feat: added task 3 in r3f

Week-2/Task-3/r3f/src/App.css

@@ -1,10 +1,12 @@
-* {
-  margin: 0;
-  padding: 0;
-  box-sizing: border-box;
+.app-container {
+  width: 100vw;
+  height: 100vh;
+  position: relative;
+  background-color: white;
+  overflow: hidden;
 }
 
-body {
-  overflow: hidden;
-  background-color: #111;
-  font-family: sans-serif;
+.canvas-wrapper {
+  width: 100%;
+  height: 100%;
+}

Week-2/Task-3/r3f/src/App.jsx

@@ -1,5 +1,64 @@
+import React, { useState } from 'react';
+import { Canvas } from '@react-three/fiber';
+import { OrbitControls, PerspectiveCamera } from '@react-three/drei';
+import './App.css';
+
+const variants = {
+  black: {
+    geometry: <boxGeometry args={[2, 2, 2]} />,
+    material: { color: "black", roughness: 1, metalness: 0 }
+  },
+  silver: {
+    geometry: <sphereGeometry args={[1.5, 32, 32]} />,
+    material: { color: "#C0C0C0", roughness: 0.3, metalness: 1 }
+  },
+  gold: {
+    geometry: <torusGeometry args={[1.2, 0.4, 16, 100]} />,
+    material: { color: "#FFD700", roughness: 0.4, metalness: 1 }
+  }
+};
+
+function Product({ variant }) {
+  const { geometry, material } = variants[variant];
+  
+  return (
+    <mesh>
+      {geometry}
+      <meshStandardMaterial {...material} />
+    </mesh>
+  );
+}
+
 export default function App() {
-    return (
-        <></>
-    )
+  const [activeVariant, setActiveVariant] = useState('black');
+
+  return (
+    <div className="app-container">
+      <div id="controls">
+        {Object.keys(variants).map((variant) => (
+          <button
+            key={variant}
+            className={activeVariant === variant ? 'active' : ''}
+            onClick={() => setActiveVariant(variant)}
+          >
+            {variant.charAt(0).toUpperCase() + variant.slice(1)}
+          </button>
+        ))}
+      </div>
+
+      <div className="canvas-wrapper">
+        <Canvas dpr={[1, 2]}>
+          <color attach="background" args={["white"]} />
+          <PerspectiveCamera makeDefault position={[0, 0, 5]} />
+          
+          <ambientLight intensity={0.6 * Math.PI} />
+          <pointLight position={[5, 5, 5]} intensity={1.0 * Math.PI} />
+
+          <Product variant={activeVariant} />
+
+          <OrbitControls makeDefault enableDamping dampingFactor={0.05} />
+        </Canvas>
+      </div>
+    </div>
+  );
 }