nuclear@2: metasurf example: metaballs
nuclear@2: 
nuclear@2: - move the active metaball with the spaceball or the mouse
nuclear@2: - move the camera with the mouse by pressing any modifier (shift/ctrl/alt/whatever)
nuclear@2: - spaceball buttons or spacebar on the keyboard changes the active metaball
nuclear@2: - toggle fullscreen with the 'f' key
nuclear@2: - pass -s on the command line for stereoscopic rendering (then toggle with the 's' key)
nuclear@2: 
nuclear@2: If you're on an old system which doesn't support GLSL shaders, uncomment the
nuclear@2: "nosdr = ..." line in the Makefile.