public override void Update(float dt)
{
base.Update(dt);
SlimDX.Vector3 ForwardDir = LookAt - Position;
SlimDX.Vector3 RightDir = SlimDX.Vector3.Cross(ForwardDir, Up) * -1.0f;
BasePosition += ((ForwardDir * _forwardSpeed * FlyRate) + (RightDir * _rightSpeed * FlyRate)) * dt * ((_isShiftDown) ? 0.03f : 1.0f);
// Get camera position from polar coords, plus camera origin
var x = MathF.SinF(_phi) * MathF.CosF(_theta);
var z = MathF.SinF(_phi) * MathF.SinF(_theta);
var y = MathF.CosF(_phi);
Position = BasePosition;
LookAt = Position + new SlimDX.Vector3(x, y, z);
}