rm

mrdna/readers/unittest/potentials/null.dx

-object 1 class gridpositions counts  2 2 2
-origin -2500.0 -2500.0 -2500.0
-delta  5000 0.000000 0.000000
-delta  0.000000 5000 0.000000
-delta  0.000000 0.000000 5000
-object 2 class gridconnections counts  2 2 2
-object 3 class array type float rank 0 items 8 data follows
-0.0	0.0	0.0	
-0.0	0.0	0.0	
-0.0	0.0	
-attribute "dep" string "positions"
-object "density" class field 
-component "positions" value 1
-component "connections" value 2
-component "data" value 3