Updated Vector3

+Added various Vector3 methods - divide (by scalar), length, lengthSq, normalize

src/model/vector3.js

@@ -77,6 +77,14 @@ export default class Vector3 {
         );
     }
 
+    divide(scalar) {
+        return new Vector3(
+            this.x / scalar,
+            this.y / scalar,
+            this.z / scalar
+        );
+    }
+
     lerp(other, t) {
         return new Vector3(
             this.x + (other.x - this.x) * t,
@@ -137,6 +145,25 @@ export default class Vector3 {
         return localPos.rotate(parentRot.negate());
     }
 
+    length() {
+        return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);
+    }
+    
+    lengthSq() {
+        return this.x * this.x + this.y * this.y + this.z * this.z;
+    }
+
+    normalize() {
+        const len = this.length();
+        if (len === 0) return new Vector3(0, 0, 0);
+
+        return new Vector3(
+            this.x / len,
+            this.y / len,
+            this.z / len
+        );
+    }
+
     negate() {
         return new Vector3(-this.x, -this.y, -this.z);
     }