Reorganize: Move all skills to skills/ folder

- Created skills/ directory - Moved 272 skills to skills/ subfolder - Kept agents/ at root level - Kept installation scripts and docs at root level Repository structure: - skills/ - All 272 skills from skills.sh - agents/ - Agent definitions - *.sh, *.ps1 - Installation scripts - README.md, etc. - Documentation Co-Authored-By: Claude <noreply@anthropic.com>
2026-01-23 18:05:17 +00:00
parent 2b4e974878
commit b723e2bd7d
4083 changed files with 1056 additions and 1098063 deletions
--- a/skills/threejs-loaders/skill.md
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+---
+name: threejs-loaders
+description: Three.js asset loading - GLTF, textures, images, models, async patterns. Use when loading 3D models, textures, HDR environments, or managing loading progress.
+---
+
+# Three.js Loaders
+
+## Quick Start
+
+```javascript
+import * as THREE from "three";
+import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
+
+// Load GLTF model
+const loader = new GLTFLoader();
+loader.load("model.glb", (gltf) => {
+  scene.add(gltf.scene);
+});
+
+// Load texture
+const textureLoader = new THREE.TextureLoader();
+const texture = textureLoader.load("texture.jpg");
+```
+
+## LoadingManager
+
+Coordinate multiple loaders and track progress.
+
+```javascript
+const manager = new THREE.LoadingManager();
+
+// Callbacks
+manager.onStart = (url, loaded, total) => {
+  console.log(`Started loading: ${url}`);
+};
+
+manager.onLoad = () => {
+  console.log("All assets loaded!");
+  startGame();
+};
+
+manager.onProgress = (url, loaded, total) => {
+  const progress = (loaded / total) * 100;
+  console.log(`Loading: ${progress.toFixed(1)}%`);
+  updateProgressBar(progress);
+};
+
+manager.onError = (url) => {
+  console.error(`Error loading: ${url}`);
+};
+
+// Use manager with loaders
+const textureLoader = new THREE.TextureLoader(manager);
+const gltfLoader = new GLTFLoader(manager);
+
+// Load assets
+textureLoader.load("texture1.jpg");
+textureLoader.load("texture2.jpg");
+gltfLoader.load("model.glb");
+// onLoad fires when ALL are complete
+```
+
+## Texture Loading
+
+### TextureLoader
+
+```javascript
+const loader = new THREE.TextureLoader();
+
+// Callback style
+loader.load(
+  "texture.jpg",
+  (texture) => {
+    // onLoad
+    material.map = texture;
+    material.needsUpdate = true;
+  },
+  undefined, // onProgress - not supported for image loading
+  (error) => {
+    // onError
+    console.error("Error loading texture", error);
+  },
+);
+
+// Synchronous (returns texture, loads async)
+const texture = loader.load("texture.jpg");
+material.map = texture;
+```
+
+### Texture Configuration
+
+```javascript
+const texture = loader.load("texture.jpg", (tex) => {
+  // Color space (important for color accuracy)
+  tex.colorSpace = THREE.SRGBColorSpace; // For color/albedo maps
+  // tex.colorSpace = THREE.LinearSRGBColorSpace;  // For data maps (normal, roughness)
+
+  // Wrapping
+  tex.wrapS = THREE.RepeatWrapping;
+  tex.wrapT = THREE.RepeatWrapping;
+  // ClampToEdgeWrapping, RepeatWrapping, MirroredRepeatWrapping
+
+  // Repeat/offset
+  tex.repeat.set(2, 2);
+  tex.offset.set(0.5, 0.5);
+  tex.rotation = Math.PI / 4;
+  tex.center.set(0.5, 0.5);
+
+  // Filtering
+  tex.minFilter = THREE.LinearMipmapLinearFilter; // Default
+  tex.magFilter = THREE.LinearFilter; // Default
+  // NearestFilter - pixelated
+  // LinearFilter - smooth
+  // LinearMipmapLinearFilter - smooth with mipmaps
+
+  // Anisotropic filtering (sharper at angles)
+  tex.anisotropy = renderer.capabilities.getMaxAnisotropy();
+
+  // Flip Y (usually true for standard textures)
+  tex.flipY = true;
+
+  tex.needsUpdate = true;
+});
+```
+
+### CubeTextureLoader
+
+For environment maps and skyboxes.
