# Fundamental Help on notations

Hello

I need some help to understand the notation as I am still learning YADE.

Fundamental Help on notations as I need to modify 2D problem to 3D. The example is from trunk: prepareRVE.py

sp = pack.SpherePack()

size = .24

sp.makeCloud(

sp.toSimulation()

O.cell.hSize = Matrix3(size,0,0, 0,size,0, 0,0,.1)

When I run the above, it is 2D problem : YADE message : min-max volume is null an assume the packing is 2D

So I what is the MinCorner (0,0,0) mean : is that x, y z? and what is the unit, I assume all units is in meter?

as for Matrix3 , is that i, j k ? i is x, j is y and k is z?

If I want to edited that to 3D problem but does not work..

sp = pack.SpherePack()

size = .24

sp.makeCloud(

sp.toSimulation()

O.cell.hSize = Matrix3(size,0,0, 0,size,0, 0,0,.1)

same for

sp = pack.SpherePack()

size = .24

sp.makeCloud(

sp.toSimulation()

O.cell.hSize = Matrix3(size,0,0, 0,size,0, 0,0,.1)

Also question how the size is estimate to 0.24

Thanks and best regards

Surej.

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