CB Repository

SCREEN 1024,768
 
'Taulukko, joka sisältää maaston korkeuden ruudun alalaidasta kohdassa x
Dim contour(ScreenWidth())
 
'Kuva johon maasto piirretään
Global gMap
 
generateContour()   'Luodaan maaston muodot
createForeground()  'Piirretään maasto kuvaan
 
//PÄÄSILMUKKA...
Repeat
    DrawImage gMap,0,0
    DrawScreen
Forever
//...
 
 
//////////////////
//** FUNKTIOT **//
//////////////////
 
//Luo maaston muodon ja tallentaa sen countour-taulukkoon
Function generateContour()
    Dim rand1 As Float, rand2 As Float, rand3 As Float, rand4 As Float
    Dim offset As Float, peakheight As Float, flatness As Float, height As Float
    
    rand1 = Rnd(1) + 1
    rand2 = Rnd(1) + 2
    rand3 = Rnd(1) + 3
    
    offset = ScreenHeight() / 2
    peakheight = ScreenHeight() / 4
    flatness = ScreenWidth() / 8
    
    For x = 0 To ScreenWidth()
        height = peakheight / rand1 * Sin((Float(x) / flatness * rand1 + rand1)  * (180 / PI))
        height = height + peakheight / rand2 * Sin((Float(x) / flatness * rand2 + rand2)  * (180 / PI))
        height = height + peakheight / rand3 * Sin((Float(x) / flatness * rand3 + rand3)  * (180 / PI))
 
        height = height + offset
        
        contour(x) = Int(height)
    Next x
    
EndFunction
 
//Piirtää maaston muodot maastokuvaan
Function createForeground()
    gMap = MakeImage(ScreenWidth(),ScreenHeight())
    
    DrawToImage gMap
        For x = 0 To ScreenWidth()
            Line x,contour(x),x,ScreenHeight()
        Next x
    DrawToScreen
EndFunction