Function to detect a point in a circle?

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sswift
 #1
Calculate the distance of the point from the center of the circle.

Distance# = Sqr((Px#-Cx#)^2 + (Py#-Cy#)^2)
If Distance# < Radius# Then InCircle()

Radius# is half the width of the circle.

If on the other hand you want to know if two circles collide, then do this:

Calculate distance between circle centers:

Distance# = Sqr((C2x#-C1x#)^2 + (C2y#-C1y#)^2)
If Distance# < (Radius1#+Radius2#) Then Colliding()