= Element2D =
An abstract !SuperClass, that knows how to be drawn onto a 2-dimensional screen.
 
  * __definition__:
{{{
#!cpp
...
#include "element_2d.h"
...
//! A class that enables the
class Crosshair : public PNode, public Element2D, public EventListener {
...
}
}}}
  * __usage__:
{{{
#!cpp
    void setPosition2D(int xCoord, int yCoord);
    void setAlignment(E2D_ALIGNMENT alignment) { this->alignment = alignment; };
    void setLayer(E2D_LAYER layer);
    void setVisibility(bool visible) { this->visible = visible; };
    void setBindNode(const PNode* bindNode) { this->bindNode = bindNode; };
}}}
   These functions are quite selfexplanatory. Important are two things:
    1. you set only a relative-position with setPosition2D
    2. when you set a bindNode, the 2D-element will follow the BindNode's Position, trying to approximate it.