It is possible to forward parameters from the command line to GroIMP using additional parameters beginning with an capital X. This parameter can than be accessed by all models opened.

For a model that is suppose to greed the user this additional parameter could be the name, therefore the command line parameter would be -Xname=“gaetan”. To access this parameter than in GroIMP the function getProperty of the class Main needs to be called:

import de.grogra.pf.boot.Main;
 
public void sayHi(){
  println("hallo "+Main.getProperty("name"));
}

This works with multiple parameters and is especially useful in the headless mode:

import de.grogra.pf.boot.Main;
protected void startup()
{
	super.startup();
	if (Main.getProperty("headless") != null)
	{
		runLater(null);
	}
}
 
 
protected void run(Object info)
{
	println("hallo " + Main.getProperty("name"));
}

This provides the possibility to forward knowledge/information or the path to specific configuration to a GroIMP model without changing the model.