OpenEuphoria

Re: HELP, Beginner trying to make a simple game

• Posted by Lucius L Hilley III <luciuslhilleyiii at JUNO.COM> Jul 05, 1997
• 1175 views

On Fri, 4 Jul 1997 20:32:24 +0200 Piotr Dubla <pman at IAFRICA.COM> writes:
>---------------------- Information from the mail header
>-----------------------
>Sender:       Euphoria Programming for MS-DOS
><EUPHORIA at MIAMIU.ACS.MUOHIO.EDU>
>Poster:       Piotr Dubla <pman at IAFRICA.COM>
>Subject:      HELP, Beginner trying to make a simple game
>-------------------------------------------------------------------------------
>
>I have a 4 bitmaps of a man facing left right up down they are called
>front
>123 (animation frames) left 123 and so on. I would like to make him
>move on
>a bitmap background without erasing the background. Please help me.
>
>A Beginner

Simple
There are several ways I will explain the easiest first.

FIRST WAY
1. If you are using a mode that has multiple screen pages
   you can flip between two of them. THIS is to prevent
   flicker.
2. bckgrnd = the background bitmap
3. image = image to be moving
4. display bckgrnd to screen
   Hopefully you can display it to a page that is not
   the present viewing page
5. display image onto same page or screen
6. if you have 2 or more pages now flip that page viewable
7. repeat processes 4, 5, & 6

SECOND WAY
1. bckgrnd = the background bitmap
2. image = image to be moving
3. display bckgrnd to screen
4. display image onto screen
5. overwrite image with portion of bckgrnd that belongs
   there
6. repeat processes 4 & 5

THIRD WAY
1. bckgrnd = the background bitmap
2. image = image to be moving
3. display bckgrnd to screen
4. display image onto screen
5. move & display image onto screen
6. write portion of bckgrnd that is no longer
   occupied by the moved image.
7. repeat processes 5 & 6

Last method is most difficult and should not need
multiple screen pages.

HOPE this helps.

--Lucius Lamar Hilley III
--  E-mail at luciuslhilleyiii at juno.com
--  I support transferring of files less than 60K.
--  I can Decode both UU and Base64 format.