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CS1322/p6/MyWay2/CGhostAI.java

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+/**
+ *  <PRE>
+ *  CGhostAI.java
+ *
+ *  Revisions: 1.0 Nov. 23, 2002
+ *               Created the CGhostAI class
+ *
+ *  </PRE>
+ *
+ *  @author <A HREF="mailto:gtg184g@mail.gatech.edu">Jose Manuel Caban</A>
+ *  @version Version 1.0, Nov. 23, 2002
+ */
+
+import java.util.*;
+
+public class CGhostAI extends CIntelligence implements Constants{
+  
+  /**
+   *This GhostAI uses a more classicPacman-like AI system
+   *Considering the fact that pacman isn't Half-Life, we don't need
+   *to do any searches to find Pacman, Pacman will eventually run into
+   *the ghosts.
+   *
+   *Basically, if the Ghost "sees" Pacman, that is, Pacman is within the
+   *Ghost's Line of Sight, the ghost will increase his speed to equal Pacman's
+   *(in this case I'm setting the speeds to be 3,2,1: 3 = Pacman speed,
+   *2 = Ghost regular speed, 1 = Ghost zombied speed)
+   *and the Ghost will head in Pacman's direction at full speed until pacman 
+   *hits a new node (a Pacman hit Node event occurs) where the new direction
+   *Pacman chooses will be sent back to the Ghost and the Ghost will return to
+   *moving at normal speed (which is slightly slower than pacman but much faster
+   *than the speed at which they move when zombied out.
+   *
+   *@param CNode, the Ghost's current node
+   *@param CGhost, the Ghost to be analyzed
+   *@param CCoord, pacmans coordinate
+   */
+  public int doMove(CNode  cLastNode, CGhost cGhost, CCoord cPacPos){
+  	int wayToGo;
+  	  	  	
+  	if(cGhost.getX() == cPacPos.getX()){
+  		if(cGhost.getY() < cPacPos.getY()){
+  			wayToGo = cLastNode.canMV_DN()?MV_DN:MV_SAMEDIR;
+  		}
+  		else{
+  			wayToGo = cLastNode.canMV_UP()?MV_UP:MV_SAMEDIR;
+  		}
+  	}
+  	
+  	else if(cGhost.getY() == cPacPos.getY()){
+  		if(cGhost.getX() < cPacPos.getX()){
+  			wayToGo = cLastNode.canMV_RIGHT()?MV_RIGHT:MV_SAMEDIR;
+  		}
+  		else{
+  			wayToGo = cLastNode.canMV_LEFT()?MV_LEFT:MV_SAMEDIR;
+  		}
+  	}
+  	else {
+  		//if the ghost can't see pacman then
+  		Random rando = new Random();
+  		wayToGo = rando.nextInt(MV_SAMEDIR);
+  	}
+  	return wayToGo;  		
+  }//end doMove()
+  
+}// end of class CGhostAI