TreeJuxtaposer video platforms shown java 1.4, GL4Java 2.7 bindings for OpenGL Windows 2.4 GHz P3, nVidia Quadro4 700XGL 1.1GB java heap window sizes 1280x1024, 3800x2400 Linux 3.1 GHz P4, nVidia GeForce FX 5800 Ultra 1.7GB java heap window size 800x600 18