Periodic Bathymetry

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Periodic bathymetry tiles, interior has been hollowed out to allow insertion of metal bars (as ballast) and instrumentation. This is intended for use in fluid dynamic demonstrations and experiments, for example at the bottom of http://paoc.mit.edu/labguide/apparatus.html. Small openings in top surface allow for air to escape the hollowed interior and sensors to be inserted in the flow. Both *.stl and the OpenSCAD (http://www.openscad.org/) source files are included, please modify the generating function to suit your needs. Instructions The openscad file generates bathymetry as given by a product of cosines but any arbitrary bathymetry can be used if the zxy function function zxy(xi,yj) = 2+cos(xi360/10.)cos(yj*360/10.); is changed. Alternatively you can remove the comment "//" on the line using zz[i][j] // bathy([zz[j][i],zz[j][i+1],zz[j+1][i+1],zz[j+1][i]],thesize); and comment out the line using zxy(x,y) bathy([zxy(x[i],y[j]),zxy(x[i+1],y[j]),zxy(x[i+1],y[j+1]),zxy(x[i],y[j+1])],thesize); and the bathymetry is given by the zz matrix.