global variables
Posted: Sat Aug 06, 2005 9:26 am
how can I define global variables for a pawn that can be accessed by other pawns?
1. You can use the LevelController entity.
I never used it sriously, see the online docs...LevelController Scripting
There can be multiple level controllers in a script, each sharing the same script. (Pawns do not share their script. The Level Controller Entity does.) They can each have their own Start orders and can share global variables within the script. Level Controller scripts always run at a Low Level.
I use a different way. You can see my scripts in my demos to see this in action.
2a. The first method is to use the SetAttribute("YourAttribute", <value>); in your script. You have to declare this Attribute in the Player.ini in the "install" folder.
then the other scripts can obtain the value using the command GetAttribute("YourAttribute")[YourAttribute]
initial = <initial value>
low = <minimum value>
high = <maximum value>
for example:
Primary script
Secondary scriptSetAttribute("YourAttribute", 1);
orif(GetAttribute("YourAttribute")=10)
{
do something;
}
note that the GetAttribute command is influenced by the self.ThinkTime variable. So if self.ThinkTime=0.1; then the script will read the Attribute 10x times in a second; if self.ThinkTime isn't set the GetAttribute command will be executed every frame influencing all the script execution because this is a red/write operation of the engine: it reads directly the file attribute.txt in your RF root folder.TORQUEFORCE=GetAttribute("YourAttribute");
2b. Another way is to use the SetEventState("YourTrigger", <true or false value>); I prefer this method is much faster than SetAttribute. You don't have to create in the Level Editor a Trigger Entity. The SetEventState automatically creates the entity. For example, if you want to spawn a Spout entity, you don't have to create a Trigger Entity called, for example, "spout_on"; simply put in the right place of you script the SetEventState("spout_on", true); command (and eventually the SetEventState("spout_on", false);) and the Spou entity will turn on.
You can obtain the value using the GetEventState("YourTrigger")
for example:
this is a faster way to share an input between different pawns and scripts. Otherwise if you need to share numerical value you have to use the SetAttribute command. Remember that it works only with integer values. So if you want to share the variable APPLE=0.001 you have to do something like this:if(GetEventState("YourTrigger")=true)
{
do something;
}
Primary script
Secondary scriptAPPLE=0.001;
SetAttribute("MyApple", APPLE*10000);
As I said, this command slows down all the scripts esecution. You probably should control it in some way. For example, in my tocco.s script in my Ping!DEMO1.3b (you can found it in my download page) I placed all the SetAttribute GetAttribute commands in a "one shot" Order. When one of the players set a point or makes a fault, the script execute an order (2 second of time is enough...) that manages the Attributes and the Triggers.APPLE=(GetAttribute("MyApple"))/10000;
I hope this explains...RunPlayer_Game[()
{
// aggiungere controllo game + mantieni attributi
debug(GetAttribute("Ai_Game"));
debug(GetAttribute("Player_Game"));
if(((GetEventState("Win_Player")=true)or(GetEventState("Win_Player2")=true))and(PLAYER_GAME!=2))
{
SetAttribute("Player_Game", PLAYER_GAME+1);
}
if(((GetEventState("Win_Player")=true)or(GetEventState("Win_Player2")=true))and(((PLAYER_GAME=2)and(AI_GAME=2))or((PLAYER_GAME=1)and(AI_GAME<1))))
{
SetAttribute("Player_Game", PLAYER_GAME+1);
SetEventState("Win_Player2", true);
SetEventState("Win_Player", false);
}
if(((GetEventState("Win_Ai")=true)or(GetEventState("Win_Ai2")=true))and(AI_GAME!=2))
{
SetAttribute("Ai_Game", AI_GAME+1);
}
if(((GetEventState("Win_Ai")=true)or(GetEventState("Win_Ai2")=true))and(((AI_GAME=2)and(PLAYER_GAME=2))or((AI_GAME=1)and(PLAYER_GAME<1))))
{
SetAttribute("Ai_Game", AI_GAME+1);
SetEventState("Win_Ai2", true);
SetEventState("Win_Ai", false);
}
if(self.time>TIME+2)
{
SetEventState("Adv_Player", false);
SetEventState("Adv_Ai", false);
SetAttribute("Ai_Points",0);
SetAttribute("Player_Points",0);
SetEventState("Win_Player", false);
SetEventState("Win_Ai", false);
SetEventState("AI_Pos",true);//TeleportEntity("AI", "Ai_Start");
TeleportEntity("PLAYER", "Player_Start");
self.think="RunPlayer";
return 0;
}
}
}]
