K φ° Xo Yo delay fps
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Two slit interference. Lite on 512×512 lattice

You see dynamics of the travelling wave packet
    u(r) = exp(-(r - Ro )2/a2) cos kr,     kx = k cos φ, ky =   k sin φ
moving in the k direction.
Simulations on GPU
updated 17 Apr 2011