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# Vector plots + "zoomier"

- To: femm mailing list <femm@yahoogroups.com>
- Subject: Vector plots + "zoomier"
- From: David Meeker <dmeeker@ieee.org>
- Date: Fri, 18 Apr 2003 11:39:25 -0400
- User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.3) Gecko/20030312

`I've put up patched versions of femme.exe, femmview.exe, beladraw.exe, and belaview.exe at:`
`http://groups.yahoo.com/group/femm/files/patch.zip`
`These modified versions implement vector plots of the fields (push the new arrow button on the tool bar of femmview or belaview), and they are also modified so that the view can be zoomed in to better than one millionth of the full-scale geometry, rather than only about one eightieth.`
`The vectors are just plotted on the grid points at even spacing--you can make more arrows by changing the grid settings. I'd been thinking about plotting arrowheads on the flux lines or something, but it was a lot easier to just put arrows at evenly spaced grid points. The arrows are scaled by default so that the biggest field corresponds to an arrow that is the same length as the current grid spacing. In the edit box that you get when you press the arrow icon, you can change the relative scaling. The program plots the vectors on an element-by-element basis, so that multiple arrows will get plotted at locations where the field is multi-valued (e.g. interfaces between different materials and corners). There are preference settings for the vector plots so that you can have these plots on or off by default, and so that you can change the color of the arrows.`
`These changes aren't yet incorporated into the release versions available from the website at http://femm.berlios.de -- I'll include these changes to the release versions after I've had a chance get some feedback.`

    Dave.
    --
    David Meeker
    email: dmeeker@ieee.org
    www: http://femm.berlios.de/dmeeker

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