Rotating arrow

Discussion in 'Code Samples & Tips' started by Erel, May 11, 2007.

  1. Erel

    Erel Administrator Staff Member Licensed User

    This is an example of using the form's ForeLayer property with the Polygon method to create a rotating arrow.
    The position of each coordinate is calculated using this formula:
    New X = X * Cos(degree) - Y * Sin(degree)
    New Y = Y * Cos (degree) + X * Sin(degree)

    As we are using the forelayer there is no need to redraw the background.
     

    Attached Files:

  2. derez

    derez Expert Licensed User

    letter - number

    Hi Erel
    Thank you for this example - it was helpful for me.
    Took me a while to understand why when I type the code I get an error, and if I copy it from youe example - it runs.
    The problem is that "l" and "1" in the program look very similar (the name of the array is alX)
    see photo.
    David
     

    Attached Files:

    • alx.JPG
      alx.JPG
      File size:
      10.6 KB
      Views:
      117
  3. Erel

    Erel Administrator Staff Member Licensed User

    I see your point.
    Next time it will be named list1 as it is more clear.
     
Loading...
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice