private void CameraOrient(Direction?d)
{
PerspectiveCamera camera = (PerspectiveCamera)_viewport.Camera;
if (d == null)
{
// Stops the animation
// testing _cameraOrienting is not reliable
// if (_cameraOrienting && _viewport.Camera.HasAnimatedProperties)
if (_viewport.Camera.HasAnimatedProperties)
{
Vector3D currentDirection = camera.LookDirection;
camera.ApplyAnimationClock(PerspectiveCamera.LookDirectionProperty, null);
camera.LookDirection = currentDirection;
//_cameraOrienting = false;
}
}
else
{
Vector3D v = camera.LookDirection;
Vector3D vY = new Vector3D(0.0, 1.0, 0.0);
Vector3D vRelativeHorizontalAxis = Vector3D.CrossProduct(v, vY);
Vector3D vRelativeVerticalAxis = Vector3D.CrossProduct(v, vRelativeHorizontalAxis);
double targetAngle = 45.0; // MUST be under 90.0 (if 90.0, Forward and Forward|Left have the same target vector)
// this code supports direction combinations
if ((d & Direction.Forward) == Direction.Forward)
{
v = Helper3D.RotateVector(v, targetAngle, vRelativeHorizontalAxis);
}
if ((d & Direction.Backward) == Direction.Backward)
{
v = Helper3D.RotateVector(v, -targetAngle, vRelativeHorizontalAxis);
}
if ((d & Direction.Left) == Direction.Left)
{
v = Helper3D.RotateVector(v, -targetAngle, vRelativeVerticalAxis);
}
if ((d & Direction.Right) == Direction.Right)
{
v = Helper3D.RotateVector(v, targetAngle, vRelativeVerticalAxis);
}
if (v != camera.LookDirection)
{
_cameraLookDirectionAnimation.To = v;
camera.ApplyAnimationClock(PerspectiveCamera.LookDirectionProperty, _cameraLookDirectionAnimation.CreateClock());
//_cameraOrienting = true;
}
}
}
private void CameraZoom(Direction?d)
{
PerspectiveCamera camera = (PerspectiveCamera)_viewport.Camera;
if (d == null)
{
// Stops the animation
// testing _cameraZooming is not reliable
// if (_cameraZooming && _viewport.Camera.HasAnimatedProperties)
if (_viewport.Camera.HasAnimatedProperties)
{
double fieldOfView = camera.FieldOfView;
camera.ApplyAnimationClock(PerspectiveCamera.FieldOfViewProperty, null);
camera.FieldOfView = fieldOfView;
//_cameraZooming = false;
}
}
else
{
// PerspectiveCamera.FieldOfView must be between 0 and 180 degrees
if (d == Direction.Forward)
{
_cameraZoomAnimation.To = 0.1;
}
else if (d == Direction.Backward)
{
_cameraZoomAnimation.To = 179.9;
}
if ((d == Direction.Forward) ||
(d == Direction.Backward))
{
camera.ApplyAnimationClock(PerspectiveCamera.FieldOfViewProperty, _cameraZoomAnimation.CreateClock());
//_cameraZooming = true;
}
}
}
private void CameraTranslate(Direction?d)
{
PerspectiveCamera camera = (PerspectiveCamera)_viewport.Camera;
if (d == null)
{
// Stops the animation
// testing _cameraTranslating is not reliable
// if (_cameraTranslating && camera.HasAnimatedProperties)
if (camera.HasAnimatedProperties)
{
Point3D currentPosition = camera.Position;
camera.ApplyAnimationClock(PerspectiveCamera.PositionProperty, null);
camera.Position = currentPosition;
// _cameraTranslating = false;
}
}
else
{
Vector3D v = camera.LookDirection;
Vector3D vY = new Vector3D(0.0, 1.0, 0.0);
Vector3D vRelativeHorizontalAxis = Vector3D.CrossProduct(v, vY);
Vector3D vRelativeVerticalAxis = Vector3D.CrossProduct(v, vRelativeHorizontalAxis);
if (d != Direction.Forward)
{
AxisAngleRotation3D rotation = new AxisAngleRotation3D();
switch (d)
{
case Direction.Forward | Direction.Left:
rotation.Axis = vRelativeVerticalAxis;
rotation.Angle = -45.0;
break;
case Direction.Left:
rotation.Axis = vRelativeVerticalAxis;
rotation.Angle = -90.0;
break;
case Direction.Backward | Direction.Left:
rotation.Axis = vRelativeVerticalAxis;
rotation.Angle = -135.0;
break;
case Direction.Backward:
rotation.Axis = vRelativeVerticalAxis;
rotation.Angle = 180.0;
break;
case Direction.Backward | Direction.Right:
rotation.Axis = vRelativeVerticalAxis;
rotation.Angle = 135.0;
break;
case Direction.Right:
rotation.Axis = vRelativeVerticalAxis;
rotation.Angle = 90.0;
break;
case Direction.Forward | Direction.Right:
rotation.Axis = vRelativeVerticalAxis;
rotation.Angle = 45.0;
break;
case Direction.Up:
rotation.Axis = vRelativeHorizontalAxis;
rotation.Angle = 90.0;
break;
case Direction.Down:
rotation.Axis = vRelativeHorizontalAxis;
rotation.Angle = -90.0;
break;
}
RotateTransform3D transform = new RotateTransform3D(rotation);
v = transform.Transform(camera.LookDirection);
}
Point3D p = new Point3D(v.X, v.Y, v.Z);
_cameraPositionAnimation.By = p;
//_cameraTranslating = true;
camera.ApplyAnimationClock(PerspectiveCamera.PositionProperty, _cameraPositionAnimation.CreateClock());
}
}
