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Seong
Feb 25, 2014, 1:07:11 AM2/25/14
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/*
* Hi, Gama.
*
* I am wondering if I can declare a global action, and then use it for agents.
* Even though I could declare an action in the global section, I cannot use it for agents, e.g. in the entities section or the init/create section.
*
* In addition, I'd like to use the keyword 'void' instead of 'action' for actions that do not return a value.
*
* Please see the code below, especially the 'Question 1a', 'Question 1b', 'Question 2' parts.
*
* Thanks for your comments in advance,
* Seong
*
*/
model test001
global {
int x <- 0;
int y <- 0;
int z <- 0;
action setX(int i) {
x <- i;
}
int getX {
return x;
}
init {
do setX(10);
create dummy number: 1 {
//Question 1a:
//Can I do an action, which is declared in the global section, here?
//do setX(9);
}
}
}
entities {
species dummy {
reflex basic_step {
do setY(1);
}
action setY (int num) {
//z <- num; // set y from the parameter of the action
y <- x * 2; //set y from the global int value 'x'
//Question 1b:
//I could declare an action called 'getX' in the global section.
//I am wondering if I can use it in the entities section like below.
//z <- getX; //set z by using an action that is declared in the global section
}
int getY {
return y;
}
//Question 2: I can't use the keyword 'void' instead of 'action'. Maybe you need to admend this point.
//void setZ (int num) { z <- num;}
}
}
experiment test001 type: gui {
output {
display global_information refresh_every: 1 {
chart "values" type: series background: rgb("white") size: {1,0.4} position: {0, 0.05} {
data "x" value: x color: rgb("blue") ;
data "y" value: y color: rgb("green") ;
data "z" value: z color: rgb("red") ;
}
}
}
}
Patrick Taillandier
Feb 25, 2014, 3:50:05 AM2/25/14
to gama-p...@googlegroups.com
Hi
First, in the current version of GAMA, you can not use the keyword "void" instead of "action".
Concerning the use of a global action by an agent, you can ask the world agent to apply it:
ask world {
do global_action;
}
or, if your action returns something, you can directly write something like:
int val <- world.global_action();
I answer your specific questions in the following model:
ask world { // or ask myself here
do setX(9);
}
//Question 1a:
//Can I do an action, which is declared in the global section, here?
//do setX(9);
}
}
}
entities {
species dummy {
reflex basic_step {
do setY(1);
}
action setY (int num) {
//z <- num; // set y from the parameter of the action
y <- x * 2; //set y from the global int value 'x'
z <- world.getX();
//Question 1b:
//I could declare an action called 'getX' in the global section.
//I am wondering if I can use it in the entities section like below.
//z <- getX; //set z by using an action that is declared in the global section
}
int getY {
return y;
}
//Question 2: I can't use the keyword 'void' instead of 'action'. Maybe you need to admend this point.
//maybe in the further but not for the moment
//void setZ (int num) { z <- num;}
}
}
experiment test001 type: gui {
output {
display global_information refresh_every: 1 {
chart "values" type: series background: rgb("white") size: {1,0.4} position: {0, 0.05} {
data "x" value: x color: rgb("blue") ;
data "y" value: y color: rgb("green") ;
data "z" value: z color: rgb("red") ;
}
}
}
}
Cheers,
Patrick
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