opengl This part is responsible for the pseudo3D rendering through OpenGl and gives methods to adapt the view. There is a last parameter which controls when render is done. There are two states : whenever a changing occurs (in fact when the OpenGLAskForReDraw signal is received) or only the OpenGLForceReDraw is received. Except when high performances are required, this module never makes a redraw by itself, even when parameters such as the camera position are changed. The redraw must be asked by the client by emitting the OpenGLAskForReDraw signal or the OpenGLForceReDraw signal. This is to avoid situations when the client makes different changes but want just only one redraw at the end. All set methods return a boolean which informs the client of the opportunity to redraw after the set occurs. For example, if the client call a set change on theta or phi but the server returns FALSE, it means that not emission of OpenGLAskForReDraw is needed (for example because theta or phi had already these values). @width: @height: @data: @width: @height: @data: @value: @Returns: @Returns: @bool: @Returns: @Returns: @material: @rgba: @Returns: