Scrolling Issue

[johnnyrocks]

What is it you are trying to achieve?
I'm trying to achieve vertical scrolling, I've looked up a few tutorials online and I tried to understand it in the best of my abilities, but I seem to get stumped here.


What is the problem you are having?
I'm trying to generate random pictures, and then have them fall down, with the vertical scrolling so that after I can have my character jump on the platform, while having a score. Any pointers are nice, thanks!


Describe what you have tried to solve this problem
I first used randint to randomly position the pictures everywhere, then I realized by doing that, it'll just disappear and it will probably go down, but keep on randomly generating. I tried to also create the for loop first then have it drop, but that didn't work either. I'm pretty stumped on this.


Post any relevant code (You may choose to attach the file instead of posting the code if it is too long)

Turing:

setscreen ("graphics:800,600,nobuttonbar") var plat := Pic.FileNew ("platform.bmp") var platnum : int := 50 var scrollSpeed := 1 var GROUND_HEIGHT := 120 var platx, platy : int %------------------SCROLLING----------------- proc scroll     GROUND_HEIGHT -= scrollSpeed     % Pic.Draw (plat, platformx, platformy, picCopy)     drawline (0, GROUND_HEIGHT, maxx, GROUND_HEIGHT, black) end scroll proc generate     for i : 1 .. platnum         randint (platx, 100, 760)         randint (platy, 100, 760)         Pic.Draw (plat, platx, platy, picMerge)         platy -= scrollSpeed     end for end generate setscreen ("offscreenonly") loop     scroll     generate     View.Update     delay (20)     cls end loop

Please specify what version of Turing you are using
4.0.5

[Insectoid]

You need to have X and Y coordinates for every single object on the screen. You then want to have an offset, which is just an integer. When you draw your objects, use the coordinates (x, y-offset). To move objects down, simple increase the offset.

[johnnyrocks]

Insectoid @ Sun Jun 16, 2013 2:15 pm wrote:

You need to have X and Y coordinates for every single object on the screen. You then want to have an offset, which is just an integer. When you draw your objects, use the coordinates (x, y-offset). To move objects down, simple increase the offset.

So if I were to randomly generate the x and y position, I would have to find those x & Y positions I generated?

[johnnyrocks]

Turing:

setscreen ("graphics:800,600,nobuttonbar") var plat := Pic.FileNew ("platform.bmp") var scrollSpeed := 1 var GROUND_HEIGHT := 120 var platx, platy : array 1 .. 50 of int %------------------SCROLLING----------------- proc scroll     GROUND_HEIGHT -= scrollSpeed     drawline (0, GROUND_HEIGHT, maxx, GROUND_HEIGHT, black) end scroll setscreen ("offscreenonly") loop     for i : 1 .. 50         randint (platx (i), 120, 700)         randint (platy (i), 120, 700)     end for     loop         scroll         for i : 1 .. 50             Pic.Draw (plat, platx (i), platy (i), picMerge)             platy (i) -= scrollSpeed         end for         View.Update         delay (20)         cls     end loop end loop

Okay I got it to work! Thank you!!