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;
}
}
}
