Checking the location of a moving object

[Mark Schonewille]

David,

I don't understand what you want, but you could always define a path  
instead of two points. Check all points on the path to see whether  
they are within the boundaries. If a point isn't within the  
boundaries, update it. Once you have a correct path, execute the move  
command. You might want to read more about the move command in the  
dictionary.

--
Best regards,

Mark Schonewille

Economy-x-Talk Consulting and Software Engineering
Homepage: http://economy-x-talk.com
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On 19 jul 2010, at 13:13, David Glasgow wrote:

> Hello folks.
>
> I am proposing to import data which will form a 'freehand' graphic  
> containing about 5,000 data point loc pairs.  I have made a marker  
> to follow the curve using the move command, which works fine.   
> However, I want the user to be able to select a threshold on the Y  
> axis above and below which graphics change on screen.
>
> I therefore need to check the vertical position of the marker, so I  
> did this:
>
> In the starting button:
>
> on mouseUp
>   checkit
>   move grc "marker" to the points of graphic "PPG" in 90 seconds
> end mouseUp
>
> and in the card script:
>
> on checkit
>   put the loc of grc "marker" & "moving  " & the movingcontrols
> -- check threshold here
>   if the movingcontrols is not empty then send checkit to me in 1 tick
> end checkit
>
>
> I get the first loc for grc "marker" reported in the message box,  
> but that's it.  Is a move completely blocking or am I doing  
> something wrong?
>
> If I can't use move in this way, any suggestions?
>
> Thanks
>
> David Glasgow