Getting a Sprite to Chase the Player

[Jonathan Cauldwell]

This won't work for versions up to and including v2.7.

Put a couple of lines at the end of your player sprite type:


LET O = X
LET P = Y


Then use the following code to hunt the player. The line IF PARAMA > 1 can be adjusted to alter the speed of the pursuer.


ADD 1 TO PARAMA
IF PARAMA > 1
 LET PARAMA = 0
 IF Y > P
   IF CANGOLEFT
     SPRITELEFT
   ENDIF
 ELSE
   IF Y <> P
     IF CANGORIGHT
       SPRITERIGHT
     ENDIF
   ENDIF
 ENDIF
 IF X > O
   IF CANGOUP
     SPRITEUP
   ENDIF
 ELSE
   IF X <> O
     IF CANGODOWN
       SPRITEDOWN
     ENDIF
   ENDIF
 ENDIF
ENDIF


[lukebord1]

Just checked for my current AGD game, works like a charm! Thanks Jonathan...
That code deserves its specific category inside the sprite events!

[jammajup]

Does any of this code differ for version 4.5?,I was planning to use this follow player code for baddies which spawn in certain screens when the player has been playing for X amount of time,I have the o=x p=y in my initialise sprite as it is used to respawn player at location of death and are begining to think that it might be interfering with the follow code.
Anyway I have followed instructions above and inserted let o=x p=y In player code and inserted the second block of code in my new enemy sprite 5 and are getting odd effects,The enemy on screen one starts ontop of player killing him and all other enemies on other screens start on upper top left of screen,I have also tried changing the o,p varable to something different like m n

[Jonathan Cauldwell]

This code should still work in version 4.5.

Reading your post, I'm just wondering if you forgot to use a separate LET for each variable? Either that or perhaps you have used one or both of these variables elsewhere.

[jammajup]

Last night I decided to load my more recent file and again sit down with it and the chase code was working!that is twice I have switched off frustrated with new code inserted not working and next session the game has been fine lol,must be some sort of over written code in memory type thingy (no I don't actually know).