Xpounded Simple AI Player Library

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<STYLE>

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<SCRIPT Language="JavaScript">
aiplay={	//AI Player library
	gump:function(){	//pattern controled motion
		this.dx=0						//directional increase
		this.dy=0						//directional increase
		this.pat=new Array()				//stores the pattern
		this.counter=0					//current command count
		this.index=-2					//current command index
		this.patlength=0					//total number of commands
		this.curaction=0					//current command
		this.pattern=_pattern
		this.move=_move
		this.action=_action
		function _pattern(n){			//sets the pattern (can change on the fly)
			var v=n.split(",")
			for(var i in v){
				this.pat[i]=v[i]
			}
			this.patlength=this.pat.length
			this.counter=0
			this.index=-2
		}
		function _move(obj){			//actualizes commands based on command-length pairs
			if(this.index<this.patlength){
				if(this.counter==0){
					this.index+=2
					this.counter=parseInt(this.pat[this.index+1])
				}
				this.counter--
				this.curaction=parseInt(this.pat[this.index])
				this.action(obj,this.curaction)
			}
		}
		function _action(obj,n){			//interprets the current command
			//change this to your own set of command responses
			switch(n){
				case 1:					//move up screen
					this.dx=0;this.dy=-10;break;
				case 2:					//move right
					this.dx=10;this.dy=0;break;
				case 3:					//move down screen
					this.dx=0;this.dy=10;break;
				case 4:					//move left
					this.dx=-10;this.dy=0;break;
				case 5:					//stop moving
					this.dx=0;this.dy=0;break;
				case 6:					//loop pattern indefinitly
					this.counter=0
					this.index=-2
					break;
			}
			obj.style.posLeft+=this.dx
			obj.style.posTop+=this.dy
		}
	},
	gamp:function(){	//simple track/evade
		this.track=_track
		this.evade=_evade
		function _track(obj2,obj1){
			var dx=((obj2.style.posLeft>obj1.style.posLeft)?(-10):(obj2.style.posLeft<obj1.style.posLeft)?10:0)
			var dy=((obj2.style.posTop>obj1.style.posTop)?(-10):(obj2.style.posTop<obj1.style.posTop)?10:0)
			obj2.style.posLeft+=dx
			obj2.style.posTop+=dy
		}
		function _evade(obj2,obj1){
			var dx=((obj2.style.posLeft>obj1.style.posLeft)?(10):(obj2.style.posLeft<obj1.style.posLeft)?-10:(Math.random(0)>.5)?10:-10)
			var dy=((obj2.style.posTop>obj1.style.posTop)?(10):(obj2.style.posTop<obj1.style.posTop)?-10:(Math.random(0)>.5)?10:-10)
			obj2.style.posLeft+=dx
			obj2.style.posTop+=dy
		}
	},
	gimp:function(){	//behavior
		this.aggression=Math.random(0)
		this.base=20			//play with this constant
		this.stability=this.base
		this.fight=_fight
		function _fight(obj2,obj1){
			var dx=obj2.style.posLeft-obj1.style.posLeft
			var dy=obj2.style.posTop-obj1.style.posTop
			var dist = Math.sqrt(Math.pow(dx,2)+Math.pow(dy,2))
			if(this.stability-- <0){
				this.stability=Math.random(0)*this.base+10
				if(dist>100)this.aggression=1
				else{this.aggression=Math.random(0)}
			}
			if(this.aggression>.95)return true
			return false
		}
	},
	proximity: function(obj1,objArray){	//returns the object in objArray that is closest to obj1
		var xn,yn,rn
		var rm=10000		//some large number
		var rr=0
		for(var i=0;i<objArray.length;i++){
			obj2 = objArray[i]
			xn=obj2.style.posLeft-obj1.style.posLeft
			yn=obj2.style.posTop-obj1.style.posTop
			rn=Math.sqrt(Math.pow(xn,2)+Math.pow(yn,2))
			if(rn<rm){rm=rn;rr=i}
		}
		return objArray[rr]
	}
}
//----------------------------------------------------------------
//set up some aiplay objects
var ai1=new aiplay.gump()	//for blue player (pattern follower)
var ai2=new aiplay.gump()	//for green player (pattern follower)
var ai3=new aiplay.gump()	//for yellow player (pattern follower)
var ai4=new aiplay.gamp()	//for red player (track\evade)
var ai5=new aiplay.gimp()	//for red player (behavior to govern actions)

function init(){
	//assign the patterns
	ai1.pattern(mvs1)	
	ai2.pattern(mvs2)
	ai3.pattern(mvs3)
	iTimer = window.setInterval("mainlop()",100);
}
var iTimer 
//The movement patterns are strings of command-length pairs.
//1st number of a pair is the command, the 2nd is the # of turns to execute the command.
var mvs1="2,2,3,4,4,6,1,8,2,10,3,12,4,14,1,16,5,100"		//a simple spiral box pattern
 	mvs1+=",2,20,3,4,4,20,1,4,2,20,3,4,4,4,3,4,4,4" 	//rectangle and drop down pattern
	mvs1+=",3,2,2,4,4,6,1,2,4,10,2,12,6,1"			//make it as complex as you like.

var mvs2="2,20,3,4,4,20,1,4,2,20,3,4,4,4,3,4,4,4"
	mvs2+=",2,2,3,4,4,6,1,8,2,5,3,12,4,14,1,16,5,100"
	mvs2+=",3,2,2,4,4,6,1,2,4,10,2,12,6,1"

var mvs3="3,2,2,4,4,6,1,2,4,10,2,12"
	mvs3+=",2,2,3,4,4,6,1,8,2,5,3,12,4,14,1,16,5,100"
	mvs3+=",2,20,3,4,4,20,1,4,2,20,3,4,4,4,3,4,4,4,6,1"

function mainlop(){
		//Make objects to follow a patterns
	ai1.move(d1)			//this assigns pattern msv1 to d1
	ai2.move(d2)
	ai3.move(d3)

//Find the AI Player closest to dtracker
	dt=aiplay.proximity(dtracker,Array(d1,d2,d3))
		//If the Tracker is feeling agressive then track the closest player
	if(ai5.fight(dtracker,dt))ai4.track(dtracker,dt)
		//Otherwise evade the closest player.
	else{ai4.evade(dtracker,dt)}
}

</SCRIPT>
</HEAD>
<BODY onload="init()">
<div id="d1" style = "position:absolute;top:200px;left:100px;width:10;height:10;background:blue">H</div>
<div id="d2" style = "position:absolute;top:150px;left:400px;width:10;height:10;background:green">H</div>
<div id="d3" style = "position:absolute;top:200px;left:200px;width:10;height:10;background:yellow">H</div>

<h3>The non red players are pattern followers</h3>
<h3>The red player is a tracker/evader <br>with its behavior based on the proximity of the non red players.</h3>
<b>You want a simple AI player, and you want easy to use junk instead of the mind-numbing cs juice?<br>
Well I hear ya. Here is a simple AI player starter library - it has<br>
simple pattern following, simple tracking/evasion, and a simple behavior routine<br>
all rolled into one little starter library.<br>
Learn how to simulate a player mind with the aiplay libraries gamp gimp and gump object resources<br>
Add what you want to the library and turn the little guys loose.</b>

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