27 lines
1.0 KiB
Plaintext
27 lines
1.0 KiB
Plaintext
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.. _perturb :
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 _place_holder;
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> **_PERTURB_**
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This command moves node coordinates in the following manner.
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Three pairs random numbers between 0 and 1 are obtained. These pairs refer to
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the x, y and z coordinates of the nodes respectively. The first random number
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of each pair is multiplied by the factor given in thecommand. The second
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random number is used to determine if the calculated offset is to be added or
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subtracted from the coordinate. No checking is done to see if elements are
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inverted by this perturbation. _place_holder; It is assumed that the mesh
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is not yet connected.
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 _place_holder; FORMAT:
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**perturb/pset,get,psetnam**e/xfactor,yfactor,zfactor
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 _place_holder; EXAMPLES
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**perturb/**1,0,0/0.5,0,0 _place_holder; _place_holder; add offsets to
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only the xcoordinates of all nodes
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**perturb/pset,get,mypset**/0.001,0.001,0.001 _place_holder; add small offsets to all coordinates of the nodes in the **pset** named **mypset.**
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 _place_holder; [](../new_html/demos/pset/test/html/main_pset.html)
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