Refactored the WHOLE project

From a simple test file, we're now on road to create a real project
Took 3 hours, but code looks nice

src/utils/addAssetsOnScene.js

@@ -0,0 +1,37 @@
+import * as THREE from 'three';
+import * as MathUtils from 'three/src/math/MathUtils.js';
+import { createGround } from '../objects/ground.js';
+import {loadModel} from './import.js';
+
+
+function alignGround(ground, MovingObject){
+    /*Function used to place an object on top of another object. In fact, this is used only to place correctly objects on the ground*/
+    const boundingBoxGround = new THREE.Box3().setFromObject(ground);
+    const boundingBoxMovingObject = new THREE.Box3().setFromObject(MovingObject);
+
+    const MovingObjectHeight = boundingBoxMovingObject.max.z - boundingBoxMovingObject.min.z;
+    MovingObject.position.y = MovingObjectHeight/2 + boundingBoxGround.max.z;
+}
+
+export async function addAssetsOnScene(scene){
+    /*This function takes the scene as arg, and is used to load everything needed on the terrain.
+    Player, trees, fences, and everything displayed on the screen is added by this function, at the right place
+    
+    Will return an object containing created objects*/
+
+    scene.add(new THREE.AmbientLight(0x404040, 50));//Light, required to see
+
+    const ground = createGround();
+    scene.add(ground);
+
+    const player = await loadModel('src/objects/models/player.gltf');//Loading player
+    player.scene.scale.set(0.2,0.2,0.2);
+    alignGround(ground, player.scene);
+    player.scene.rotateOnWorldAxis(new THREE.Vector3(1,0,0), MathUtils.degToRad(90));//Must be standing up
+    scene.add( player.scene );
+	
+    return {
+        ground: ground,
+        player: player,
+    };
+}