GameMaster.java

/*

* GameMaster.java
*
* Created on June 13 2006
* Last Modified June 14 2006
* 
* This class oversees games played between agents
*/

package CoopNetBlue; import uchicago.src.sim.gui.NetworkDrawable; import uchicago.src.sim.network.DefaultDrawableNode; import uchicago.src.sim.gui.DrawableNonGridNode; import uchicago.src.sim.util.Random; import uchicago.src.sim.gui.OvalNetworkItem; import java.awt.Color; import uchicago.src.sim.gui.ColorMap; import uchicago.src.sim.engine.CustomProbeable; import java.util.ArrayList; /**

*
* @author Jack Waddell
* 
*
*/

// GameMaster Constructor public class GameMaster {

   // GUIModel: Stores the model class that runs the graphics
   public static GUIModel        guiModel = null;

   // model: stores the base model
   public static CoopNetBlue     model;

   // agentList: Stores a pointer to the agents list
   public ArrayList<CustomNode>  agentList;
   
   
   public GameMaster (ArrayList agentList) {

// If the agent list pointer is sent from CoopNetBlue // then changing the list here changes it there as well. this.agentList = agentList;

   }
    

   ////////////////////////////////////////////////////////////
   // playPair
   // Inputs: nodei, nodej
   // Output: none
   // Plays a game between two nodes nodei, nodej (symmetric)
   public void playPair(CustomNode nodei, CustomNode nodej){

if (nodei.getUtility() > 0 & nodej.getUtility() > 0 ){

// Dumb game. Flip a coin. double randn = model.getUniformDoubleFromTo(0,1); if (randn < 0.5){ nodei.incUtility(); nodej.decUtility(); } else{ nodej.incUtility(); nodei.decUtility(); } }

   }

   /////////////////////////////////////////////////////////////
   // playAll
   // Inputs: none
   // Output: none
   // Traverses the agent list, playing a game once between
   //  all pairs of neighbors on the network.
   public void playAll(){

//for (CustomNode nodej : agentList){ CustomNode nodei, nodej;

// Traverse the agent list for (int i = 0; i < agentList.size(); i++){ nodei = agentList.get(i);

// Get current node's neighbors: symmetric network // means that out neighbors are just neighbors. ArrayList<CustomNode> neighbors = nodei.getOutNodes(); for (int j = 0; j < neighbors.size(); j++){ nodej = neighbors.get(j);

// To ensure game played once between each pair // only play in one direction. if (nodej.getID() < nodei.getID()) playPair(nodej, nodei); } }

    }

   //////////////////////////////////////////////////////////////
   // evolveAgents
   // Inputs: none
   // Output: none
   public void evolveAgents(){

// Need this to draw the node in the graphics mode. OvalNetworkItem drawable = new OvalNetworkItem(0,0);

int i=0,j=1; // These will be two random values, unequal CustomNode nodei, nodej; int numAgents = agentList.size(); do{ i = model.getUniformIntFromTo(0, numAgents-1); j = model.getUniformIntFromTo(0, numAgents-1);

nodei = agentList.get(i); nodej = agentList.get(j);

} while (nodei.getUtility() == nodej.getUtility()); // This makes sure that there are no ties, and also that // i and j are different.

CustomNode winner, loser;

// Find which wins if (nodei.getUtility() > nodej.getUtility()){ winner = nodei; loser = nodej; } else{ loser = nodei; winner = nodej; } winner.bearChild(); loser.die();

   }

   //***********************************************************
   // Getters and Setters

   public static void setModel(CoopNetBlue m) {model = m;}
   public static void setGUIModel(GUIModel m) {guiModel = m;}

}