Finding coordinates around a circle when given an angle

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SamPerson12345
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Joined: Sat Aug 30, 2008 5:35 pm

Finding coordinates around a circle when given an angle

Post by SamPerson12345 »

I need to be able to find coordinates around a circle for a game I'm making. All help is greatly appreciated. :3
emonk
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Joined: Tue Aug 12, 2008 11:43 am

Re: Finding coordinates around a circle when given an angle

Post by emonk »

The x,y coordinates of a point on the perimeter of a circle are given by:

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x = radius * math.cos(angle);
y = radius * math.sin(angle);
The math library trig functions take angles expressed as radians, so be aware of conversion if that's not how you express your angles. Look up the math.rad() and math.deg() library functions in the Lua docs.
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