refactor project structure, implement tessellator

src/js/net/minecraft/client/world/Chunk.js

@@ -0,0 +1,36 @@
+window.Chunk = class {
+
+    constructor(world, x, z) {
+        this.world = world;
+        this.x = x;
+        this.z = z;
+
+        this.group = new THREE.Object3D();
+
+        // Initialize sections
+        this.sections = [];
+        for (let y = 0; y < 16; y++) {
+            let section = new ChunkSection(world, x, y, z);
+
+            this.sections[y] = section;
+            this.group.add(section.group);
+        }
+    }
+
+    getSection(y) {
+        return this.sections[y];
+    }
+
+    rebuild(renderer) {
+        for (let y = 0; y < this.sections.length; y++) {
+            this.sections[y].rebuild(renderer);
+        }
+    }
+
+    queueForRebuild() {
+        for (let y = 0; y < this.sections.length; y++) {
+            this.sections[y].queueForRebuild();
+        }
+    }
+
+}