PureBASIC and scrolling

[Rings]

splitted

[Olliv]

Thank you Rings!

[Olliv]

@Olliv: Here is a small adjustment needed for the example posted for large view screens. I present it merely to keep your example working and hopefully it is not considered an irritant.

It is presented in two parts to avoid posting all the intervening code

Code: Select all

Wi = 32
He = 32
OpenScreen(Dw, Dh, Dd, "")
;Add the following lines to test if screen is larger vertically than needed and set maxheight 'Dh2' appropriately
If Dh > ((He - 1) * 32)
  Dh2 = ((He - 1) * 32)
Else
  Dh2 = Dh
EndIf 

This portion modifies only the line at the start of the inner display loop with YS3 (changing 'Dh' to 'Dh2').

Code: Select all

For XS3 = 0 - 32 To Dw - 1 Step 32
      For YS3 = 0 To Dh2 - 1 Step 32 ; <== use maxheight based on screen and map size
        ;Debug Str(XS3 / 32 + OffsetTileX) + "; " + Str(YS3 / 32)
        XX = XS3 / 32 + OffsetTileX
        If XX => 0
          Tile = Tile(XX, YS3 / 32)
          If Tile
            DisplaySprite3D(Tile, XS3 + OffsetX, YS3)
          EndIf
        EndIf
      Next
    Next

The difference is shown in two thumbnails, the left one is before the change.

@Demivec

Well... Excuse me if come back again to you, but I understand nothing about your last observation.

I have two questions I hope you have time to answer:

1) What are the conditions of your last observation?
> Only for unidirectionnal scrolling (just vertical or just horizontal)? Or for multi-directionnal scrolling?

2) Is the left picture really what you see on your computer? Or is it a representative (symbolic) picture which announces a possible bug depending the specific dimensions on different computers?

Thank you.

Ollivier

[Demivec]

@Demivec

Well... Excuse me if come back again to you, but I understand nothing about your last observation.

I have two questions I hope you have time to answer:

1) What are the conditions of your last observation?
> Only for unidirectionnal scrolling (just vertical or just horizontal)? Or for multi-directionnal scrolling?

2) Is the left picture really what you see on your computer? Or is it a representative (symbolic) picture which announces a possible bug depending the specific dimensions on different computers?

1: It is for your horizontal scrolling example only. The simple fix I posted could be improved further by possibly centering the map vertically on the visible screen.
2: Yes. I have a larger screen view than you did and thus I see the map repeating (with an offset column) to fill the larger screen view. The same would happen if the map being used had been narrower than the screen.