Hiring a Skilled Three.js Developer for an Interactive 3D Presentation

I need to provide some technical guidance regarding your Three.js project requirements. Based on the information provided, here are some key technical considerations for implementing this interactive 3D presentation:

Three.js Implementation Recommendations

Core Technologies

For your project, you'll need to utilize these Three.js components:

• Installation: Install Three.js via npm for the best development experience

BASHCopied
npm install three

• Scene Setup: Create a basic scene with proper camera and renderer configuration

JAVASCRIPTCopied
import * as THREE from 'three';

const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
const renderer = new THREE.WebGLRenderer({ antialias: true });
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

Interactive Controls

For the interactive globe and city exploration:

• OrbitControls: Implement for smooth rotation and zoom of the 3D globe

JAVASCRIPTCopied
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js';

const controls = new OrbitControls(camera, renderer.domElement);
controls.enableDamping = true; // For smooth animation
controls.dampingFactor = 0.05;
controls.screenSpacePanning = false;
controls.minDistance = 5;
controls.maxDistance = 50;

Particle Effects

For the golden particle effects in the introduction:

JAVASCRIPTCopied
// Create particle geometry
const particleGeometry = new THREE.BufferGeometry();
const particleCount = 5000;
const posArray = new Float32Array(particleCount * 3);

// Fill with random positions
for (let i = 0; i < particleCount * 3; i++) {
  posArray[i] = (Math.random() - 0.5) * 10;
}
particleGeometry.setAttribute('position', new THREE.BufferAttribute(posArray, 3));

// Create particle material with custom shader for golden effect
const particleMaterial = new THREE.PointsMaterial({
  size: 0.05,
  color: 0xffd700, // Gold color
  transparent: true,
  blending: THREE.AdditiveBlending
});

const particleSystem = new THREE.Points(particleGeometry, particleMaterial);
scene.add(particleSystem);

Animation System

For the airplane animations and transitions between years:

JAVASCRIPTCopied
import { gsap } from 'gsap';

// Animate plane movement between countries
function animatePlane(plane, startPosition, endPosition) {
  gsap.to(plane.position, {
    x: endPosition.x,
    y: endPosition.y,
    z: endPosition.z,
    duration: 5,
    ease: "power1.inOut",
    onUpdate: function() {
      // Update plane rotation to follow path
      // Code to calculate direction vector and rotation
    }
  });
}

Country Highlighting

For highlighting countries in gold during the expansion timeline:

JAVASCRIPTCopied
function highlightCountry(countryMesh, active) {
  gsap.to(countryMesh.material, {
    emissive: active ? new THREE.Color(0xffd700) : new THREE.Color(0x000000),
    emissiveIntensity: active ? 0.5 : 0,
    duration: 1
  });
}

Camera Transitions

For smooth zooming into cities:

JAVASCRIPTCopied
function zoomToCity(cityPosition) {
  gsap.to(camera.position, {
    x: cityPosition.x + 2,
    y: cityPosition.y + 2,
    z: cityPosition.z + 5,
    duration: 2,
    ease: "power2.inOut",
    onUpdate: function() {
      camera.lookAt(cityPosition);
    }
  });
}

Performance Optimization

To ensure cross-platform compatibility:

JAVASCRIPTCopied
// Responsive design
window.addEventListener('resize', () => {
  camera.aspect = window.innerWidth / window.innerHeight;
  camera.updateProjectionMatrix();
  renderer.setSize(window.innerWidth, window.innerHeight);
});

// Level of detail management for mobile
function setDetailLevel() {
  const isMobile = window.innerWidth < 768;
  renderer.setPixelRatio(isMobile ? Math.min(window.devicePixelRatio, 2) : window.devicePixelRatio);
  
  // Adjust particle count and model complexity based on device
  particleSystem.material.size = isMobile ? 0.03 : 0.05;
  // Additional optimizations for mobile
}

These code examples should provide a starting point for implementing the key features of your interactive 3D presentation. The developer you hire will need to expand on these concepts and integrate them into a cohesive application that meets your specific requirements.