private void _primaryGrid_MouseMove(object sender, MouseEventArgs e)
{
Point newMousePosition = e.GetPosition(_viewport3D1);
if (e.LeftButton == MouseButtonState.Pressed)
{
if (!_primaryGrid.IsMouseCaptured)
{
_primaryGrid.CaptureMouse();
}
double deltaX = ModelViewerHelper.ToRad(newMousePosition.X - _oldPosition.X);
_angleXRad -= deltaX;
double deltaY = newMousePosition.Y - _oldPosition.Y;
_angleYDegree += deltaY;
UpdateCamera();
}
else if (e.RightButton == MouseButtonState.Pressed)
{
if (!_primaryGrid.IsMouseCaptured)
{
_primaryGrid.CaptureMouse();
}
double deltaX = newMousePosition.X - _oldPosition.X;
double deltaZ = newMousePosition.Y - _oldPosition.Y;
double distX = _distance * 0.0013 * deltaX;
double distZ = _distance * 0.0013 * deltaZ;
_lookAt.X += -distX *Math.Cos(_angleXRad) - distZ * Math.Sin(_angleXRad);
_lookAt.Z += distX * Math.Sin(_angleXRad) - distZ * Math.Cos(_angleXRad);
UpdateCamera();
}
_oldPosition = newMousePosition;
}
public void UpdateCamera()
{
Dispatcher.Invoke(new Action(delegate {
_angleYDegree = _angleYDegree > 89 ? 89 : _angleYDegree;
_angleYDegree = _angleYDegree < -89 ? -89 : _angleYDegree;
double subDistance = _distance * Math.Cos(ModelViewerHelper.ToRad(_angleYDegree));
_cameraPosition.Y = _distance * Math.Sin(ModelViewerHelper.ToRad(_angleYDegree));
_cameraPosition.X = subDistance * Math.Sin(_angleXRad);
_cameraPosition.Z = subDistance * Math.Cos(_angleXRad);
_cameraPosition += _lookAt;
_primaryCamera.Position = new Point3D(_cameraPosition.X, _cameraPosition.Y, _cameraPosition.Z);
_primaryCamera.LookDirection = _lookAt - _cameraPosition;
if (_modelLight.Content is DirectionalLight)
{
((DirectionalLight)_modelLight.Content).Direction = _lookAt - _cameraPosition;
}
}));
}
