VoxelGrid and VoxelManager

.gitignore

@@ -1 +1,2 @@
-/node_modules
+/node_modules
+/dist

build.js

@@ -0,0 +1,25 @@
+import { build } from 'esbuild';
+import { copyFileSync, mkdirSync } from 'fs';
+import { dirname } from 'path';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+
+// Ensure dist directory exists
+mkdirSync('dist', { recursive: true });
+
+// Build JavaScript
+await build({
+  entryPoints: ['src/game-viewport.js'],
+  bundle: true,
+  format: 'esm',
+  outfile: 'dist/game-viewport.js',
+  platform: 'browser',
+});
+
+// Copy HTML file
+copyFileSync('src/index.html', 'dist/index.html');
+
+console.log('Build complete!');
+

package.json

@@ -5,9 +5,10 @@
   "type": "module",
   "main": "index.js",
   "scripts": {
-    "start": "web-dev-server --node-resolve --watch --root-dir src",
-    "test": "web-test-runner \"test/**/*.test.js\" --node-resolve",
-    "test:watch": "web-test-runner \"test/**/*.test.js\" --node-resolve --watch"
+    "build": "node build.js",
+    "start": "web-dev-server --node-resolve --watch --root-dir dist",
+    "test": "web-test-runner \"test/**/*.test.js\" --node-resolve --puppeteer",
+    "test:watch": "web-test-runner \"test/**/*.test.js\" --node-resolve --watch --puppeteer"
   },
   "repository": {
     "type": "git",
@@ -18,11 +19,14 @@
   "license": "ISC",
   "devDependencies": {
     "@esm-bundle/chai": "^4.3.4-fix.0",
-    "@web/test-runner": "^0.20.2",
     "@web/dev-server": "^0.4.6",
+    "@web/test-runner": "^0.20.2",
+    "@web/test-runner-puppeteer": "^0.18.0",
+    "esbuild": "^0.27.1",
     "sinon": "^21.0.0"
   },
   "dependencies": {
+    "lit": "^3.3.1",
     "three": "^0.182.0"
   }
 }

src/game-viewport.js

@@ -1,12 +1,10 @@
-import {
-  LitElement,
-  html,
-  css,
-} from "https://cdn.jsdelivr.net/gh/lit/dist@3/core/lit-core.min.js";
-import * as THREE from "https://cdn.jsdelivr.net/npm/three@0.182.0/build/three.module.js";
+import { LitElement, html, css } from "lit";
+import * as THREE from "three";
+import { OrbitControls } from "three/addons/controls/OrbitControls.js";
+import { VoxelGrid } from "./grid/VoxelGrid.js";
+import { VoxelManager } from "./grid/VoxelManager.js";
 
-// --- 1. Define the Game Viewport Component using Lit ---
-class GameViewport extends LitElement {
+export class GameViewport extends LitElement {
   static styles = css`
     :host {
       display: block;
@@ -14,66 +12,114 @@ class GameViewport extends LitElement {
       height: 100%;
       overflow: hidden;
     }
-    canvas {
-      display: block;
+    #canvas-container {
       width: 100%;
       height: 100%;
     }
   `;
 
+  constructor() {
+    super();
+    this.scene = null;
+    this.camera = null;
+    this.renderer = null;
+    this.voxelGrid = null;
+    this.voxelManager = null;
+  }
+
   firstUpdated() {
-    // Initialize Three.js scene after the component renders
     this.initThreeJS();
+    this.initGameWorld();
+    this.animate();
   }
 
   initThreeJS() {
     const container = this.shadowRoot.getElementById("canvas-container");
-    const scene = new THREE.Scene();
-    scene.background = new THREE.Color(0x0a0b10); // Void Black
 
-    const camera = new THREE.PerspectiveCamera(
-      75,
+    // Scene Setup
+    this.scene = new THREE.Scene();
+    this.scene.background = new THREE.Color(0x0a0b10);
+
+    // Lighting (Essential for LambertMaterial)
+    const ambientLight = new THREE.AmbientLight(0x404040, 1.5); // Soft white light
+    this.scene.add(ambientLight);
+    const dirLight = new THREE.DirectionalLight(0xffffff, 1);
+    dirLight.position.set(10, 20, 10);
+    this.scene.add(dirLight);
+
+    // Camera
+    this.camera = new THREE.PerspectiveCamera(
+      45,
       window.innerWidth / window.innerHeight,
       0.1,
       1000
     );
-    const renderer = new THREE.WebGLRenderer({ antialias: true }); // Enable AA for smoother edges
+    this.camera.position.set(20, 20, 20);
+    this.camera.lookAt(0, 0, 0);
 
