Drag mouse to rotate model. Hold shift key or use mouse wheel
to zoom it (canvas is matched to the browser window). it is the number
of MC iterations per frame. Uncheck spin to see vortex lines.
GPU based Monte-Carlo simulation of the 3D XY model on the cubic
64×64×64 grid. Different colors correspond to different spin
phases. Vortex cores are white. They make closed loops and collapse in a while.
See Vortices in the XY model.