From: Sean H. Breheny <shb7@CORNELL.EDU>
Subject: Re: [OT]: MATLAB graphics


>> >I want to display a BMP file in MATLAB and then be able to
>>>draw lines and pixels on top of it and have them change quickly

>>Have you considered Java/Java3d/Javascript in DHTML or
>>VRML?

>No, I hadn't. Can you please give me more information?

Have you used "Winamp" the windows mp3 player? It has thousands of 'skins'
that change its appearance. Was that the issue - making a radar overlay on
various a maps?

Many (active-x) controls (or the Sun equivalent) can use a gif for a
background. The control can be hosted by a DHTML document with the
graphic/map, and the controls glued together with VB or Javascript.

DHTML is dynamic HTML - the expansion Micro$oft keeps making to HTML. I
called scripting a 'virus support feature' before I really understood its
capability - the ability to write a GUI program at a high-level, marshall
diverse data types and that is cross-platform, somewhat like Tcl.

The latest Micro$oft DHTML SDK (with help and example files) is available
for download at the Evil Empire's website, and tutorials are all over the
net if you do a search.

>Any links to where I can find out how to display graphics and receive data
>from the serial port using one of the tools you mention?

I know there are controls to do that, but I haven't used them. For your
purpose, you might get data with the serial IO control, write a control that
hosts MATLAB or other code library (perhaps checkout MMX DSP libraries) and
let the DHTML document with the map background graphic host them. But if it
can be done it DHTML, tools may be better in VB or C or Java.

>How easy is it (using what you suggest) to talk to the serial port,
read/write to a file on the hard
>drive, have events that happen at definite time intervals?

All can be done in DHTML or VB. There are usenet groups with experts on
those issues. Probably the easiest language to program in is the one you
know and have the best tools for. I was thinking if you program in MATLAB,
does the user need to buy a MATLAB engine? Do you have to pay royalties?

Scott

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