add client side terrain without collision

src/entity.js

@@ -1,4 +1,4 @@
-import * as THREE from 'three'
+import { Vector2 } from 'three'
 import SAT from 'sat'
 import SATX from './satx.js'
 
@@ -7,7 +7,7 @@ export default class Entity {
   speed = 400
   radius = 0
 
-  #position = new THREE.Vector2(0, 0)
+  #position = new Vector2()
   #dest = null
   #game = null
 
@@ -40,7 +40,7 @@ export default class Entity {
   }
 
   moveAction(x, y) {
-    this.#dest = new THREE.Vector3(x, y, 0)
+    this.#dest = new Vector2(x, y)
   }
 
   state() {
@@ -60,7 +60,7 @@ export default class Entity {
   takeStep() {
     const speed = this.speed / (this.game?.tickBudget ?? 1000)
     if (this.#dest != null) {
-      const fixedDest = new THREE.Vector2(
+      const fixedDest = new Vector2(
         Math.min(Math.max(this.radius, this.#dest.x), (this.game?.width ?? Infinity) - this.radius),
         Math.min(Math.max(this.radius, this.#dest.y), (this.game?.height ?? Infinity) - this.radius),
       )