Discussion :

[Jagaraujo]

Sorry, but i speak my bad english because i don't know a lot of french .

Well, i am programming a game in pascal language, a simple program. It is a game type "Sonic the Edheghog", in that i need use the scroll but i don't now how i can do it. The game have the following caracters:

- 320x200 pixels of resolution
- 256 colors

Well, if somebody knows how i can do the scroll that he helps me. If he can, that send me a font code, thanks.

A friend of Developpez. Jag

[M.Dlb]

Notre ami espagnol, ca faisait longtemps
No abla español, so I will explain in english...
To scroll the window, you can use the subfunctions 06 and 07 of the interrupt 10h ( See more documentations if you need it ). I don't know if it really works because I've never tried it...
have fun
a+

[haypo]

Which sort of scolling do you want ?
- Vertical scrolling ?
- Horizontal scrolling ?
- Background (picture) scrolling ?

You can use mode 13h to have a 320x200x8 mode :

Code :

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asm
  mov ax,0013h
  int 10h
end;

To come back to text mode (03h : 80x25x4 text mode) :

Code :

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asm
  mov ax,0003h
  int 10h
end;

So, in 13h mode, to put a pixel use : 'Mem[$A000: y*320 +x] := coul;' (coul is a 'Byte'), and to get a pixel use : 'coul := Mem[$A000: y*320 +x];',

Finaly, to do a vertical scrolling (bottom to top) (one step) :

Code :

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move (Mem[$A000: 320], Mem[$A000: 0], (320-1)*200);
Fill (Mem[$A000: 319*320], 0, 320);

Bye,
Haypo

[Jagaraujo]

Ouh! It is very interesant, but i think that it is'nt the thing that i search.

If you know the game SONIC & KNUCKLES and games of this type, you will know how i search the scroll. That the man moves into the screen in a big screen that moves when the man moves him. do you understand? If the man moves, then the screen moves too. Well, the last procedure that you easy to me can be a posibility option, but i think that it isn't the correct.

Well, thanks for all

[charly]

you should use VBe2 that u can dl on the contribution part , Hdd34 do somethings like that with

[haypo]

Try this :
http://pascal.developpez.com/graphisme/Sprite.zip

You want to move the foreground, no ? For this, two solutions :
- One very big image : 320 to 5000 pixel width
- A foreground draw with little image (like 10x10 pixel) : your foreground is a table composed with this littles images. E.g. : if you draw a house (hu hu, nice example), you will have images :
* ##=wall
* []=windows
* ()=door
* ...

Your foreground could be :

Code :

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##########
##()###[]#
##()######

The code to draw this is very simple ! The function that will draw the foreground should have parameters : current (foreground) x ... It's all !

If your x if superior to foreground width, you come back to zero :
x := x mod width;

Bye,
Haypo