Monkey-X - Circle Packing - Code Example

Import mojo

Class circle
    Field x:Int,y:Int
    Field radius:Int
    Method New()
        radius = 2
        Local exitloop:Bool=False
        While exitloop = False
            exitloop=True
            Self.x = Rnd(DeviceWidth)
            Self.y = Rnd(DeviceHeight)
            For Local i:=Eachin mycircle
                If i.x = x And i.y = y Then
                    Else
                    If circleoverlap(    i.x,i.y,i.radius,
                                        x,y,2) = True Then
                        exitloop=False
                    End If
                End If
            Next
        Wend
    End Method
    Method grow()
        If x-radius<0 Then Return
        If x+radius>DeviceWidth Then Return
        If y-radius<0 Then Return
        If y+radius>DeviceHeight Then Return
        For Local i:=Eachin mycircle
            If i.x=x And i.y=y Then
            Else
                If circleoverlap(    x,y,radius,
                                    i.x,i.y,i.radius)
                    Return
                End If 
            End If
        Next
        radius+=1
    End Method
    Method draw()
        SetColor 255,255,255
        DrawCircle x,y,radius
        SetColor 0,0,0
        DrawCircle x,y,radius-2
    End Method
    Function circleoverlap:Bool(x1:Int,y1:Int,r1:Int,x2:Int,y2:Int,r2:Int)
        Local dx:Int = x1-x2
        Local dy:Int = y1-y2
        Local r:Int = r1+r2
        If dx*dx+dy*dy <= r*r Then Return True Else Return False
    End Function    
End Class

Global mycircle:List<circle> = New List<circle>

Class MyGame Extends App
    Field counter:Int
    Method OnCreate()
        SetUpdateRate(5)
        mycircle.AddLast(New circle())
    End Method
    Method OnUpdate()   
        If counter>100 Then Return
        For Local i=0 Until 5
            mycircle.AddLast(New circle())
        Next
        For Local i:=Eachin mycircle
            i.grow
        Next
        counter+=1
    End Method
    Method OnRender()
        Cls 0,0,0 
        SetColor 255,255,255
        For Local i:=Eachin mycircle
            i.draw
        Next
    End Method
End Class


Function Main()
    New MyGame()
End Function