complete rotation

[jscorpion]

I am graphing data points on a x an y graph. As the angle changes I take a reading of another device. I take as many readings as possible within a 360 degree rotation. How can I in vb code tell when I have made one rotation. You can not use > or < than since I am comparing radians. Is there some sample code someone could post to show me a probably obvious solution.

Thank You!

jscorpion

 

[jscorpion]

sorry, I am comparing degrees not radians. My mistake

 

[johnwm]

Do until degrees > 360
..
..
Loop Let me know if this helps
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[jscorpion]

degrees never gets > than 360 it returns back to 0 which is causing the delima. I am reading an external device which is giving me the information in degrees, once a complete circle is done it returns back to zero. This is why > and < than comparisons are not working.

Thank you for your response.

 

[johnwm]

If it's always going in the same direction then degrees will increase to 359 then go back to 0

If my understanding is correct then

Dim nearlydone as Boolean
Dim done as Boolean
Done = False
Nearlydone = False
Do until Done
...
...

If degrees > 300 then
nearlydone = true
end if
If nearlydone=true and degrees < 1 then
nearlydone = false
done = true
loop

This should take you round once Let me know if this helps
________________________________________________________________
If you are worried about how to post, please check out FAQ222-2244 first

'There are 10 kinds of people in the world: those who understand binary, and those who don't.'

 

[jscorpion]

Yes, I had thought of doing it that way, but I did not know if there was a better way to compare degrees in vb. I guess that is the route I will go. Thank you for your help.

jscorpion

 

[CajunCenturion]

I think there may be simpler approach. Since your moving in a clockwise direction - degrees should always be increasing, except at the completion of a rotation, then whenever the current value is less than the previous value, you would have completed a rotation.

if (current_degree < previous_degree) then
Rotation Complete
End If
previous_degree = current_degree Good Luck
--------------
As a circle of light increases so does the circumference of darkness around it. - Albert Einstein

 

[jscorpion]

Thank you CajunCenturion for your response. That does seem to be a better way with less code. One of my orginal problems was that I may not be starting at zero everytime which would mess that formula up, but I have decided to code it to subtract the value back to start at zero so this should work great. Thank you again!

jscorpion