Greetings people!

I can creat a 100 object matrix by using a while loop as follows:

#declare x1 =  0;
#while  (x1 < 10)
#declare z1 =  0;
#while  (z1 < 10)
object{Obj translate <x1,0,z1>}
#declare z1 = z1 + 1;
#end
#declare x1 = x1 + 1;
#end

How would I create the same sort of grid where evey other
row in the z direction is offset by 0.5 in the x direction.
My intention is easying the pain of placing shingles on a
roof where it is important that the cracks of overlapping
rows do not line up while back filling the spaces that would
be left by doing so.

Any suggestions ?

Ken Tyler

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