Version: GM 5+6	Views: 4651
Filesize: 1499 byte

Move towards instance nearest

(32 votes)

A script which let the object move towards the nearest instance with a small change of direction per step. Useful for a heat seaking missile.

//////////////// MOVE TOWARDS NEAREST ////////////////////
//
// Copyright Simon Donkers 3-7-2006
// www.simondonkers.com - gmmentor@simondonkers.com
//
// argument0 is object name
// argument1 is max change or cource per turn. (optional)
// Use 360 to make it move in a straight line
// when using multiple objects select one parent object.
// Note: set the speed yourself!
//
/////////////////////////////////////////////////////
var nearest,change,wanted;
if instance_exists(argument0) then
  {
  if (argument[1]=0)
   argument[1]=10;
  nearest=instance_nearest(x,y,argument0)
  wanted := point_direction(x,y,nearest.x,nearest.y);
  change=min(abs(direction-wanted),argument1);
  if direction-wanted>180 then
   direction += change;
  else
   if wanted-direction>180 then
   direction += -change;
   else
   if direction-wanted<180 and direction-wanted>0 then
   direction += -change;
   else
   direction += change;
  if direction>360 then
   direction += -360;
  if direction<0 then
   direction += 360;
  }

Tip: Have a look at the tutorial How to execute a script

User comments

Injection posted at 2006-01-16 19:51:29
Nice no bugs. I'll use this in my game.

ZeRo posted at 2006-11-28 13:20:35
How to set a speed???

Simon Donkers posted at 2006-11-28 18:58:16
speed:=5;

mohammed-f posted at 2007-01-14 13:19:44
but there is already 2 funtions for this. one of them was : mp_linear_.... (cant remember exacetly)

Simon Donkers posted at 2007-01-14 17:15:10
This script was released before mp_linear was added, this script has no collision checking or avoiding and runs faster. How often have you seen a heat seaking missile move through a maze? These functions are completely different, do different things and can't be compared.

scorpafied posted at 2007-05-17 04:21:03
i put this script in my game and it comes up with errors or unknown variables please someone explain

werewolf posted at 2007-05-23 10:10:15
___________________________________________ ERROR in action number 2 of Create Event for object explorer: In script homing script: Error in code at line 8: wanted := point_direction(x,y,nearest.x,nearest.y); at position 42: Unknown variable x

werewolf posted at 2007-05-23 10:28:12
i dont really get this whole thing... i dont know anything about scripting but i thought copying and pasting this into a new script file and renaming argumento to the objects name would do it. but no? what did i do wrong?

werewolf posted at 2007-05-23 20:25:19
tsch this thing dont work.. even if i do exactly everything your crappy instructions say the projectile only goes toward the enemies sometimes when they are above my character and they dont follow them... they will go towards them when they are spawned and then go strieght past them and hit the wall. boo on you.

scorpafied posted at 2007-06-05 02:19:14
i have been working on a example it shows a great simple way to make quick effective homing missiles heres the link: http://shelbymustang500.googlepages.com/homingmissileexample.gm6 credit scorpafied if used

Works Great ^_^ posted at 2007-06-12 04:15:57
Thanks! Something that works just like it says it will for once!

scorpafied posted at 2007-06-21 04:02:06
yeah im glad you people like it!! it works better when you put it into a game surprisingly but yeah i think simon should put it on this site and give me credit for being the creator

jonat posted at 2007-07-09 15:00:38
how do you make something follow a certain object

joe posted at 2007-10-08 21:53:57
i have an idea, can you please post an example of this script, with the object names and everything put in, so we know where to put them

joe posted at 2007-10-08 21:55:48
oh crap nvm, someone already did that my bad

someone posted at 2008-02-13 10:23:45
it works, cool! thanks

anonomys posted at 2008-05-31 04:43:40
so can i get something that can folow an object around and never stop but not a script just events and actions for version 5.3

anonomys posted at 2008-06-05 08:57:52
How u load it into the game?

eastley posted at 2008-07-27 04:48:34
I have an error: When I use the script, and press left, the homing object moves left, and just keeps moving left untill it hits a wall, then just sticks to the wall the whole time. How come the object won't try to chase me down?

heromedel posted at 2008-08-03 03:06:47
I got it too work just fine just rember not to use 360 because 360 will equal 0 and that means a straight line I used 359 as max also dont change the argument with no number I didnt change it because it syas agrument0 is the target and agrument1 is the max so I dont know what the non numbered agrument is so I didnt touch it and like I said it works fine for me

Move towards instance nearest

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