optimizations, NPC movement fixes again

common/game_basic.js

@@ -16,9 +16,12 @@ class GameBasic {
     }
     main() {
         let { entities } = this;
+        let that = this;
 
         for (let ent of entities) {
-            ent.handleTick(this);
+            (async function() {
+                ent.handleTick(that)
+            })();
         }
     }
     init() {

common/npc.js

@@ -14,34 +14,35 @@ class NPC {
 
         this.immortal = true;
 
-        this.posOff = { x: 0, y: 0 };
-
         this.serverProps = [
-            'type', 'pos', 'vel', 'you', 'immortal', 'posOff'
+            'type', 'pos', 'vel', 'you', 'immortal', 'destX', 'destY', 'ticks', 'rFac'
         ];
+
+        this.ticks = 601;
+        this.rFac = Math.random() * 100;
+
+        this.destX = 0;
+        this.destY = 0;
     }
     handleTick(game) {
-        let { entities } = game;
+        this.ticks++;
 
-        let rEntity, i = 0;
-
-        while ((!rEntity || rEntity.type != 'Player' || rEntity.health <= 0) && i < 100) {
-            rEntity = entities[Math.floor(Math.random() * entities.length)];
-            i++;
+        if (this.ticks >= this.rFac * 10) {
+            this.ticks = 0;
+            this.rFac = (this.rFac * 2385 + 293) % 100;
+            
+            this.destX = Math.sin(this.rFac) * ((this.rFac / 100) ** 4) * game.width;
+            this.destY = Math.cos(this.rFac) * ((this.rFac / 100) ** 4) *  game.height;
         }
 
-        let jitter = entities.filter(x => x.type == 'Player' && x && x.health > 0).length;
+        let distX = (this.destX - this.pos.x);
+        let distY = (this.destY - this.pos.y)
 
-        if (Math.random() < 0.01) {
-            this.posOff.x = (Math.random() * 50 - 25) * jitter;
-            this.posOff.y = (Math.random() * 50 - 25) * jitter;
-        }
+        this.vel.x += (distX + distY * this.rFac / 1000) * 0.001;
+        this.vel.y += (distY - distX * this.rFac / 1000) * 0.001;
 
-        this.vel.x += (rEntity.pos.x - this.pos.x + this.posOff.x) * 0.0002;
-        this.vel.y += (rEntity.pos.y - this.pos.y + this.posOff.y) * 0.0002;
-
-        this.vel.x *= 0.995;
-        this.vel.y *= 0.995;
+        this.vel.x *= 0.8;
+        this.vel.y *= 0.8;
 
         this.pos.x += this.vel.x;
         this.pos.y += this.vel.y;

game.js

@@ -64,7 +64,7 @@ class Game extends GameBasic {
         let that = this;
         that.entities = [];
 
-        for (let i = 0; i < 10; i++) {
+        for (let i = 0; i < 20; i++) {
             that.entities.push(new NPC())
         }