Vorticity is a gpu-accelerated flow field. The particles in the flow field orbit around a set of points that move around over time. Controls: Click and drag to push particles away. Press the space bar to pause the simulation, and again to resume. While paused, you can press "n" to advance the simulation a single step. Press "r" to restart the simulation (if you change the resolution of the screen after the page loads, you will need to restart to update the resolution).