+
+```javascript
+const loader = new THREE.CubeTextureLoader();
+
+// Load 6 faces
+const cubeTexture = loader.load([
+  "px.jpg",
+  "nx.jpg", // positive/negative X
+  "py.jpg",
+  "ny.jpg", // positive/negative Y
+  "pz.jpg",
+  "nz.jpg", // positive/negative Z
+]);
+
+// Use as background
+scene.background = cubeTexture;
+
+// Use as environment map
+scene.environment = cubeTexture;
+material.envMap = cubeTexture;
+```
+
+### HDR/EXR Loading
+
+```javascript
+import { RGBELoader } from "three/addons/loaders/RGBELoader.js";
+import { EXRLoader } from "three/addons/loaders/EXRLoader.js";
+
+// HDR
+const rgbeLoader = new RGBELoader();
+rgbeLoader.load("environment.hdr", (texture) => {
+  texture.mapping = THREE.EquirectangularReflectionMapping;
+  scene.environment = texture;
+  scene.background = texture;
+});
+
+// EXR
+const exrLoader = new EXRLoader();
+exrLoader.load("environment.exr", (texture) => {
+  texture.mapping = THREE.EquirectangularReflectionMapping;
+  scene.environment = texture;
+});
+```
+
+### PMREMGenerator
+
+Generate prefiltered environment maps for PBR.
+
+```javascript
+import { RGBELoader } from "three/addons/loaders/RGBELoader.js";
+
+const pmremGenerator = new THREE.PMREMGenerator(renderer);
+pmremGenerator.compileEquirectangularShader();
+
+new RGBELoader().load("environment.hdr", (texture) => {
+  const envMap = pmremGenerator.fromEquirectangular(texture).texture;
+
+  scene.environment = envMap;
+  scene.background = envMap;
+
+  texture.dispose();
+  pmremGenerator.dispose();
+});
+```
+
+## GLTF/GLB Loading
+
+The most common 3D format for web.
+
+```javascript
+import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
+
+const loader = new GLTFLoader();
+
+loader.load("model.glb", (gltf) => {
+  // The loaded scene
+  const model = gltf.scene;
+  scene.add(model);
+
+  // Animations
+  const animations = gltf.animations;
+  if (animations.length > 0) {
+    const mixer = new THREE.AnimationMixer(model);
+    animations.forEach((clip) => {
+      mixer.clipAction(clip).play();
+    });
+  }
+
+  // Cameras (if any)
+  const cameras = gltf.cameras;
+
+  // Asset info
+  console.log(gltf.asset); // Version, generator, etc.
+
+  // User data from Blender/etc
+  console.log(gltf.userData);
+});
+```
+
+### GLTF with Draco Compression
+
+```javascript
+import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
+import { DRACOLoader } from "three/addons/loaders/DRACOLoader.js";
+
+const dracoLoader = new DRACOLoader();
+dracoLoader.setDecoderPath(
+  "https://www.gstatic.com/draco/versioned/decoders/1.5.6/",
+);
+dracoLoader.preload();
+
+const gltfLoader = new GLTFLoader();
+gltfLoader.setDRACOLoader(dracoLoader);
+
+gltfLoader.load("compressed-model.glb", (gltf) => {
+  scene.add(gltf.scene);
+});
+```
+
+### GLTF with KTX2 Textures
+
+```javascript
+import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";
+import { KTX2Loader } from "three/addons/loaders/KTX2Loader.js";
+
+const ktx2Loader = new KTX2Loader();
+ktx2Loader.setTranscoderPath(
+  "https://cdn.jsdelivr.net/npm/three@0.160.0/examples/jsm/libs/basis/",
+);
+ktx2Loader.detectSupport(renderer);
+
+const gltfLoader = new GLTFLoader();
+gltfLoader.setKTX2Loader(ktx2Loader);
+
+gltfLoader.load("model-with-ktx2.glb", (gltf) => {
+  scene.add(gltf.scene);
+});
+```
+
+### Process GLTF Content
+
+```javascript
+loader.load("model.glb", (gltf) => {
+  const model = gltf.scene;
+
+  // Enable shadows
+  model.traverse((child) => {
+    if (child.isMesh) {
+      child.castShadow = true;
+      child.receiveShadow = true;
+    }
+  });
+
+  // Find specific mesh
+  const head = model.getObjectByName("Head");
+
+  // Adjust materials
+  model.traverse((child) => {
+    if (child.isMesh && child.material) {
+      child.material.envMapIntensity = 0.5;
+    }
+  });
+
