[sdljava-users] Proposal: SDLPoint, SDLSize, and SDLRect

[Chris D. <Des...@nt...>]

I've had a look at the AWT class for Rectangle, but that is far too 
complex for what we need, and it has lots of overhead associated with 
it. Although it does use Point objects in some situations, if you used 
it thoughout your code, and combined it with the Rectangle class, there 
would be a lot of overhead from removing the X and Y coordinates from 
the Point objects to use in a Rectangle object elsewhere, and then 
recreating the Point object again unnecessarily.

This is because the Rectangle class does not store its X and Y 
coordiantes in a Point object, nor does it store Width and Height values 
in a Size object (is there a better name, such as Magnitude?).

I propose that we do recreate these classes in a simplified AWT style, 
as has been suggested, but make various improvements that would be 
better suited to the scenario of game development.

What I am proposing is the following class hierarchy:

    SDLPoint:
       int x
       int y

       constuctor(int x, int y): ...

       int getX()
       int getY()

    SDLSize:
       int width
       int height

       constuctor(int width, int height): ...

       int getWidth()
       int getHeight()      

    SDLRect:
       SDLPoint topLeft
       SDLSize  size
      
       constuctor(SDLSize): x = 0, y = 0, ...
       constuctor(SDLPoint, SDLSize): ...
      
       SDLPoint getTopLeft()
       SDLPoint setTopLeft()
       SDLPoint getTopRight()
       SDLPoint getBottomLeft()
       SDLPoint getBottomRight()
       SDLPoint getCenter()
       SDLPoint setCenter()
       SDLSize  getSize()

If you have anything to comment on this hierarchy, then please do so. 
Anything additional can be integrated, or added at a later time. This is 
just a small proposal.

Regards,
Chris

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