
| 362 : | double distance = Point3D.Subtract(_cameraLookPoint, _camera.Position).Length; | ||
| 363 : | albert | 20 | if (distance > 1024 || distance <= 1) |
| 364 : | albert | 16 | { |
| 365 : | if (touch == false) | ||
| 366 : | touch = true; | ||
| 367 : | } | ||
| 368 : | else | ||
| 369 : | { | ||
| 370 : | touch = false; | ||
| 371 : | } | ||
| 372 : | if (touch == true) | ||
| 373 : | scale = -scale; | ||
| 374 : | |||
| 375 : | _camera.Position = new Point3D(_camera.Position.X - scale * _cameraLookDirection.X, _camera.Position.Y - scale * _cameraLookDirection.Y, _camera.Position.Z - scale * _cameraLookDirection.Z); | ||
| 376 : | |||
| 377 : | //_translate.OffsetX -= scale * _cameraLookDirection.X;// _camera.LookDirection.X; | ||
| 378 : | //_translate.OffsetY -= scale * _cameraLookDirection.Y;//_camera.LookDirection.Y; | ||
| 379 : | //_translate.OffsetZ -= scale * _cameraLookDirection.Z;//_camera.LookDirection.Z; | ||
| 380 : | |||
| 381 : | _camera.LookDirection = Point3D.Subtract(_cameraLookPoint, _camera.Position); | ||
| 382 : | |||
| 383 : | double axisAngle = currentPosition.X - _previousPosition2D.X; | ||
| 384 : | double angletimes = axisAngle; | ||
| 385 : | |||
| 386 : | albert | 20 | if ( _rotation.Angle- angletimes <= -360) |
| 387 : | albert | 16 | _rotation.Angle = 0; |
| 388 : | _rotation.Axis = new Vector3D(0, 0, 1); | ||
| 389 : | albert | 20 | _rotation.Angle -= axisAngle; |
| 390 : | albert | 16 | } |
| 391 : | |||
| 392 : | public HitTestResultBehavior HitTestCallback(HitTestResult result) | ||
| 393 : | { | ||
| 394 : | if (result.VisualHit != null) | ||
| 395 : | { | ||
| 396 : | return HitTestResultBehavior.Stop; | ||
| 397 : | } | ||
| 398 : | return HitTestResultBehavior.Continue; | ||
| 399 : | } | ||
| 400 : | |||
| 401 : | private void CameraPanUP(Point currentPosition) | ||
| 402 : | { | ||
| 403 : | double yDelta = currentPosition.Y - _previousPosition2D.Y; | ||
| 404 : | double xDelta = currentPosition.X - _previousPosition2D.X; | ||
| 405 : | albert | 20 | double scale = yDelta / 5.00; |
| 406 : | albert | 16 | |
| 407 : | _camera.Position = new Point3D(_camera.Position.X, _camera.Position.Y, _camera.Position.Z + scale); | ||
| 408 : | } | ||
| 409 : | |||
| 410 : | |||
| 411 : | } | ||
| 412 : | |||
| 413 : | |||
| 414 : | } |
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