drawCircle

drawCircle=function(xCenter,yCenter,radius,color,width)
    local coords={}
    local r2=radius*radius
    local x,y
    for x = -radius, radius do
        y=math.sqrt(r2-x*x)+.5
        coords[x+radius+1]={xCenter+x,yCenter+y}
        coords[radius*3-x+2]={xCenter+x,yCenter-y}
    end
    console.canvasDrawPoly(coords,color,width)
end