K φ° Xo Yo γ delay it
framerate

Drag mouse to rotate model. 0.7 < Xo,Yo < 2.5.

Travelling wave packets. You see dynamics of the wave packet
    u(r) = exp(-(r - Ro)2/a2) cos kr,     kx = k cos φ, ky =   k sin φ
moving in the k direction.


WebGL Demos     updated 15 August 2010