PlayerUnit(Gamestate oldState, GamestateBuilder newState)
{
Assert.Ref(oldState, newState);
PlayerUnit oldUnit = oldState.PlayerUnit;
texture = oldUnit.texture;
InputDevice device = oldState.Input.Devices[oldUnit.inputDevice];
RigidBody body = (RigidBody)(oldState.Physics.PhysicsBodies[oldUnit.rigidBody]);
Sprite spr = (Sprite)(oldState.Video.Drawables[oldUnit.sprite]);
float x = device.GetAxisFrac("Horizontal");
float y = device.GetAxisFrac("Vertical");
Vector2 move = new Vector2(x, y).ClampMagnitude(0, 1) * accel;
body = body.AddImpulse(move);
inputDevice = newState.Input.AddDevice(device);
rigidBody = newState.Physics.AddPhysicsObject(body);
sprite = newState.Video.AddDrawable(spr.Reposition(body.Position));
newState.Audio.SetListenerPosition(body.Position);
Window window = oldState.Video.Windows[0];
Vector2 centerOffset = new Vector2(window.Rect.W / 2, window.Rect.H / 2);
WorldPoint cameraPos = body.Position.PixelTranslate(-centerOffset + new Vector2(16, 16));
newState.Video.SetCamera(new Camera(cameraPos));
}