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# Re: [femm] LUA question on current density

- To: femm@yahoogroups.com
- Subject: Re: [femm] LUA question on current density
- From: Keith Gregory <k.gregory@lboro.ac.uk>
- Date: Fri, 24 Aug 2001 15:51:19 +0100
- In-reply-to: <3B865AE8.833CA72A@foster-miller.com>
- References: <4.3.2.7.2.20010824075302.00aabc10@staff-mailin.lboro.ac.uk>

`Dave,`
`Just downloaded your mods, as usual just what was needed.`
`And thanks for the mention - I'm not sure I've done anything to deserve that!`
`Jim,`
`To modify current density just download the new version and use modify_material!`
`Keith.`
`At 09:47 24/08/01 -0400, you wrote:`

> `Keith Gregory wrote:`

>     > Jim,
>     >
>     > I think you may have to delete the material using
>     >
>     > delete_material("copper", ...
>     >
>     > and then put it back with a different current density using
>     >
>     > add_material("copper", .....
>     >
>     > I've never tried this but it works with circuits.
>     >
>     > Keith.

>     I've incorporated Robin's latest fixes, and added some of my own new new lua
>     functions, and uploaded it to the files section:
>     http://groups.yahoo.com/group/femm/files/setup.exe for the self-installing
>     executables
>     http://groups.yahoo.com/group/femm/files/femmsrc.zip for the source code
>     One of the things that this version has is the ability to modify properties,
>     rather than having to delete them and then totally rebuild them. I've also
>     updated the documentation, so these functions are described in section 5.2.9
>     (modify_material, modify_bound_prop, modify_point_prop, modify_circ_prop).

>     Other modifications:
>     Since it was really easy to do, I made it so that all lua functions can use
>     either the function naming convention with the underscores or the one without
>     it (e.g. modifymaterial and modify_material can be used interchangeably);
>     I added the "reset colors" button to the preferences (thanks to Alexander
>     Eigner for the suggestion);
>     Fixed two obscure bugs with the flux smoothing algorithm that I ran across;
>     Modified the lua preprocessor command analyse() so that it can take a
>     parameter that tells it to run in minimized mode. I also created the
>     alternative function name analyze() for those of us in the USA who can't spell
>     right...
>     Added the routies add_bh_point and clear_bh_points so that nonlinear materials
>     can be defined from scratch in a lua script (before, there was no way to
>     programatically build a bh curve);
>     I've also (hopefully) finished revising the manual to reflect all of the femm
>     3.1 and lua functionality.

> `Dave.`
> ``
> ``
> `Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/`

    Keith Gregory
    Department of Electronic & Electrical Engineering
    Loughborough University
    Phone: 01509 227025 Fax: 01509 227014
    Department web: http://www.lboro.ac.uk/departments/el/

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- References:
  - Re: [femm] LUA question on current density
    - From: Keith Gregory <k.gregory@lboro.ac.uk>
  - Re: [femm] LUA question on current density
    - From: David Meeker <dmeeker@foster-miller.com>

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