Math.dotProduct2=function(ax,ay,bx,by){return ax*bx+ay*by;}
function FlockController(canvas,options){var defaults={alignmentPriority:2,cohesionPriority:1,frameRate:34,maxRotation:30*Math.PI/180,minSpeed:3,maxSpeed:5,numBoids:30,rotationSpeed:0.1,separationDistance:35,separationPriority:3,targetPriority:3,visualField:Math.PI*270/180,visualRange:50,};var boids=new Array();var cosVisualFieldDiv2;var redrawInterval;var settings={};var targetX=440;var targetY=200;var imgwidth=30;var imgheight=15;var timer;var visualRangeSqr;var img=new 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';if(!canvas.getContext)
throw new Error('Canvas is not supported by your browser.');var ctx=canvas.getContext('2d');var drawBoid=function(boid){ctx.drawImage(img,boid.x,boid.y,imgwidth,imgheight);}
var getVisualStats=function(boid){var stats={x:0,y:0,vx:0,vy:0,closestDistance:999999999};var count=0;for(var i in boids){if(boids[i]==boid)
continue;var dx=boids[i].x-boid.x;var dy=boids[i].y-boid.y;var distance=Math.sqrt(dx*dx+dy*dy);if(distance<stats.closestDistance){stats.closestDistance=distance;stats.closestBoid=boids[i];}
var ndx=dx/distance;var ndy=dy/distance;var cosθ=Math.dotProduct2(Math.cos(boid.θ),Math.sin(boid.θ),ndx,ndy);if(dx*dx+dy*dy<=visualRangeSqr&&cosθ>=cosVisualFieldDiv2){stats.x+=boids[i].x;stats.y+=boids[i].y;stats.vx+=boids[i].vx;stats.vy+=boids[i].vy;stats.count++;}}
stats.x/=count;stats.y/=count;stats.θ=Math.atan2(stats.vy,stats.vx);return stats;}
this.animateFrame=function(){img1=new Image();img1.src="slogan.jpg";ctx.drawImage(img1,0,0,1024,500);ctx.drawImage(img3,targetX,targetY,180,91);for(var i in boids)
drawBoid(boids[i]);for(i in boids){var boid=boids[i];var avg=getVisualStats(boid);var tx=boid.vx;var ty=boid.vy;if(avg.closestBoid){var dx=avg.closestBoid.x-boid.x;var dy=avg.closestBoid.y-boid.y;if(avg.closestDistance<settings.separationDistance){tx-=dx/avg.closestDistance*settings.separationPriority;ty-=dy/avg.closestDistance*settings.separationPriority;}}
tx+=Math.cos(avg.θ)*settings.alignmentPriority;ty+=Math.sin(avg.θ)*settings.alignmentPriority;if(avg.count>0){var dx=avg.x-boid.x;var dy=avg.y-boid.y;var distance=Math.sqrt(dx*dx+dy*dy);var ndx=dx/distance;var ndy=dy/distance;tx+=ndx*settings.cohesionPriority;ty+=ndy*settings.cohesionPriority;}
var dx=targetX-boid.x;var dy=targetY-boid.y;var distance=Math.max(Math.sqrt(dx*dx+dy*dy),50);var ndx=dx/distance;var ndy=dy/distance;tx+=ndx*settings.targetPriority;ty+=ndy*settings.targetPriority;var tθ=Math.atan2(ty,tx);var cw=(tθ-boid.θ+Math.PI*4)%(Math.PI*2);var acw=(boid.θ-tθ+Math.PI*4)%(Math.PI*2);var rotation=Math.abs(cw)<Math.abs(acw)?cw:-acw;rotation*=settings.rotationSpeed;rotation=Math.min(Math.max(rotation,-settings.maxRotation),settings.maxRotation);boid.θ+=rotation;boid.updateVelocity();boid.updatePosition();}};this.setTarget=function(x,y){targetX=x;targetY=y;}
this.startAnimation=function(){timer=window.setInterval(this.animateFrame,redrawInterval);};this.stopAnimation=function(){window.clearInterval(timer);};this.updateOptions=function(options){$.extend(settings,options);var newRedrawInterval=1000/settings.frameRate;if(redrawInterval!=newRedrawInterval){if(timer)
this.stopAnimation();redrawInterval=newRedrawInterval;this.startAnimation();}
cosVisualFieldDiv2=Math.cos(settings.visualField/2);visualRangeSqr=settings.visualRange*settings.visualRange;while(boids.length<settings.numBoids)
boids.push(new Boid(Math.random()*canvas.width,Math.random()*canvas.height,Math.random()*Math.PI*2,settings.minSpeed+Math.random(settings.maxSpeed-settings.minSpeed)));while(boids.length>settings.numBoids)
boids.pop();};this.updateOptions(defaults);this.updateOptions(options);}
function Boid(x,y,θ,speed){this.x=x;this.y=y;this.θ=θ;this.speed=speed;this.updatePosition=function(){this.x+=this.vx*this.speed;this.y+=this.vy*this.speed;};this.updateVelocity=function(){this.vx=Math.cos(this.θ);this.vy=Math.sin(this.θ);};this.updateVelocity();}