perf: magic swords

resources/magic-swords/start.js

@@ -1,7 +1,5 @@
 const {Player, Position} = wielder;
 
-const shots = [];
-
 const EVERY = 0.03;
 const N = 14;
 const SPREAD = 1;
@@ -48,43 +46,47 @@ for (const id of await Promise.all(promises)) {
   creating.push(ecs.get(id));
 }
 
-const accumulated = {};
 const shot = creating.shift();
 shot.Sprite.alpha = 1;
-accumulated[shot.id] = 0;
-shots.push(shot)
+const shots = [
+  {
+    accumulated: 0,
+    entity: shot,
+  },
+];
 
 let spawner = 0;
 while (shots.length > 0) {
   spawner += elapsed;
   if (creating.length > 0 && spawner >= EVERY) {
-    const shot = creating.shift();
-    shot.Sprite.alpha = 1;
-    accumulated[shot.id] = 0;
-    shots.push(shot)
+    const entity = creating.shift();
+    entity.Sprite.alpha = 1;
+    shots.push({accumulated: 0, entity})
     spawner -= EVERY;
   }
   const destroying = [];
   for (const shot of shots) {
-    accumulated[shot.id] += elapsed;
-    if (accumulated[shot.id] <= SPREAD) {
-      shot.Speed.speed = 100 * (1 - (accumulated[shot.id] / SPREAD))
+    shot.accumulated += elapsed;
+    if (shot.accumulated <= SPREAD) {
+      shot.entity.Speed.speed = 100 * (1 - (shot.accumulated / SPREAD))
     }
     else {
-      const toward = Math.atan2(
-        where.y - shot.Position.y,
-        where.x - shot.Position.x,
-      )
-      shot.Speed.speed = 400;
-      shot.Direction.direction = (Math.TAU + toward) % Math.TAU;
-      if (accumulated[shot.id] > 1.5 || Math.distance(where, shot.Position) < 4) {
-        delete accumulated[shot.id];
-        shot.Sprite.alpha = 0;
-        ecs.destroy(shot.id);
+      if (!shot.oriented) {
+        const toward = Math.atan2(
+          where.y - shot.entity.Position.y,
+          where.x - shot.entity.Position.x,
+        )
+        shot.entity.Speed.speed = 400;
+        shot.entity.Direction.direction = (Math.TAU + toward) % Math.TAU;
+        shot.oriented = true;
+      }
+      if (shot.accumulated > 1.5) {
+        shot.entity.Sprite.alpha = 0;
+        ecs.destroy(shot.entity.id);
         destroying.push(shot);
       }
     }
-    shot.Controlled.directionMove(shot.Direction.direction);
+    shot.entity.Controlled.directionMove(shot.entity.Direction.direction);
   }
   for (let i = 0; i < destroying.length; ++i) {
     shots.splice(shots.indexOf(destroying[i]), 1);