refactor project structure, implement tessellator

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

@@ -0,0 +1,61 @@
+window.ChunkSection = class {
+
+    static get SIZE() {
+        return 16;
+    }
+
+    constructor(world, x, y, z) {
+        this.world = world;
+        this.x = x;
+        this.y = y;
+        this.z = z;
+
+        this.group = new THREE.Object3D();
+        this.dirty = true;
+
+        this.blocks = [];
+        for (let x = 0; x < ChunkSection.SIZE; x++) {
+            for (let y = 0; y < ChunkSection.SIZE; y++) {
+                for (let z = 0; z < ChunkSection.SIZE; z++) {
+                    this.setBlockAt(x, y, z, 0);
+                }
+            }
+        }
+    }
+
+    rebuild(renderer) {
+        this.dirty = false;
+        this.group.clear();
+
+
+        for (let x = 0; x < ChunkSection.SIZE; x++) {
+            for (let y = 0; y < ChunkSection.SIZE; y++) {
+                for (let z = 0; z < ChunkSection.SIZE; z++) {
+                    let typeId = this.getBlockAt(x, y, z);
+
+                    if (typeId !== 0) {
+                        let absoluteX = this.x * ChunkSection.SIZE + x;
+                        let absoluteY = this.y * ChunkSection.SIZE + y;
+                        let absoluteZ = this.z * ChunkSection.SIZE + z;
+
+                        renderer.blockRenderer.renderBlock(this.world, this.group, typeId, absoluteX, absoluteY, absoluteZ);
+                    }
+                }
+            }
+        }
+    }
+
+    getBlockAt(x, y, z) {
+        let index = y << 8 | z << 4 | x;
+        return this.blocks[index];
+    }
+
+    setBlockAt(x, y, z, typeId) {
+        let index = y << 8 | z << 4 | x;
+        this.blocks[index] = typeId;
+    }
+
+    queueForRebuild() {
+        this.dirty = true;
+    }
+}