var can; var c; var worm; var touch; var foods; window.onload = function(){ can = document.getElementById("can"); can.width = window.innerWidth; can.height = window.innerHeight; c = can.getContext("2d"); touch = new Touch(); can.addEventListener("touchstart", function(e){ /* try{ e.preventDefault(); }catch(Exception){ } */ touch.start(e); }); can.addEventListener("touchmove", function(e){ touch.move(e); }); can.addEventListener("touchend", function(e){ touch.end(e); }); worm = new Worm(can.width/2, can.height/2); //console.log(worm); foods = []; for(var i=0;i<10;i++){ foods.push(new Food(Math.random() * can.width, Math.random() * can.height, 5)); } loop(); } function loop(){ c.fillStyle = "#815F4B"; c.fillRect(0, 0, can.width, can.height); for(var i=0;i=0;i--){ this.bodyParts[i].render(c); } } this.control = function(touch){ this.bodyParts[0].angle = touch.angle; this.bodyParts[0].dist = touch.dist/18; } this.update = function(){ for(var i=1;i= this.r || allowed){ this.x += Math.sin(this.angle) * this.dist; this.y += Math.cos(this.angle) * this.dist; } if(this.x < 0){ this.x += can.width; } if(this.x > can.width){ this.x -= can.width; } if(this.y < 0){ this.y += can.height; } if(this.y > can.height){ this.y -= can.height; } } this.follow = function(bodyPart){ var smallestDist = can.width; var smallestDistAngle = 0; for(var i=-1;i<=1;i++){ for(var j=-1;j<=1;j++){ var dist = Math.hypot(bodyPart.x - this.x + i*can.width, bodyPart.y - this.y + j*can.height); if(smallestDist > dist){ smallestDist = dist; smallestDistAngle = Math.atan2(bodyPart.x - this.x + i*can.width, bodyPart.y - this.y + j*can.height); } } } this.dist = smallestDist/8; this.angle = smallestDistAngle; } } function Food(x, y, r){ this.x = x; this.y = y; this.r = r; this.color = "hsl(" + parseInt(Math.random() * 360) + ", 50%, 50%)"; this.render = function(c){ c.fillStyle = this.color; c.beginPath(); c.arc(this.x, this.y, this.r, 0, 2*Math.PI); c.fill(); } }

worm || touch only