-    // Set initial size
-    renderer.setSize(window.innerWidth, window.innerHeight);
-    container.appendChild(renderer.domElement);
+    // Renderer
+    this.renderer = new THREE.WebGLRenderer({ antialias: true });
+    this.renderer.setSize(window.innerWidth, window.innerHeight);
+    this.renderer.setPixelRatio(window.devicePixelRatio);
+    container.appendChild(this.renderer.domElement);
 
-    // Add a rotating Voxel (Cube)
-    const geometry = new THREE.BoxGeometry();
-    const material = new THREE.MeshBasicMaterial({
-      color: 0x00f0ff,
-      wireframe: true,
-    });
-    const cube = new THREE.Mesh(geometry, material);
-    scene.add(cube);
-
-    camera.position.z = 5;
-
-    const animate = () => {
-      requestAnimationFrame(animate);
-      cube.rotation.x += 0.01;
-      cube.rotation.y += 0.01;
-      renderer.render(scene, camera);
-    };
-    animate();
+    // Controls
+    this.controls = new OrbitControls(this.camera, this.renderer.domElement);
+    this.controls.enableDamping = true;
 
     // Handle Resize
-    window.addEventListener("resize", () => {
-      camera.aspect = window.innerWidth / window.innerHeight;
-      camera.updateProjectionMatrix();
-      renderer.setSize(window.innerWidth, window.innerHeight);
-    });
+    window.addEventListener("resize", this.onWindowResize.bind(this));
+  }
+
+  initGameWorld() {
+    // 1. Create Data Grid
+    this.voxelGrid = new VoxelGrid(16, 8, 16);
+
+    // 2. Generate Test Terrain (Simple Flat Floor + Random Pillars)
+    for (let x = 0; x < 16; x++) {
+      for (let z = 0; z < 16; z++) {
+        // Base Floor (Stone)
+        this.voxelGrid.setVoxel(x, 0, z, 1);
+
+        // Random Details (Dirt/Grass)
+        if (Math.random() > 0.8) {
+          this.voxelGrid.setVoxel(x, 1, z, 2); // Dirt Mound
+        }
+
+        // Aether Crystal Pillar
+        if (x === 8 && z === 8) {
+          this.voxelGrid.setVoxel(x, 1, z, 4);
+          this.voxelGrid.setVoxel(x, 2, z, 4);
+          this.voxelGrid.setVoxel(x, 3, z, 4);
+        }
+      }
+    }
+
+    // 3. Initialize Visual Manager
+    this.voxelManager = new VoxelManager(this.voxelGrid, this.scene);
+  }
+
+  animate() {
+    requestAnimationFrame(this.animate.bind(this));
+
+    this.controls.update();
+
+    // Update Voxels if dirty
+    if (this.voxelManager) this.voxelManager.update();
+
+    this.renderer.render(this.scene, this.camera);
+  }
+
+  onWindowResize() {
+    if (!this.camera || !this.renderer) return;
+    this.camera.aspect = window.innerWidth / window.innerHeight;
+    this.camera.updateProjectionMatrix();
+    this.renderer.setSize(window.innerWidth, window.innerHeight);
   }
 
   render() {
-    return html` <div id="canvas-container"></div> `;
+    return html`<div id="canvas-container"></div>`;
   }
 }
 
-// Register the web component
 customElements.define("game-viewport", GameViewport);

src/grid/VoxelGrid.js

@@ -0,0 +1,72 @@
+/**
+ * VoxelGrid.js
+ * The pure data representation of the game world.
+ * Uses a flat Uint8Array for high-performance memory access.
+ */
+export class VoxelGrid {
+  constructor(width, height, depth) {
+    this.width = width;
+    this.height = height;
+    this.depth = depth;
+
+    // 0 = Air, 1+ = Solid Blocks
+    this.cells = new Uint8Array(width * height * depth);
+    this.dirty = true; // Flag to tell Renderer to update
+  }
+
+  /**
+   * Converts 3D coordinates to a flat array index.
+   */
+  getIndex(x, y, z) {
+    return y * this.width * this.depth + z * this.width + x;
+  }
+
+  /**
+   * Checks if coordinates are inside the grid dimensions.
+   */
+  isValidBounds(x, y, z) {
+    return (
+      x >= 0 &&
+      x < this.width &&
+      y >= 0 &&
+      y < this.height &&
+      z >= 0 &&
+      z < this.depth
+    );
+  }
+
+  /**
+   * Sets a voxel ID at the specified position.
+   * @param {number} x
+   * @param {number} y
+   * @param {number} z
+   * @param {number} typeId - 0 for Air, integers for material types
+   */
+  setVoxel(x, y, z, typeId) {
+    if (!this.isValidBounds(x, y, z)) return;
+
+    const index = this.getIndex(x, y, z);
+
+    // Only update if changed to save render cycles
+    if (this.cells[index] !== typeId) {
+      this.cells[index] = typeId;
+      this.dirty = true;
+    }
+  }
+
+  /**
+   * Gets the voxel ID at the specified position.
+   * Returns 0 (Air) if out of bounds.
+   */
+  getVoxel(x, y, z) {
+    if (!this.isValidBounds(x, y, z)) return 0;
+    return this.cells[this.getIndex(x, y, z)];
+  }
+
+  /**
+   * Helper: Checks if a voxel is solid (non-air).
+   */
+  isSolid(x, y, z) {
+    return this.getVoxel(x, y, z) !== 0;
+  }
+}