+  // Center and scale
+  const box = new THREE.Box3().setFromObject(model);
+  const center = box.getCenter(new THREE.Vector3());
+  const size = box.getSize(new THREE.Vector3());
+
+  model.position.sub(center);
+  const maxDim = Math.max(size.x, size.y, size.z);
+  model.scale.setScalar(1 / maxDim);
+
+  scene.add(model);
+});
+```
+
+## Other Model Formats
+
+### OBJ + MTL
+
+```javascript
+import { OBJLoader } from "three/addons/loaders/OBJLoader.js";
+import { MTLLoader } from "three/addons/loaders/MTLLoader.js";
+
+const mtlLoader = new MTLLoader();
+mtlLoader.load("model.mtl", (materials) => {
+  materials.preload();
+
+  const objLoader = new OBJLoader();
+  objLoader.setMaterials(materials);
+  objLoader.load("model.obj", (object) => {
+    scene.add(object);
+  });
+});
+```
+
+### FBX
+
+```javascript
+import { FBXLoader } from "three/addons/loaders/FBXLoader.js";
+
+const loader = new FBXLoader();
+loader.load("model.fbx", (object) => {
+  // FBX often has large scale
+  object.scale.setScalar(0.01);
+
+  // Animations
+  const mixer = new THREE.AnimationMixer(object);
+  object.animations.forEach((clip) => {
+    mixer.clipAction(clip).play();
+  });
+
+  scene.add(object);
+});
+```
+
+### STL
+
+```javascript
+import { STLLoader } from "three/addons/loaders/STLLoader.js";
+
+const loader = new STLLoader();
+loader.load("model.stl", (geometry) => {
+  const material = new THREE.MeshStandardMaterial({ color: 0x888888 });
+  const mesh = new THREE.Mesh(geometry, material);
+  scene.add(mesh);
+});
+```
+
+### PLY
+
+```javascript
+import { PLYLoader } from "three/addons/loaders/PLYLoader.js";
+
+const loader = new PLYLoader();
+loader.load("model.ply", (geometry) => {
+  geometry.computeVertexNormals();
+  const material = new THREE.MeshStandardMaterial({ vertexColors: true });
+  const mesh = new THREE.Mesh(geometry, material);
+  scene.add(mesh);
+});
+```
+
+## Async/Promise Loading
+
+### Promisified Loader
+
+```javascript
+function loadModel(url) {
+  return new Promise((resolve, reject) => {
+    loader.load(url, resolve, undefined, reject);
+  });
+}
+
+// Usage
+async function init() {
+  try {
+    const gltf = await loadModel("model.glb");
+    scene.add(gltf.scene);
+  } catch (error) {
+    console.error("Failed to load model:", error);
+  }
+}
+```
+
+### Load Multiple Assets
+
+```javascript
+async function loadAssets() {
+  const [modelGltf, envTexture, colorTexture] = await Promise.all([
+    loadGLTF("model.glb"),
+    loadRGBE("environment.hdr"),
+    loadTexture("color.jpg"),
+  ]);
+
+  scene.add(modelGltf.scene);
+  scene.environment = envTexture;
+  material.map = colorTexture;
+}
+
+// Helper functions
+function loadGLTF(url) {
+  return new Promise((resolve, reject) => {
+    new GLTFLoader().load(url, resolve, undefined, reject);
+  });
+}
+
+function loadRGBE(url) {
+  return new Promise((resolve, reject) => {
+    new RGBELoader().load(
+      url,
+      (texture) => {
+        texture.mapping = THREE.EquirectangularReflectionMapping;
+        resolve(texture);
+      },
+      undefined,
+      reject,
+    );
+  });
+}
+
+function loadTexture(url) {
+  return new Promise((resolve, reject) => {
+    new THREE.TextureLoader().load(url, resolve, undefined, reject);
+  });
+}
+```
+
+## Caching
+
+### Built-in Cache
+
+```javascript
+// Enable cache
+THREE.Cache.enabled = true;
+
+// Clear cache
+THREE.Cache.clear();
+
+// Manual cache management
+THREE.Cache.add("key", data);
+THREE.Cache.get("key");
+THREE.Cache.remove("key");
+```
+
+### Custom Asset Manager
+
+```javascript
+class AssetManager {
+  constructor() {
+    this.textures = new Map();
+    this.models = new Map();
+    this.gltfLoader = new GLTFLoader();
+    this.textureLoader = new THREE.TextureLoader();
+  }
+
+  async loadTexture(key, url) {
