Listen up. If you're building modern applications, understanding Introduction to WebGL & Three.js is non-negotiable. This is where simple logic turns into intelligent behavior.
1Threejs intro Part 1
Welcome to the world of 3D on the Web! Before Three.js, building 3D scenes meant writing hundreds of lines of complex WebGL code. Three.js changed everything.
Look, here's the reality in production: if you don't fully grasp this, you're going to introduce massive bottlenecks or incorrect predictions. I've seen junior devs deploy models that hallucinate wildly because they missed this exact nuance. It's all about understanding the data pipeline and model parameters.
Let's break down the code. Notice how we're structuring this logic. We aren't just hacking things together; we're designing for scale and accuracy. If you mess up the inference loop or create new tensors every frame here, the runtime won't optimize it, and you'll get massive memory leaks. Always follow ML engineering best practices.
// Vanilla WebGL requires insane amounts of math
// Three.js makes it as easy as building with Lego bricks!3D Scene rendered. Objects: 4, Draw Calls: Optimized.
2Threejs intro Part 2
At its core, a 3D application needs 3 things: A Scene (the universe), a Camera (your eyes), and a Renderer (the projector). We call this the Holy Trinity.
Look, here's the reality in production: if you don't fully grasp this, you're going to introduce massive bottlenecks or incorrect predictions. I've seen junior devs deploy models that hallucinate wildly because they missed this exact nuance. It's all about understanding the data pipeline and model parameters.
Let's break down the code. Notice how we're structuring this logic. We aren't just hacking things together; we're designing for scale and accuracy. If you mess up the inference loop or create new tensors every frame here, the runtime won't optimize it, and you'll get massive memory leaks. Always follow ML engineering best practices.
import * as THREE from 'three';
const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera();
const renderer = new THREE.WebGLRenderer();3D Scene rendered. Objects: 4, Draw Calls: Optimized.
3Threejs intro Part 3
What are the three fundamental components required to render anything in Three.js?
Look, here's the reality in production: if you don't fully grasp this, you're going to introduce massive bottlenecks or incorrect predictions. I've seen junior devs deploy models that hallucinate wildly because they missed this exact nuance. It's all about understanding the data pipeline and model parameters.
Let's break down the code. Notice how we're structuring this logic. We aren't just hacking things together; we're designing for scale and accuracy. If you mess up the inference loop or create new tensors every frame here, the runtime won't optimize it, and you'll get massive memory leaks. Always follow ML engineering best practices.
scene, camera, and ???3D Scene rendered. Objects: 4, Draw Calls: Optimized.
4Threejs intro Part 4
In modern React apps, we use a wrapper called
Look, here's the reality in production: if you don't fully grasp this, you're going to introduce massive bottlenecks or incorrect predictions. I've seen junior devs deploy models that hallucinate wildly because they missed this exact nuance. It's all about understanding the data pipeline and model parameters.
Let's break down the code. Notice how we're structuring this logic. We aren't just hacking things together; we're designing for scale and accuracy. If you mess up the inference loop or create new tensors every frame here, the runtime won't optimize it, and you'll get massive memory leaks. Always follow ML engineering best practices.
import { Canvas } from '@react-three/fiber';
function App() {
return (
<Canvas>
{/* 3D Objects go here */}
</Canvas>
);
}3D Scene rendered. Objects: 4, Draw Calls: Optimized.
5Threejs intro Part 5
Let
Look, here's the reality in production: if you don't fully grasp this, you're going to introduce massive bottlenecks or incorrect predictions. I've seen junior devs deploy models that hallucinate wildly because they missed this exact nuance. It's all about understanding the data pipeline and model parameters.
Let's break down the code. Notice how we're structuring this logic. We aren't just hacking things together; we're designing for scale and accuracy. If you mess up the inference loop or create new tensors every frame here, the runtime won't optimize it, and you'll get massive memory leaks. Always follow ML engineering best practices.
const Cube = () => {
const meshRef = React.useRef();
useFrame((state, delta) => {
meshRef.current.rotation.x += delta;
meshRef.current.rotation.y += delta;
});
return (
<mesh ref={meshRef}>
<boxGeometry />
<meshStandardMaterial color="hotpink" />
</mesh>
);
};
render(
<Canvas>
<ambientLight intensity={0.5} />
<directionalLight position={[2, 5, 2]} />
<Cube />
</Canvas>
);3D Scene rendered. Objects: 4, Draw Calls: Optimized.
6Threejs intro Part 6
In React Three Fiber, what component automatically creates the Scene, Camera, and Renderer?
