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Diablo117

Fri Jun 05, 2009 12:04 am


Moving the screen

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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


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shoobyman

Fri Jun 05, 2009 12:42 am


Re: Moving the screen

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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)


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saltpro15

Fri Jun 05, 2009 8:41 am


RE:Moving the screen

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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.


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Diablo117

Fri Jun 05, 2009 8:00 pm


Re: Moving the screen

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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?


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saltpro15

Fri Jun 05, 2009 8:17 pm


RE:Moving the screen

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


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Diablo117

Fri Jun 05, 2009 10:19 pm


Re: Moving the screen

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


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PrimalDoom

Thu Jun 11, 2009 9:25 pm


Re: Moving the screen

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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.