grafx - Extensible Java Graphics Package Code

Implemented the line clipper.

Reducing sizes of arrays to not have duplicates.

Back face culling on DRAW_VERTICES. Little by little.

Drawing vertices first, in Donut.

Some little changes here and there. A big change is that the pixel is first
come takes precedence in the z buffer. Other stuff drawn later at same z value
will not be drawn.

Removing some error checking code in Donut.

Fixing the bug in drawPoint(), which was related to normals and ununiform
scale.

Making xCoord and yCoord 'final' in drawPoint() in RasterDepthGraphics.

Adding a bit of temporary error checking code which makes sure that the facet
normals are correct.

First pass at revisiting the drawing of polygon vertices. Not tested, but
compiles.