+    if (this.textures.has(key)) {
+      return this.textures.get(key);
+    }
+
+    const texture = await new Promise((resolve, reject) => {
+      this.textureLoader.load(url, resolve, undefined, reject);
+    });
+
+    this.textures.set(key, texture);
+    return texture;
+  }
+
+  async loadModel(key, url) {
+    if (this.models.has(key)) {
+      return this.models.get(key).clone();
+    }
+
+    const gltf = await new Promise((resolve, reject) => {
+      this.gltfLoader.load(url, resolve, undefined, reject);
+    });
+
+    this.models.set(key, gltf.scene);
+    return gltf.scene.clone();
+  }
+
+  dispose() {
+    this.textures.forEach((t) => t.dispose());
+    this.textures.clear();
+    this.models.clear();
+  }
+}
+
+// Usage
+const assets = new AssetManager();
+const texture = await assets.loadTexture("brick", "brick.jpg");
+const model = await assets.loadModel("tree", "tree.glb");
+```
+
+## Loading from Different Sources
+
+### Data URL / Base64
+
+```javascript
+const loader = new THREE.TextureLoader();
+const texture = loader.load("data:image/png;base64,iVBORw0KGgo...");
+```
+
+### Blob URL
+
+```javascript
+async function loadFromBlob(blob) {
+  const url = URL.createObjectURL(blob);
+  const texture = await loadTexture(url);
+  URL.revokeObjectURL(url);
+  return texture;
+}
+```
+
+### ArrayBuffer
+
+```javascript
+// From fetch
+const response = await fetch("model.glb");
+const buffer = await response.arrayBuffer();
+
+// Parse with loader
+const loader = new GLTFLoader();
+loader.parse(buffer, "", (gltf) => {
+  scene.add(gltf.scene);
+});
+```
+
+### Custom Path/URL
+
+```javascript
+// Set base path
+loader.setPath("assets/models/");
+loader.load("model.glb"); // Loads from assets/models/model.glb
+
+// Set resource path (for textures referenced in model)
+loader.setResourcePath("assets/textures/");
+
+// Custom URL modifier
+manager.setURLModifier((url) => {
+  return `https://cdn.example.com/${url}`;
+});
+```
+
+## Error Handling
+
+```javascript
+// Graceful fallback
+async function loadWithFallback(primaryUrl, fallbackUrl) {
+  try {
+    return await loadModel(primaryUrl);
+  } catch (error) {
+    console.warn(`Primary failed, trying fallback: ${error}`);
+    return await loadModel(fallbackUrl);
+  }
+}
+
+// Retry logic
+async function loadWithRetry(url, maxRetries = 3) {
+  for (let i = 0; i < maxRetries; i++) {
+    try {
+      return await loadModel(url);
+    } catch (error) {
+      if (i === maxRetries - 1) throw error;
+      await new Promise((r) => setTimeout(r, 1000 * (i + 1)));
+    }
+  }
+}
+
+// Timeout
+async function loadWithTimeout(url, timeout = 30000) {
+  const controller = new AbortController();
+  const timeoutId = setTimeout(() => controller.abort(), timeout);
+
+  try {
+    const response = await fetch(url, { signal: controller.signal });
+    clearTimeout(timeoutId);
+    return response;
+  } catch (error) {
+    if (error.name === "AbortError") {
+      throw new Error("Loading timed out");
+    }
+    throw error;
+  }
+}
+```
+
+## Performance Tips
+
+1. **Use compressed formats**: DRACO for geometry, KTX2/Basis for textures
+2. **Load progressively**: Show placeholders while loading
+3. **Lazy load**: Only load what's needed
+4. **Use CDN**: Faster asset delivery
+5. **Enable cache**: `THREE.Cache.enabled = true`
+
+```javascript
+// Progressive loading with placeholder
+const placeholder = new THREE.Mesh(
+  new THREE.BoxGeometry(1, 1, 1),
+  new THREE.MeshBasicMaterial({ wireframe: true }),
+);
+scene.add(placeholder);
+
+loadModel("model.glb").then((gltf) => {
+  scene.remove(placeholder);
+  scene.add(gltf.scene);
+});
+```
+
+## See Also
+
+- `threejs-textures` - Texture configuration
+- `threejs-animation` - Playing loaded animations
+- `threejs-materials` - Material from loaded models