Moving the screen

[Diablo117]

What is it you are trying to achieve?
Moving the screen as my character moves in a 2D side scrolling shooter

What is the problem you are having?
It..doesnt move?

Please specify what version of Turing you are using
4.0.5

[shoobyman]

Well, your not going to be moving the screen. Instead, every background object will need to have an x and y location variable, and when u want the illusion of a moving screen, you just move the background scenery by changing the x and y variables (uniformly)

[saltpro15]

I think the proper name for it is blitting. Like shoobyman said, you are going to need x and y position variables and use them to move your background.

[Diablo117]

Alright, so for something like this, I would create "spawn points" for my enemy objects to appear in every once in a while, and they would move to the left as required. When the player is at a certain area(past half-way of the screen) then all the objects move an additional position to the left?

[saltpro15]

that would work yes, as long as you remember to repeat your background so you don't have whitespace

[Diablo117]

Mmm, im thinking of making a tile-based background for easier collision detection but idk.

[PrimalDoom]

The best way I've found to move the screen is to do this

WinY = half of your screen along the Y axis
WinX = half of your screen along the X axis

Y = your players Y coordinate
X = your players X coordinate

WinMoveY = the location all players are moved to on the screen when you move. Your player is also affected by this. WinMoveY is added to the Y coordinate of everything that gets drawn on the screen.

WinMoveX = the location all players are moved to on the screen when you move. Your player is also affected by this. WinMoveX is added to the Y coordinate of everything that gets drawn on the screen.

if WinY - Y ~= 0 then
WinMoveY := - Y + WinY

end if

if WinX - X ~= 0 then
WinMoveX := - X + WinX

end if

or something like that any way i solved it in the game i was making, it's not done yet but it works and i haven't found any flaws with the game in terms of were this piece of code is concerned.