Monkey-X - Grey Rnd Poly grid backgrounds - code example

Import mojo

Class gridbackground
    Field mapwidth:Int
    Field mapheight:Int
    Field tilewidth:Float
    Field tileheight:Float
    Field mapdepth:Int
    Field mapx:Float[][]
    Field mapy:Float[][]
    Method New(mapwidth:Int,mapheight:Int)
        Self.mapwidth = mapwidth
        Self.mapheight = mapheight
        tilewidth = DeviceWidth()/Float(mapwidth)
        tileheight = DeviceHeight()/Float(mapheight)
        mapx = New Float[mapwidth][]
        mapy = New Float[mapwidth][]
        For Local i = 0 Until mapwidth
            mapx[i] = New Float[mapheight]
            mapy[i] = New float[mapheight]
        Next 
        makegrid    
    End Method
    Method makegrid()
        For Local y=0 Until mapheight
        For Local x=0 Until mapwidth
            mapx[x][y] = x*tilewidth + Rnd(-tilewidth/3,tilewidth/3)
            mapy[x][y] = y*tileheight + Rnd(-tileheight/3,tileheight/3)
        Next
        Next
    End Method
    Method draw()
        For Local y=0 Until mapheight-1
        For Local x=0 Until mapwidth-1
            Local pol:Float[8]
            pol[0] = mapx[x][y]
            pol[1] = mapy[x][y]
            pol[2] = mapx[x+1][y]
            pol[3] = mapy[x+1][y]
            pol[4] = mapx[x+1][y+1]
            pol[5] = mapy[x+1][y+1]
            pol[6] = mapx[x][y+1]
            pol[7] = mapy[x][y+1]
            Local a:Int=Rnd(0,256)
            SetColor a,a,a
            DrawPoly pol
        Next
        Next    
    End Method
End Class

Global mygbg:gridbackground

Class MyGame Extends App
    
    Method OnCreate()
        SetUpdateRate(1)
        mygbg = New gridbackground(25,25)
    End Method
    Method OnUpdate() 
        mygbg = New gridbackground(Rnd(10,30),Rnd(10,30))       
    End Method
    Method OnRender()
        Cls 0,0,0 
        SetColor 255,255,255
        mygbg.draw
    End Method
End Class


Function Main()
    New MyGame()
End Function