I would disagree here.

Just because no one else will use your code doesn''t mean that you shouldn''t attempt to code it properly. When you have problems writing easy to use classes (especially in a simple / well defined case like this) it ususally means you don''t have a complete understanding of the situation.

Usually modularization (having two classes) will be more efficient than a non-modularized approach (1 huge class) simply because its easier to see the optimzations. As well, if there are a number of differences between the two classes the inheritance appraoch will most likely be more effcient because you''ll probably have a bunch of ''if'' statments running around in the code depending on whether or not your drawing an animated sprite, or a normal sprite. On the other hand if the animated sprite is only slightly different (maybe only a slight extension to the loading function or whatever), than the implicit pointer derefence will add a slight overhead and it would probably be better to go with one large class (though trust me when I say that this is an extreme case, cause even 1 extra ''if'' statement will take longer time than the pointer derefence).

Now one thing to consider is that in either case the actual drawing code will probably be of a significant number of magnitudes slower than either case, so code it in whatever way is easier for you to understand (I would choose the two - class approach as it allows you alot more flexibility in the future).