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[Bug 1273172] Re: Clump size limited to 256 bodies.

 

I would like to add one more precision :
Into the script I have sent, all spheres are aligned and if I put more than 256 spheres into the clump it will not work (with NaN). But if you replace (l. 37)

utils.sphere((i,0,0),0.5

by :

utils.sphere((i,rand(),rand()),0.5

then you have one chance out of two not to get the bug.

And if you put seed(x) somewhere at the top of the script (replacing x
by whatever int you want), then it will always bugs, or always works
depending on the int you choose.

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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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