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[Jan Stránský <question694288@xxxxxxxxxxxxxxxxxxxxx>]

Question #694288 on Yade changed:
https://answers.launchpad.net/yade/+question/694288

    Status: Open => Answered

Jan Stránský proposed the following answer:
> Here's the MWE

IOError: [Errno 2] No such file or directory:
'mypacking.spheresisoCompression'

> for i in range(0,len(packing)):

do you need "i"? If not, it is more understandable and clean to iterate bodies directly
###
for b in packing:
    if b.state.pos[1] > height and b.state.pos[1] < 2*height:
        b.state.pos[0] = b.state.pos[0] + 5*thickness
        ...
###

> ### distribute it to desired position <-- not sure how to do this part

MWE (following OP):
###
# (0,0,0)-(5,5,5) packing
spheres = [sphere((x,y,z),.5) for x in range(6) for y in range(6) for z in range(6)]

# fitler (1,1,1)-(4,4,4)
def sphereWanted(b):
    x,y,z = b.state.pos
    return x >= 1 and x <= 4 and y >= 1 and y <= 4 and z >= 1 and z <= 4
spheres = [b for b in spheres if sphereWanted(b)]

# shift
for b in spheres:
    b.state.pos += (9,9,9)

O.bodies.append(spheres)
###

cheers
Jan

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