src/grid/VoxelManager.js

@@ -0,0 +1,92 @@
+import * as THREE from "three";
+
+/**
+ * VoxelManager.js
+ * Handles the Three.js rendering of the VoxelGrid.
+ * Uses InstancedMesh for performance (1 draw call for 10,000 blocks).
+ */
+export class VoxelManager {
+  constructor(grid, scene) {
+    this.grid = grid;
+    this.scene = scene;
+    this.mesh = null;
+
+    // Define Material Palette (ID -> Color)
+    this.palette = [
+      null, // 0: Air (Invisible)
+      new THREE.Color(0x888888), // 1: Stone (Grey)
+      new THREE.Color(0x8b4513), // 2: Dirt (Brown)
+      new THREE.Color(0x228b22), // 3: Grass (Green)
+      new THREE.Color(0x00f0ff), // 4: Aether Crystal (Cyan)
+    ];
+
+    this.init();
+  }
+
+  init() {
+    // Create geometry once
+    const geometry = new THREE.BoxGeometry(1, 1, 1);
+
+    // Basic material allows for coloring individual instances
+    const material = new THREE.MeshLambertMaterial({ color: 0xffffff });
+
+    // Calculate max capacity based on grid size
+    const count = this.grid.width * this.grid.height * this.grid.depth;
+
+    // Create the InstancedMesh
+    this.mesh = new THREE.InstancedMesh(geometry, material, count);
+    this.mesh.instanceMatrix.setUsage(THREE.DynamicDrawUsage);
+
+    // Add to scene
+    this.scene.add(this.mesh);
+  }
+
+  /**
+   * Rebuilds the visual mesh based on the grid data.
+   * Call this in the game loop if grid.dirty is true.
+   */
+  update() {
+    if (!this.grid.dirty) return;
+
+    let instanceId = 0;
+    const dummy = new THREE.Object3D();
+
+    for (let y = 0; y < this.grid.height; y++) {
+      for (let z = 0; z < this.grid.depth; z++) {
+        for (let x = 0; x < this.grid.width; x++) {
+          const typeId = this.grid.getVoxel(x, y, z);
+
+          if (typeId !== 0) {
+            // Position the dummy object
+            dummy.position.set(x, y, z);
+            dummy.updateMatrix();
+
+            // Update the instance matrix
+            this.mesh.setMatrixAt(instanceId, dummy.matrix);
+
+            // Update the instance color based on ID
+            const color = this.palette[typeId] || new THREE.Color(0xff00ff); // Magenta = Error
+            this.mesh.setColorAt(instanceId, color);
+
+            instanceId++;
+          }
+        }
+      }
+    }
+
+    // Hide unused instances by scaling them to zero (or moving them to infinity)
+    // For simplicity in this prototype, we define count as max possible,
+    // but in production, we would manage the count property more dynamically.
+    this.mesh.count = instanceId;
+
+    this.mesh.instanceMatrix.needsUpdate = true;
+
+    // instanceColor is lazy-created by Three.js only when setColorAt is called.
+    // If the grid is empty, instanceColor might be null.
+    if (this.mesh.instanceColor) {
+      this.mesh.instanceColor.needsUpdate = true;
+    }
+
+    this.grid.dirty = false;
+  }
+}

src/index.html

@@ -13,17 +13,6 @@
       rel="stylesheet"
     />
 
-    <!-- IMPORT MAP: Defines module locations -->
-    <script type="importmap">
-      {
-        "imports": {
-          "three": "https://cdn.jsdelivr.net/npm/three@0.160.0/build/three.module.js",
-          "three/addons/": "https://cdn.jsdelivr.net/npm/three@0.160.0/examples/jsm/",
-          "lit": "https://cdn.jsdelivr.net/gh/lit/dist@3/core/lit-core.min.js"
-        }
-      }
-    </script>
-
     <style>
       :root {
         /* Palette Definition */

