Wossys, circle tangent MSN convo:

First you have two circles. No matter what size:

http://vbforums.com/attachment.php?a...id=34753&stc=1


then draw a line between the center points of the circles:


http://vbforums.com/attachment.php?a...id=34754&stc=1


then rotate the line 90 deg.


http://vbforums.com/attachment.php?a...id=34755&stc=1


then scale it using the radius of THAT circle, so it hits the edge of the circle:

http://vbforums.com/attachment.php?a...id=34756&stc=1


then do the same with the other circle, and you have the two points.


Actualy you don't have to even scale it. Just use the rad in THAT direction.



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That works when radius1 == radius2.

But when the circles are different sizes??

http://mathworld.wolfram.com/Circle-CircleTangents.html

That looks workable.

Cheers for the help dude.