Monkey-X - Dungeon/Cave Generator Rectangles - code example

Import mojo

Class tilemap    
    Field tilew:Int
    Field tileh:Int
    Field width:Int
    Field height:Int
    Field map:Int[][]
    Method New(width:Int,height:Int,tilew:Int,tileh:Int)
        Self.width=width
        Self.height=height
        Self.tilew=tilew
        Self.tileh=tileh
        map = New Int[width][]
        For Local i=0 Until width
            map[i] = New Int[height]
        Next
        makemap
        settiles
    End Method
    ' Here we create the walls
    Method settiles()
        'create walls
        For Local y=1 Until height-1
        For Local x=1 Until width-1
            Local t:Int=map[x][y]
            If t=0 And map[x+1][y] = 1 Then map[x][y] = 2
            If t=0 And map[x][y+1] = 1 Then map[x][y] = 2
            If t=0 And map[x-1][y] = 1 Then map[x][y] = 2
            If t=0 And map[x][y-1] = 1 Then map[x][y] = 2
        Next
        Next
        ' get corners
        For Local y=1 Until height-1
        For Local x=1 Until width-1
            Local t:Int=map[x][y]
            If t=0 And map[x+1][y] = 2 And map[x][y+1] = 2 Then map[x][y] = 3
            If t=0 And map[x-1][y] = 2 And map[x][y+1] = 2 Then map[x][y] = 3
            If t=0 And map[x][y-1] = 2 And map[x+1][y] = 2 Then map[x][y] = 3
            If t=0 And map[x-1][y] = 2 And map[x][y-1] = 2 Then map[x][y] = 3
        Next
        Next
        'set corners to value 2
        For Local y=1 Until height-1
        For Local x=1 Until width-1
            If map[x][y] = 3 Then map[x][y] = 2
        Next
        Next
    End Method
    Method makemap()
        'here we make random rectangles and see if they 
        'are placed next to another rectangle.
        'This will grow a random level...
        Local w1:Int=Rnd(1,4)
        Local h1:Int=Rnd(1,4)
        Local x1:Int=width/2
        Local y1:Int=height/2
        
        drawmaprect(x1,y1,w1,h1)
    
    
        Local maxrooms:Int=(width*height)/30
        Local numrooms:Int=0
        Local cnt:Int=0
        While numrooms < maxrooms And cnt<15000
            cnt+=1
            Local done:Bool=False
            w1=Rnd(1,4)
            h1=Rnd(1,4)
            x1=Rnd(3,width-5)
            y1=Rnd(3,height-5)
            'check right
            If map[x1][y1] = 1 And map[x1+1][y1] = 0 And map[x1+1][y1-2] = 0 And map[x1+1][y1+2] = 0 
                drawmaprect(x1,y1,w1,h1)
                numrooms+=1
                done=True
            End If
            'check bottom
            If done=False And map[x1][y1] = 1 And map[x1][y1+1] = 0 And map[x1-2][y1+1] = 0 And map[x1+2][y1+1] = 0
                drawmaprect(x1,y1,w1,h1)
                numrooms+=1
                done=True
            End If
            'check top
            If done=False And y1+h1<height-1
                If map[x1][y1+h1+1] = 1 And map[x1][y1+h1] = 0 And map[x1-2][y1+h1] = 0  And map[x1+2][y1+h1] = 0
                    drawmaprect(x1,y1,w1,h1)
                    numrooms+=1
                    done=True
                End If
            End If
            'check left
            If done=False And x1+w1<width-1
                If map[x1+w1+1][y1] = 1 And map[x1+w1][y1] = 0 And map[x1+w1][y1-2] = 0 And map[x1+w1][y1+2] = 0
                    drawmaprect(x1,y1,w1,h1)
                    numrooms+=1                    
                End If
            End If
        Wend

    End Method
    Method drawmaprect(x:Int,y:Int,w:Int,h:Int)
        For Local y1=y To y+h
        For Local x1=x To x+w
            If x1>-1 And y1>-1 And x1<width And y1<height
                map[x1][y1] = 1
            End If
        Next
        Next
    End Method
    Method draw()
        SetColor 255,255,255
        For Local y=0 Until height
        For Local x=0 Until width
            Local t:Int=map[x][y]
            Select t
                Case 1 'wall
                SetColor 100,100,100
                DrawRect x*tilew,y*tileh,tilew,tileh
                Case 2 'wall
                SetColor 200,200,200
                DrawRect x*tilew,y*tileh,tilew,tileh                
            End Select            
        Next
        Next
    End Method
End Class

Global m:tilemap

Class MyGame Extends App

    Method OnCreate()
        Seed = GetDate[5]
        SetUpdateRate(60)
        createrandommap()
    End Method
    Method OnUpdate()  
        If KeyHit(KEY_SPACE) Or MouseHit(MOUSE_LEFT)
            createrandommap()
        End If      
    End Method
    Method OnRender()
        Cls 0,0,0 
        m.draw
        SetColor 255,255,255
        DrawText "Press Space or Tab to create new level",0,0
    End Method
End Class

Function createrandommap()
    Local r:Int=Rnd(0,3)
    Local w:Int,h:Int,tw:Int,th:Int
    Select r
    Case 0 
        w=20;h=15;tw=32;th=32
    Case 1 
        w=20*2;h=15*2;tw=16;th=16
    Case 2 
        w=20*4;h=15*4;tw=8;th=8
    End Select
    m = New tilemap(w,h,tw,th)
End Function

Function Main()
    New MyGame()
End Function