test/grid/VoxelGrid.test.js

@@ -0,0 +1,96 @@
+import { expect } from "@esm-bundle/chai";
+import { VoxelGrid } from "../../src/grid/VoxelGrid.js";
+
+describe("Phase 1: VoxelGrid Data Structure", () => {
+  let grid;
+  const width = 10;
+  const height = 10;
+  const depth = 10;
+
+  beforeEach(() => {
+    grid = new VoxelGrid(width, height, depth);
+  });
+
+  it("CoA 1: Should initialize with correct dimensions and empty cells", () => {
+    expect(grid.width).to.equal(width);
+    expect(grid.height).to.equal(height);
+    expect(grid.depth).to.equal(depth);
+    expect(grid.cells).to.be.instanceOf(Uint8Array);
+    expect(grid.cells.length).to.equal(width * height * depth);
+
+    // Verify all are 0 (Air)
+    const isAllZero = grid.cells.every((val) => val === 0);
+    expect(isAllZero).to.be.true;
+  });
+
+  it("CoA 2: Should correctly validate bounds", () => {
+    // Inside bounds
+    expect(grid.isValidBounds(0, 0, 0)).to.be.true;
+    expect(grid.isValidBounds(5, 5, 5)).to.be.true;
+    expect(grid.isValidBounds(width - 1, height - 1, depth - 1)).to.be.true;
+
+    // Outside bounds (Negative)
+    expect(grid.isValidBounds(-1, 0, 0)).to.be.false;
+    expect(grid.isValidBounds(0, -1, 0)).to.be.false;
+    expect(grid.isValidBounds(0, 0, -1)).to.be.false;
+
+    // Outside bounds (Overflow)
+    expect(grid.isValidBounds(width, 0, 0)).to.be.false;
+    expect(grid.isValidBounds(0, height, 0)).to.be.false;
+    expect(grid.isValidBounds(0, 0, depth)).to.be.false;
+  });
+
+  it("CoA 3: Should store and retrieve voxel IDs", () => {
+    const x = 2,
+      y = 3,
+      z = 4;
+    const typeId = 5; // Arbitrary material ID
+
+    grid.setVoxel(x, y, z, typeId);
+
+    const result = grid.getVoxel(x, y, z);
+    expect(result).to.equal(typeId);
+  });
+
+  it("CoA 4: Should return 0 (Air) for out-of-bounds getVoxel", () => {
+    expect(grid.getVoxel(-5, 0, 0)).to.equal(0);
+    expect(grid.getVoxel(100, 100, 100)).to.equal(0);
+  });
+
+  it("CoA 5: Should handle isSolid checks", () => {
+    grid.setVoxel(1, 1, 1, 1); // Solid
+    grid.setVoxel(2, 2, 2, 0); // Air
+
+    expect(grid.isSolid(1, 1, 1)).to.be.true;
+    expect(grid.isSolid(2, 2, 2)).to.be.false;
+    expect(grid.isSolid(-1, -1, -1)).to.be.false; // Out of bounds is not solid
+  });
+
+  it("CoA 6: Should manage the dirty flag correctly", () => {
+    // Initial state
+    expect(grid.dirty).to.be.true;
+
+    // Reset flag manually (simulating a render cycle completion)
+    grid.dirty = false;
+
+    // Set voxel to SAME value
+    grid.setVoxel(0, 0, 0, 0);
+    expect(grid.dirty).to.be.false; // Should not dirty if value didn't change
+
+    // Set voxel to NEW value
+    grid.setVoxel(0, 0, 0, 1);
+    expect(grid.dirty).to.be.true; // Should be dirty now
+  });
+
+  it("CoA 7: Should calculate flat array index correctly", () => {
+    // Based on logic: (y * width * depth) + (z * width) + x
+    // x=1, y=0, z=0 -> 1
+    expect(grid.getIndex(1, 0, 0)).to.equal(1);
+
+    // x=0, y=0, z=1 -> 1 * 10 = 10
+    expect(grid.getIndex(0, 0, 1)).to.equal(10);
+
+    // x=0, y=1, z=0 -> 1 * 10 * 10 = 100
+    expect(grid.getIndex(0, 1, 0)).to.equal(100);
+  });
+});

