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Thread: Rotation by 90 Degree Increments

  1. May 30th, 2006, 02:02 PM #1
    clarkgriswald
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    Exclamation Rotation by 90 Degree Increments

    I need to know how to calculate new x,y coordinates based on 90 degree increments. I have the 180 degree flip, but can't seem to get the 90 degree and 270 degree rotations. Does anyone have a formula? Thanks!
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  2. May 30th, 2006, 02:38 PM #2
    RhinoBull
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    Re: Rotation by 90 Degree Increments

    Not clear what you need to rotate so in case it's some image then try sample below:

    RotatePicture - Rotate a 256-color bitmap by any angle (super-optimized version)
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  3. May 30th, 2006, 02:41 PM #3
    clarkgriswald
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    Re: Rotation by 90 Degree Increments

    Thanks, but what I have is an image with an annotation on it. I need to rotate the annotation (shape) with the image. The image rotation is built in, but i need to redraw the annotation (shape) in the correct postion after the rotation.
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  4. May 30th, 2006, 02:48 PM #4
    RhinoBull
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    Re: Rotation by 90 Degree Increments

    If it's a shape control then you might not be able to but you may re-print text:

    Print Text At Any Angle

    Rotate Fonts
    Microsoft MVP - Visual Basic 2006-2013

    Why VB clears the clipboard on startup and how to avoid it? . Filtering Arrays . Save File To Database . Extract File From Database .
    Extract picture from database without using hard drive . Change Menu BackColor . How to use MS Flexgrid . Make Frame Transparent .
    The Easiest Way to Create an NT Service With VB6 . How to comment blocks of code in VB5 and VB6 . How to find and replace missing members of control array
    Visual Basic 6.0 On-Line Documentation . Connection Strings
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