grafx - Extensible Java Graphics Package Code

Here is a first pass at changing RasterDepthPixBuff from an interface to an
abstract class. This is so that default values could be chosen in most cases,
without the need to override almost ten methods.

Adding a few lightweight comments.

I think this is the correct way to handle clip and clear().

Going the other way in changing DEFAULT_MAX_FPS to 500. This makes the game
more responsive.

Changing DEFAULT_MAX_FPS from 200 to 125.

Starting to implement m_objShiftX and m_objShiftY. Still have to do the clip
and clear().

Adding m_scanSize, and using it. Defined pixIndex(). Using it.

Renaming 'yPixOffset' to just 'pixOffset'. It's more accurate.

Finished optimizing all fillPolygon() routines.

The 3D rendering performance is really superb. Now need to optimize GOURAUD.