test/grid/VoxelManager.test.js

@@ -0,0 +1,124 @@
+import { expect } from "@esm-bundle/chai";
+import * as THREE from "three";
+import sinon from "sinon";
+import { VoxelManager } from "../../src/grid/VoxelManager.js";
+import { VoxelGrid } from "../../src/grid/VoxelGrid.js";
+
+describe("Phase 1: VoxelManager (Renderer)", () => {
+  let grid;
+  let scene;
+  let manager;
+
+  beforeEach(() => {
+    // Setup a basic scene and grid
+    scene = new THREE.Scene();
+    grid = new VoxelGrid(4, 4, 4); // Small 4x4x4 grid
+    manager = new VoxelManager(grid, scene);
+  });
+
+  it("CoA 1: Should initialize and add InstancedMesh to the scene", () => {
+    // Check if something was added to the scene
+    expect(scene.children.length).to.equal(1);
+
+    const mesh = scene.children[0];
+    expect(mesh).to.be.instanceOf(THREE.InstancedMesh);
+
+    // Max capacity should match grid size
+    expect(mesh.count).to.equal(4 * 4 * 4);
+  });
+
+  it("CoA 2: Should update visual instances based on grid data", () => {
+    // 1. Setup Data: Place 3 voxels
+    grid.setVoxel(0, 0, 0, 1); // Stone
+    grid.setVoxel(1, 0, 0, 2); // Dirt
+    grid.setVoxel(0, 1, 0, 3); // Grass
+
+    // 2. Act: Trigger Update
+    // (VoxelGrid sets dirty=true automatically on setVoxel)
+    manager.update();
+
+    // 3. Assert: Mesh count should represent only ACTIVE voxels
+    // Note: In the implementation, we update `mesh.count` to the number of visible instances
+    const mesh = manager.mesh;
+    expect(mesh.count).to.equal(3);
+  });
+
+  it("CoA 3: Should respect the Dirty Flag (Performance)", () => {
+    // Setup: Add a voxel so instanceColor buffer is initialized by Three.js
+    grid.setVoxel(0, 0, 0, 1);
+
+    const mesh = manager.mesh;
+
+    // 1. First Update (Dirty is true by default)
+    manager.update();
+    expect(grid.dirty).to.be.false;
+
+    // Capture current versions. Three.js increments these when needsUpdate = true.
+    const matrixVersion = mesh.instanceMatrix.version;
+    // instanceColor might be null if no color set logic ran, but manager.update() ensures it if voxels exist.
+    const colorVersion = mesh.instanceColor ? mesh.instanceColor.version : -1;
+
+    // 2. Call Update again (Dirty is false)
+    manager.update();
+
+    // 3. Assert: Versions should NOT have incremented
+    expect(mesh.instanceMatrix.version).to.equal(matrixVersion);
+    if (mesh.instanceColor) {
+      expect(mesh.instanceColor.version).to.equal(colorVersion);
+    }
+
+    // 4. Change data -> Dirty becomes true
+    grid.setVoxel(3, 3, 3, 1);
+    expect(grid.dirty).to.be.true;
+
+    // 5. Update again
+    manager.update();
+
+    // 6. Assert: Versions SHOULD increment
+    expect(mesh.instanceMatrix.version).to.be.greaterThan(matrixVersion);
+    if (mesh.instanceColor) {
+      expect(mesh.instanceColor.version).to.be.greaterThan(colorVersion);
+    }
+  });
+
+  it("CoA 4: Should apply correct colors from palette", () => {
+    // ID 4 is Cyan (Aether Crystal) based on Manager code
+    grid.setVoxel(0, 0, 0, 4);
+    manager.update();
+
+    const mesh = manager.mesh;
+    const color = new THREE.Color();
+
+    // Get color of the first instance (index 0)
+    mesh.getColorAt(0, color);
+
+    // Check against the palette definition in VoxelManager
+    const expectedColor = new THREE.Color(0x00f0ff); // Cyan
+
+    expect(color.r).to.be.closeTo(expectedColor.r, 0.01);
+    expect(color.g).to.be.closeTo(expectedColor.g, 0.01);
+    expect(color.b).to.be.closeTo(expectedColor.b, 0.01);
+  });
+
+  it("CoA 5: Should position instances correctly in 3D space", () => {
+    const targetX = 2;
+    const targetY = 3;
+    const targetZ = 1;
+
+    grid.setVoxel(targetX, targetY, targetZ, 1);
+    manager.update();
+
+    const mesh = manager.mesh;
+    const matrix = new THREE.Matrix4();
+
+    // Get matrix of first instance
+    mesh.getMatrixAt(0, matrix);
+
+    const position = new THREE.Vector3();
+    position.setFromMatrixPosition(matrix);
+
+    expect(position.x).to.equal(targetX);
+    expect(position.y).to.equal(targetY);
+    expect(position.z).to.equal(targetZ);
+  });
+});