Simple Slither.io bot

gistfile1.txt

// ==UserScript==
// @name         Slither Bot
// @namespace    http://slither.io/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        http://slither.io/
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    var caref = 1;
    setInterval(function(){
        if (window.snake === null) {
            //window.want_play=true;
            return;
        }
        var sx = window.snake.xx;
        var sy = window.snake.yy;
        var attrack = window.foods.map(function(food){
            if (food === null) return null;
            var fx = food.xx;
            var fy = food.yy;
            var dx = fx-sx;
            var dy = fy-sy;
            var d = dx*dx+dy*dy;
            return [dx, dy, d, food.sz];
        }).reduce(function(a, b){
            if (a === null) return b;
            if (b === null) return a;
            if (a[3] > 10 && b[3] < 10) return a;
            if (a[3] < 10 && b[3] > 10) return b;
            if(a[2] < b[2]) return a;
            return b;
        });
        
        var go_away = window.snakes.map(function(sn){
            if (sn === null) return [];
            if (sn.xx === sx && sn.yy === sy) return [];
            var ox = sn.xx;
            var oy = sn.yy;
            var dx = ox-sx;
            var dy = oy-sy;
            var d = dx*dx+dy*dy;
            var ot = sn.pts.map(function (pt){
                var dx = pt.xx-sx;
                var dy = pt.yy-sy;
                var d = dx*dx+dy*dy;
                return [dx, dy, d/sn.sc/window.snake.sc];
            });
            ot.push([dx,dy,d/sn.sp*2/sn.sc/window.snake.sc]);
            return ot;
        }).reduce(function(a, b){
            return a.concat(b);
        }, []).reduce(function(a, b){
            if (a === null) return b;
            if (b === null) return a;
            if(a[2] < b[2]) return a;
            return b;
        }, null);
        
        console.log("go away: " + JSON.stringify(go_away));
        console.log("attrack: " + JSON.stringify(attrack));
        
        if (go_away !== null && go_away[2] < 5000 * caref * window.snake.sc) {
            caref = 2;
            window.xm = -go_away[0];
            window.ym = -go_away[1];
            console.log("I am careful");
        } else if (attrack[2] > 5000) {
            window.xm = attrack[0];
            window.ym = attrack[1];
            console.log("I am hungry");
            caref = 1;
        }
    } ,100);
})();

// ==UserScript==
// @name Slither Bot
// @namespace http://slither.io/
// @Version 0.1
// @description try to take over the world!
// @author You
// @match http://slither.io/
// @grant none
// ==/UserScript==

(function() {
'use strict';
var caref = 1;
setInterval(function(){
if (window.snake === null) {
//window.want_play=true;
return;
}
var sx = window.snake.xx;
var sy = window.snake.yy;
var attrack = window.foods.map(function(food){
if (food === null) return null;
var fx = food.xx;
var fy = food.yy;
var dx = fx-sx;
var dy = fy-sy;
var d = dxdx+dydy;
return [dx, dy, d, food.sz];
}).reduce(function(a, b){
if (a === null) return b;
if (b === null) return a;
if (a[3] > 10 && b[3] < 10) return a;
if (a[3] < 10 && b[3] > 10) return b;
if(a[2] < b[2]) return a;
return b;
});

    var go_away = window.snakes.map(function(sn){
        if (sn === null) return [];
        if (sn.xx === sx && sn.yy === sy) return [];
        var ox = sn.xx;
        var oy = sn.yy;
        var dx = ox-sx;
        var dy = oy-sy;
        var d = dx*dx+dy*dy;
        var ot = sn.pts.map(function (pt){
            var dx = pt.xx-sx;
            var dy = pt.yy-sy;
            var d = dx*dx+dy*dy;
            return [dx, dy, d/sn.sc/window.snake.sc];
        });
        ot.push([dx,dy,d/sn.sp*2/sn.sc/window.snake.sc]);
        return ot;
    }).reduce(function(a, b){
        return a.concat(b);
    }, []).reduce(function(a, b){
        if (a === null) return b;
        if (b === null) return a;
        if(a[2] < b[2]) return a;
        return b;
    }, null);
    
    console.log("go away: " + JSON.stringify(go_away));
    console.log("attrack: " + JSON.stringify(attrack));
    
    if (go_away !== null && go_away[2] < 5000 * caref * window.snake.sc) {
        caref = 2;
        window.xm = -go_away[0];
        window.ym = -go_away[1];
        console.log("I am careful");
    } else if (attrack[2] > 5000) {
        window.xm = attrack[0];
        window.ym = attrack[1];
        console.log("I am hungry");
        caref = 1;
    }
} ,100);

})();