Virtual object management: Giving objects their own code

[LemonWizard]

This is incomplete.
But here's the sample.
I've been working on this concept for a long time.

PlayBASIC Code: [Select]

; PROJECT : Project1
; AUTHOR  : NA
; CREATED : 1/15/2012
; ---------------------------------------------------------------------

writefile  "C:/object1.txt", 1
writeint 1, 100
for temp=1 to 100
   writestring 1, "test"
next temp
closefile 1
   

type object1
   x1
   y1
   x2
   y2
   code$(100)
   name$
endtype
;simple interpreter

dim objects(10) as object1

for temp=1 to 10
   readfile "C:/object1.txt", 1
   objects(temp).name$="enemysprite"
amount=readint(1)

;dim objects(temp).code$(amount)
for temp2=1 to amount
objects(temp).code$(temp2)=readstring$(1)
next temp2
closefile 1

next temp
   
for temp=1 to 100
   print "object number 1 command number "+ str$(temp)+" is equal to : "
   print objects(1).code$(temp)
   sync 
   cls rgb(0,0,0)
   
   waitkey 
   waitnokey
next temp




function object_hits_object(number1, number2)


x1=objects(number1).x1
y1=objects(number1).y1
x2=objects(number1).x2
y2=objects(number1).y2

x3=objects(number2).x1
y3=objects(number2).y1
x4=objects(number2).x2
y4=objects(number2).y2

;check collision on right side
if x2=>x3
   if x1<=x4
      if y1<=y4
         if y2=>y3
            result=true
         endif
      endif
   endif
endif
            


endfunction, result

The idea is that it loads blocks of string code into the objects themselves.
Hopefully I can make a simple scripting system which will allow the code for a single object in game to be hundreds of lines of code long.
Making abstracting objects easier since most of the code for an object will be contained externally.
we shall see.

[kevin]

  The script doesn't need to be a part of the object at all..  Rather, when script is executed, it's passed a pointer to the owner, but that's getting a bit of ahead of ourselves.    For starters you need to use a more dynamic approach like so,

PlayBASIC Code: [Select]

   Type tScript
         CodeArrayHandle
   EndType

   Dim Scripts(0) as tScript

   cr$=chr$(13)+chr$(10)

   For lp =1 to 10
         ; make some text to represent the script in the demo
         Code$="; Script #"+str$(lp)+Cr$
         for lp2=0 to rnd(10)
            code$+=" Line #"+str$(lp2)+cr$         
         next

         ; create the script
         NewScript(Code$)
   next


   ; create an array stub 
   MakeArray ScriptCode$()
         

   ; show whats in the scripts are in the scripts() array
   For lp =0 to GetArrayElements(Scripts())
      ; check if there's anything at this position in the array
      if Scripts(lp)
   
         ; Assign our script code array stub the array handle of our script
         ScriptCode$()   =Scripts(lp).CodeArrayHandle

         ; call the show routine
         ShowArray(ScriptCode$())
      endif
   next
   
   
   Sync
   waitkey
   



Function NewScript(Code$)
      index=getfreecell(Scripts())

      if Index>0
         MakeCodeArray(Code$)
         Scripts(Index).CodeArrayHandle=MakeCodeArray(Code$)
      endif
      
EndFunction Index


Function ShowArray(Code$())

      Cls 0
      for lp =0 to GetArrayElements(Code$())
         print Code$(lp)
      next
      Sync
      waitkey
      waitnokey

EndFunction


Function MakeCodeArray(Code$)
      Dim code$(0) 
      Code$=replace$(code$,chr$(10),"")
      Count=SplitToArray(code$,chr$(13),Code$())
EndFunction Code$()   
   

  This creates a string array for each script fragment,  the script structure just holds the handle of the created array,  which can access via an array stub.  


Related examples:

   The following related examples use the CallFunction command to conceptually attach methods to types.

  * Action GUI
  * Abstraction Layer
  * Hell Eagle Mock Up