GLgraph is an interactive OpenGL based function grapher for
Linux written in Perl. It visualizes any mathematical
function in 1, 2 or 3 unkowns (x,z,t) in a 2D, 3D or 4D
wireframe or solid surface, optionally with axis. It creates
an animation after one time periode. GLgraph has an command
line interface to input a function, to specify the minimum
and maximum plotting bound and more. It can be interactively
controlled with the keyboard.