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[Kneib François <1273172@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Hi,

I noticed that there is a limited number of bodies you can add to
clump::members : 256. Whatever method you use, if you put 257 members
into a clump, the c++ map "members" will have the right number of keys
(257), but all corresponding values of Se3r will be set to "nan". If you
create a clump of 256 bodies, it will be ok first, but if you add one
more body all clump members will be corrupted (see the script attached).

I think the problem doesn't come from the "map" type of C++ or the
"dict" type of python, because they always have the right size, even if
the clump size exceeds 256. It looks like a variable doesn't have
sufficient memory allocated and I really wonder where ...

Does someone have an idea ?

Thanks

** Affects: yade
     Importance: High
         Status: New


** Tags: clump size

** Attachment added: "big_clump.py"
   https://bugs.launchpad.net/bugs/1273172/+attachment/3958811/+files/big_clump.py

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https://bugs.launchpad.net/bugs/1273172

Title:
  Clump size limited to 256 bodies.

Status in Yet Another Dynamic Engine:
  New

Bug description:
  Hi,

  I noticed that there is a limited number of bodies you can add to
  clump::members : 256. Whatever method you use, if you put 257 members
  into a clump, the c++ map "members" will have the right number of keys
  (257), but all corresponding values of Se3r will be set to "nan". If
  you create a clump of 256 bodies, it will be ok first, but if you add
  one more body all clump members will be corrupted (see the script
  attached).

  I think the problem doesn't come from the "map" type of C++ or the
  "dict" type of python, because they always have the right size, even
  if the clump size exceeds 256. It looks like a variable doesn't have
  sufficient memory allocated and I really wonder where ...

  Does someone have an idea ?

  Thanks

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