Hi,
I'm trying to create my first game, of course a Pong clone. ;-)
It's OOP, and I have a problem with my vars here.
AutoMidHandle(True)
Graphics 640,480
HideMouse()
Global GameObjectList:TList = CreateList()
Type TGameObject
Field X:Int = 0
Field Y:Int = 0
Field Image:TImage
Method DrawSelf()
DrawImage Image, X, y
End Method
Method UpdateState() Abstract
End Type
Type TBall Extends TGameObject
Field OrigSpeed:Int = 3
Field SpeedX:Int = OrigSpeed
Field SpeedY:Int = OrigSpeed
Function Create:TBall(Filename:String, xstart:Int = 320, ystart:Int = 240)
Local Ball:TBall = New TBall
Ball.X = xstart
Ball.Y = ystart
Ball.Image = LoadImage(filename)
Ball.SpeedX = Rand(-OrigSpeed, OrigSpeed)
Ball.SpeedY = Rand(1, OrigSpeed)
ListAddLast GameObjectList, Ball
Return Ball
End Function
Method UpdateState()
DrawText (X, 0, 0)
DrawText (Y, 0, 20)
DrawText (SpeedX, 0, 30)
DrawText (SpeedY, 0, 40)
X:+SpeedX
Y:+SpeedY
If X > 640
SpeedX = -OrigSpeed
End If
If X < 0
SpeedX = OrigSpeed
End If
If Y > 480
SpeedY = -OrigSpeed
End If
If Y < 0
SpeedY = OrigSpeed
End If
End Method
End Type
Ball:TBall = TBall.Create("ball.png")
Repeat
Cls
For o:TGameObject = EachIn GameObjectList
o.DrawSelf()
o.UpdateState()
Next
Flip
Until KeyDown(KEY_ESCAPE) Or AppTerminate()
That's the code for my ball class, missing the player classes (which works). The ball is set, but whatever I try, it always stays in the center of the screen. I thought, with setting the speed vars within my Create function they would move. But they don't.
Can anyone tell me, why this happens?
Thanx,
Oliver
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