r3f_component_gen

R3F Component Generator Skill

This skill provides the blueprint for "Neural Flux" 3D components.

IMPORTANT: This project uses a single-Canvas architecture. Only NeuralBackground.jsx has a <Canvas>. Do NOT create additional Canvas instances.

🎨 Scene Standards

• Performance: Always limit pixel ratio.

  <Canvas
    dpr={[1, 1.5]}
    gl={{ antialias: true, alpha: true, powerPreference: 'high-performance' }}
    camera={{ position: [0, 0, 10], fov: 60 }}
  >
  

• Responsiveness: Adjust particle counts based on viewport:

  const PARTICLE_COUNT_DESKTOP = 1500
  const PARTICLE_COUNT_MOBILE = 500
  // Use window.matchMedia('(max-width: 768px)') to switch
  

🧩 Templates

1. Particle System (Points + PointMaterial from drei)

Used in NeuralParticles — the primary particle visualization:

import { Points, PointMaterial } from '@react-three/drei'
import * as THREE from 'three'

function NeuralParticles({ particleCount }) {
  const ref = useRef()
  const [positions] = useMemo(() => {
    const pos = new Float32Array(particleCount * 3)
    for (let i = 0; i < particleCount; i++) {
      const theta = Math.random() * Math.PI * 2
      const phi = Math.acos((Math.random() * 2) - 1)
      const radius = 3 + Math.random() * 8
      pos[i * 3] = radius * Math.sin(phi) * Math.cos(theta)
      pos[i * 3 + 1] = radius * Math.sin(phi) * Math.sin(theta)
      pos[i * 3 + 2] = radius * Math.cos(phi)
    }
    return [pos]
  }, [particleCount])

  useFrame((state, delta) => {
    ref.current.rotation.y += delta * 0.05  // Use delta for frame-rate independence
  })

  return (
    <Points ref={ref} positions={positions} stride={3} frustumCulled={true}>
      <PointMaterial transparent size={0.015} sizeAttenuation depthWrite={false}
        blending={THREE.AdditiveBlending} opacity={0.8} />
    </Points>
  )
}

2. Instanced Mesh (for multiple objects)

Used in GlowingOrbs — efficient rendering of 5 colored wireframe orbs:

function GlowingOrbs() {
  const meshRef = useRef()
  const geometry = useMemo(() => new THREE.IcosahedronGeometry(1, 1), [])
  const dummy = useMemo(() => new THREE.Object3D(), [])

  useEffect(() => {
    orbs.forEach((orb, i) => {
      meshRef.current.setColorAt(i, new THREE.Color(orb.color))
    })
    meshRef.current.instanceColor.needsUpdate = true
  }, [orbs])

  useFrame((state, delta) => {
    orbs.forEach((orb, i) => {
      dummy.position.set(orb.x, orb.y + Math.sin(state.clock.elapsedTime + orb.phase) * 0.5, orb.z)
      dummy.updateMatrix()
      meshRef.current.setMatrixAt(i, dummy.matrix)
    })
    meshRef.current.instanceMatrix.needsUpdate = true
  })

  return (
    <instancedMesh ref={meshRef} args={[geometry, null, orbs.length]} frustumCulled={false}>
      <meshBasicMaterial transparent opacity={0.3} wireframe vertexColors />
    </instancedMesh>
  )
}

3. Line Segments (connection lines)

Used in ConnectionLines — decorative lines between points:

function ConnectionLines() {
  const geometry = useMemo(() => {
    const points = []
    for (let i = 0; i < 20; i++) {
      // Push start and end positions as flat arrays
      points.push(x1, y1, z1, x2, y2, z2)
    }
    const geo = new THREE.BufferGeometry()
    geo.setAttribute('position', new THREE.Float32BufferAttribute(points, 3))
    return geo
  }, [])

  return (
    <lineSegments geometry={geometry}>
      <lineBasicMaterial color="#6366f1" transparent opacity={0.15} />
    </lineSegments>
  )
}

⚠️ "Wow Factor" