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# Re: [femm] zoomier

- To: femm@yahoogroups.com
- Subject: Re: [femm] zoomier
- From: Dave Squires <djsquires@plix.com>
- Date: Mon, 14 Apr 2003 10:25:24 -0700
- References: <5.1.1.5.2.20030411082341.047c9e00@email.cind.ornl.gov> <3E9AC56A.9050104@ieee.org> <3E9ADE9C.3040201@plix.com> <3E9AEC38.9070103@ieee.org>
- User-agent: Mozilla/5.0 (Windows; U; Win 9x 4.90; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0

``
`David Meeker wrote:`

> `Dave Squires wrote:`

> >     Dave,
> >     I think you missed the point here (or I did).

> >     Say you want to set a very small air gap
> >     let's say 0.001".
> >     Now you design it with 0.001" resolution
> >     or even smaller. If you try to zoom in
> >     to get a 0.001" grid to fill the screen
> >     with just 4-6 points, you can't do it.

> >     The zoom factor stops long before that.
> >     If you use the window zoom and stretch a
> >     box around a small region it just ignores
> >     it and reorients the screen with no zoom
> >     at all. Where does that limit come from?
> >     It seems that more zoom of the screen drawing
> >     should be possible....or maybe not?
> >     If you have 15 decimal places of exponent
> >     that is a lot of resolution and the screen
> >     should not have much to do with it.

> > `Dave Squires`

> `
> The entire range from -2^15 to +2^15 is "just" 65536 pixels. If, for example, you were running a window 800 pixels wide, the maximum that you could zoom to would be roughly 65536/800, or about 80 times the resolution compared to the view when the full geometry is displayed.`

    I see... So it is tied to pixel count or size instead of simple
    screen coordinate scaling. Hmmm, sounds like it was assumed
    that nobody would want to zoom closer than that. Usually,
    these kinds programming limit assumptions are always proven
    a bad idea at some point. Remember when it was thought that
    nobody would ever use more than 640K of main memory in a PC?
    Or "who needs more than 10meg of disk storage?"

`Dave S.`
``

- References:
  - zoomier
    - From: Boyd Evans <ev3@ornl.gov>
  - Re: [femm] zoomier
    - From: David Meeker <dmeeker@ieee.org>
  - Re: [femm] zoomier
    - From: Dave Squires <djsquires@plix.com>
  - Re: [femm] zoomier
    - From: David Meeker <dmeeker@ieee.org>

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