Draw Lines Over a Circle

Posted by VOX on Stack Overflow See other posts from Stack Overflow or by VOX
Published on 2010-06-18T09:47:14Z Indexed on 2010/06/18 9:53 UTC
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c#

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math

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vector

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geometry

There's a line A-B and C at the center between A and B. It forms a circle as in the figure. If we assume A-B line as a diameter of the circle and then C is it's center. My problem is I have no idea how to draw another three lines (in blue) each 45 degree away from AC or AB. No, this is not a homework, it's part of my complex geometry in a rendering.

http://www.freeimagehosting.net/image.php?befcd84d8c.png

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