factor to nodejs application

static/js/player.js

@@ -0,0 +1,71 @@
+function Player(you) {
+    let pos = { x: Math.random() * 5000 - 50, y: Math.random() * 5000 - 50 };
+    let camera = { x: -pos.x, y: -pos.y };
+    let vel = { x: 0, y: 0 };
+
+    this.camera = camera;
+    this.pos = pos;
+    this.vel = vel;
+    this.rot = 0;
+    this.dir = 1;
+    this.ticks = 0;
+
+    this.health = 100;
+
+    this.you = you;
+}
+
+Player.prototype.bump = function () {
+    let player = this;
+
+    if (player.ticks < 10) {
+        player.dir *= -1;
+    }
+
+    player.vel.x *= 0.3;
+    player.vel.y *= 0.3;
+
+    player.vel.x += Math.sin(player.rot) * 12;
+    player.vel.y -= Math.cos(player.rot) * 12;
+
+    player.ticks = 0;
+}
+
+Player.prototype.handleTick = function(game) {
+    let { player } = game;
+
+    let ent = this;
+
+    ent.pos.x += ent.vel.x;
+    ent.pos.y += ent.vel.y;
+
+    ent.vel.x *= 0.9;
+    ent.vel.y *= 0.9;
+
+    ent.rot += 0.03 * ent.dir;
+    ent.rot = ent.rot % (Math.PI * 10);
+
+    ent.camera.x = -ent.pos.x * 0.1 + ent.camera.x * 0.9;
+    ent.camera.y = -ent.pos.y * 0.1 + ent.camera.y * 0.9;
+
+    ent.ticks++;
+
+    let dist = ((ent.pos.x - player.pos.x) ** 2) + ((ent.pos.y - player.pos.y) ** 2);
+
+    let dp = (Math.sin(ent.rot) * (ent.pos.x - player.pos.x))
+        - (Math.cos(ent.rot) * (ent.pos.y - player.pos.y));
+
+    dp /= dist;
+
+    dp *= 10;
+
+    if (ent.you) return;
+
+    if (Math.random() < -dp && Math.random() > 3 / (ent.ticks+2)) {
+        ent.bump();
+    }
+
+    if (Math.sqrt(dist) < 96 / 2) {
+        player.health --;
+    }
+}