Look, here's the reality in production: if you don't fully grasp this, you're going to introduce massive bottlenecks or incorrect predictions. I've seen junior devs deploy models that hallucinate wildly because they missed this exact nuance. It's all about understanding the data pipeline and model parameters.
Let's break down the code. Notice how we're structuring this logic. We aren't just hacking things together; we're designing for scale and accuracy. If you mess up the inference loop or create new tensors every frame here, the runtime won't optimize it, and you'll get massive memory leaks. Always follow ML engineering best practices.
<??? />3D Scene rendered. Objects: 4, Draw Calls: Optimized.
7Threejs intro Part 7
Notice how we used <mesh>, <boxGeometry>, and <meshStandardMaterial>? In R3F, all Three.js classes are available as lowercase HTML-like tags.
Look, here's the reality in production: if you don't fully grasp this, you're going to introduce massive bottlenecks or incorrect predictions. I've seen junior devs deploy models that hallucinate wildly because they missed this exact nuance. It's all about understanding the data pipeline and model parameters.
Let's break down the code. Notice how we're structuring this logic. We aren't just hacking things together; we're designing for scale and accuracy. If you mess up the inference loop or create new tensors every frame here, the runtime won't optimize it, and you'll get massive memory leaks. Always follow ML engineering best practices.
// THREE.BoxGeometry -> <boxGeometry />
// THREE.MeshStandardMaterial -> <meshStandardMaterial />3D Scene rendered. Objects: 4, Draw Calls: Optimized.
8Threejs intro Part 8
You can pass properties to these tags just like React props. To set the color, we use the color prop.
Look, here's the reality in production: if you don't fully grasp this, you're going to introduce massive bottlenecks or incorrect predictions. I've seen junior devs deploy models that hallucinate wildly because they missed this exact nuance. It's all about understanding the data pipeline and model parameters.
Let's break down the code. Notice how we're structuring this logic. We aren't just hacking things together; we're designing for scale and accuracy. If you mess up the inference loop or create new tensors every frame here, the runtime won't optimize it, and you'll get massive memory leaks. Always follow ML engineering best practices.
<meshStandardMaterial color="#00FF00" />3D Scene rendered. Objects: 4, Draw Calls: Optimized.
9Threejs intro Part 9
How would you write a THREE.SphereGeometry in React Three Fiber?
Look, here's the reality in production: if you don't fully grasp this, you're going to introduce massive bottlenecks or incorrect predictions. I've seen junior devs deploy models that hallucinate wildly because they missed this exact nuance. It's all about understanding the data pipeline and model parameters.
Let's break down the code. Notice how we're structuring this logic. We aren't just hacking things together; we're designing for scale and accuracy. If you mess up the inference loop or create new tensors every frame here, the runtime won't optimize it, and you'll get massive memory leaks. Always follow ML engineering best practices.
<??? />3D Scene rendered. Objects: 4, Draw Calls: Optimized.
10Threejs intro Part 10
Let
Look, here's the reality in production: if you don't fully grasp this, you're going to introduce massive bottlenecks or incorrect predictions. I've seen junior devs deploy models that hallucinate wildly because they missed this exact nuance. It's all about understanding the data pipeline and model parameters.
Let's break down the code. Notice how we're structuring this logic. We aren't just hacking things together; we're designing for scale and accuracy. If you mess up the inference loop or create new tensors every frame here, the runtime won't optimize it, and you'll get massive memory leaks. Always follow ML engineering best practices.
const Sphere = () => {
const meshRef = React.useRef();
useFrame((state, delta) => {
meshRef.current.rotation.y -= delta;
});
return (
<mesh ref={meshRef}>
<sphereGeometry args={[1.5, 32, 32]} />
<meshStandardMaterial color="#CCFF00" wireframe />
</mesh>
);
};
render(
<Canvas>
<ambientLight intensity={1} />
<Sphere />
</Canvas>
);3D Scene rendered. Objects: 4, Draw Calls: Optimized.
11Threejs intro Part 11
Awesome! You
Look, here's the reality in production: if you don't fully grasp this, you're going to introduce massive bottlenecks or incorrect predictions. I've seen junior devs deploy models that hallucinate wildly because they missed this exact nuance. It's all about understanding the data pipeline and model parameters.
Let's break down the code. Notice how we're structuring this logic. We aren't just hacking things together; we're designing for scale and accuracy. If you mess up the inference loop or create new tensors every frame here, the runtime won't optimize it, and you'll get massive memory leaks. Always follow ML engineering best practices.
// 🚀 Level 1 Complete!3D Scene rendered. Objects: 4, Draw Calls: Optimized.
