grafx - Extensible Java Graphics Package Code

Improving the performance of line drawing algorithm.

Finished LineRotate.

Starting new test class, LineRotate.

Changing order of some boolean && or || to make it more symmetric, readable.

Finished with the line drawing subroutines.

Adding one more of the line drawing subroutines. Seems to work.

Fixing a wrong increment for 'dd'.

In line drawing routines, changing cases of " += -value " to " -= value ".
It's much easier to follow and to copy this way.

Trying to handle one more type of line. Not culling pixel by pixel in the z
with existing line drawer.

Reverting back to clipping polygons along z axis in the post-normalized state.