hyperpoly java demo

For faster rendering, turn off Z-buffering (this uses native fillPoly instead of Java rasterizing).

With Z-buffering enabled, faces are rasterized with interpolated Z-values, done with interpreted Java code.

Only Java 1.1 was used: no libraries or installed extras are needed.

On my PC, I get between 20 and 35 fps with this demo (lighting and z-buffering enabled).  Not bad for an interpreted language.