Actually I already did this. If we are talking about the same
thing then I have a stack that does this. I can send it to
you. It simply returns the rgb value of the pixel beneath the
cursor, I can dig it up and send it off to those interested. I
would place it up on mctools but we are having a browser problem
trying to upload files using the packaged process which came
with PHP. Oh well.
On Tuesday, June 26, 2001, at 10:08 PM, Scott Raney wrote:
> On Tue, 26 Jun 2001 Rodney Tamblyn <[EMAIL PROTECTED]>:
>
>> It is possible use the mouseColor function to get the colour
>> underneath the cursor. Does anyone here know if there is a way to
>> get the colour at an arbitrary point?
>> I have some medical images which have a (normally hidden) "rollover"
>> layer where features are identified by irregular shaped solid
>> colours. When the user drags the mouse over the image I want to be
>> able to determine the colour at the same point in this hidden layer.
>> Depending on the colour the user is over, appropriate rollover
>> comments can be shown. It's possible to do this in Director but I
>> haven't yet worked out how to do it in MC.
>
> Sounds like what you want is more than just the color at "an arbitrary
> point", it's at "an abitrary point in an object that isn't even drawn
> on the screen". This is not even theoretically possible to do in
> general (I doubt even Director can do it for all cases), but as long
> as that hidden layer is an image or can turned into an image (e.g.,
> show it at some point and then "import snapshot"), you can do this in
> MetaCard in 2.4 using the new imageData property. You just need to
> calculate the offset of the pixel in the buffer and then get it and
> convert it to some usable value (like an R,G,B value).
> Regards,
> Scott
>
>> --
>> --
>> Rodney Tamblyn
>> Educational Media group
>> Higher Education Development Centre, 75 Union Place
>> University of Otago, PO Box 56, Dunedin, New Zealand
>> ph +64 3 479 7580 Fax +64 3 479 8362
>> http://hedc.otago.ac.nz ~ http://rodney.weblogs.com
>
> ********************************************************
> Scott Raney [EMAIL PROTECTED] http://www.metacard.com
> MetaCard: You know, there's an easier way to do that...
>
>
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