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Building a 100,000 Particle Engine at 60 FPS with Three.js & Custom Shaders

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Introduction to ParticleVerse Studio

Rendering high-density particle systems in web browsers while maintaining a fluid 60 FPS frame rate requires efficient GPU compute shaders and optimized scene graph management.

In ParticleVerse Studio, I built an interactive 3D particle engine capable of rendering up to 100,000 particles simultaneously in WebGL.

Key Technologies Used

  • Three.js & React Three Fiber (R3F): Declarative WebGL rendering loop.
  • Custom GLSL Shaders: Vertex and fragment shaders executing particle position morphs directly on the GPU.
  • Zustand State Management: Lightweight zero-boilerplate state transitions between 17 geometric shape configurations.

Performance Optimization Highlights

  1. Instanced Buffer Geometry: Reduced draw calls from 100,000 to just 1 single draw call.
  2. GPU Attribute Interpolation: Calculated morphing vectors inside vertex shaders to prevent CPU bottlenecking.
  3. Webcam Integration: Embedded real-time webcam brightness data to modulate particle field intensity dynamically.