Path Finder Error

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Path Finder Error

ID:143952

May 17 2007, 9:06 am

Poal

Problem description:

I'm making a game, its an RTS an u select a unit and click the icon on what to build, but I just put in a path finder and an error comes up each time I click build. Help

Error:

runtime error: Cannot read null.x
proc name: dd get dist (/proc/dd_get_dist)
  usr: Poal (/mob)
  src: null
  call stack:
dd get dist(Snow (3,4,1) (/turf/Snow), null)
/BaseCamp/PathController (/BaseCamp/PathController): Path(10)
/BaseCamp/PathController (/BaseCamp/PathController): StepTowards(Build Center (/obj/hud/HUD/Build_Center), 0, 10)
Spartan (/mob/Spartan): base StepTowards(Build Center (/obj/hud/HUD/Build_Center), 0, 10)
Spartan (/mob/Spartan): base EventCycle(120)
GameController (/BaseCamp/GameController): EventCycle()
GameController (/BaseCamp/GameController): EventCycle()
GameController (/BaseCamp/GameController): EventCycle()
runtime error: Cannot read null.x
proc name:  search (/BaseCamp/PathController/proc/_search)
  usr: Poal (/mob)
  src: /BaseCamp/PathController (/BaseCamp/PathController)
  call stack:
/BaseCamp/PathController (/BaseCamp/PathController):  search()
/BaseCamp/PathController (/BaseCamp/PathController): Path(10)
/BaseCamp/PathController (/BaseCamp/PathController): StepTowards(Build Center (/obj/hud/HUD/Build_Center), 0, 10)
Spartan (/mob/Spartan): base StepTowards(Build Center (/obj/hud/HUD/Build_Center), 0, 10)
Spartan (/mob/Spartan): base EventCycle(120)
GameController (/BaseCamp/GameController): EventCycle()
GameController (/BaseCamp/GameController): EventCycle()
GameController (/BaseCamp/GameController): EventCycle()
runtime error: Cannot read null.x
proc name: dd get dist (/proc/dd_get_dist)
  usr: Poal (/mob)
  src: null
  call stack:
dd get dist(Spartan (/mob/Spartan), null)
/BaseCamp/PathController (/BaseCamp/PathController): StepTowards(Build Center (/obj/hud/HUD/Build_Center), 0, 10)
Spartan (/mob/Spartan): base StepTowards(Build Center (/obj/hud/HUD/Build_Center), 0, 10)
Spartan (/mob/Spartan): base EventCycle(120)
GameController (/BaseCamp/GameController): EventCycle()
GameController (/BaseCamp/GameController): EventCycle()
GameController (/BaseCamp/GameController): EventCycle()

What's it mean?

May 17 2007, 9:34 am
Jmurph	Well, the PathFinder routine works by determining a path to the clicked thing. Here, you clicked a HUD object and passed a null reference to dd get dist(), so it spits an error. You're going to need to add some sort of check or state system that call the PathFinding procs only when appropriate.

May 17 2007, 9:35 am
CaptFalcon33035	Means you are sending an atom, which does not exist, through the procedure and you are trying to read its x value.

May 17 2007, 9:41 am In response to Jmurph
Poal	Oh ty

May 17 2007, 9:45 am (Edited on May 17 2007, 9:59 am) In response to Poal
Poal	Oh and another problem, I have resource gathering and when I click the Cut Wood HUD icon, the selected unit goes to the FARTHEST tree on the map to cut it...How come?