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strange error in simple labview program


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Hallo, I want to make a labview program that can store the coordinations / route of the mouse, but only went the mouse is in a xy-plot area. But now I have run into a strange error. (I have attached my labview program so that you can see for your self). When the horizantal coordination are lower then the coordinations of the the xy graph the calculated new mouse horizontal coordination is rised by 4294967296. There are two funny things: this number is 2 times the max of an I32 and if I replace the xy-graph coordinations by an constant there is no error.

Does anybody know what this error is about.

thanks,

Andries

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QUOTE(Rimmergogo @ Mar 1 2007, 01:27 PM)

Hallo, I want to make a labview program that can store the coordinations / route of the mouse, but only went the mouse is in a xy-plot area. But now I have run into a strange error. (I have attached my labview program so that you can see for your self). When the horizantal coordination are lower then the coordinations of the the xy graph the calculated new mouse horizontal coordination is rised by 4294967296. There are two funny things: this number is 2 times the max of an I32 and if I replace the xy-graph coordinations by an constant there is no error.

Does anybody know what this error is about.

thanks,

Andries

I fixed the problem already by substracting 4294967296 from the horizontal value wen it is above 2000. but still the bug remains unclarified.

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QUOTE(Rimmergogo @ Mar 1 2007, 01:44 PM)

I fixed the problem already by substracting 4294967296 from the horizontal value wen it is above 2000. but still the bug remains unclarified.

Since the value you get from 'Y Scale.Bounds:Width' is unsigned, the output type of following addition and the top subtract operation (Horizontal) will be unsigned.

Changing the output type from the addition to signed long (with a 'To Long Integer' conversion) solves the problem.

-Mikkel :)

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QUOTE(Mikkel @ Mar 1 2007, 03:02 PM)

Since the value you get from 'Y Scale.Bounds:Width' is unsigned, the output type of following addition and the top subtract operation (Horizontal) will be unsigned.

Changing the output type from the addition to signed long (with a 'To Long Integer' conversion) solves the problem.

-Mikkel :)

Now I see the problem.... thanks a lot. This part works fine now and now I can continue :arrow: .

Andries

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QUOTE(Rimmergogo @ Mar 5 2007, 09:48 AM)

I want a LabVIEW icon under my name!

Shit not yet. heheheh

May I suggest, that you try participate in a constructive manner in stead of replying to your own posts? :thumbdown:

This is - by far - the easiest way to get an icon under your name.

-Mikkel :)

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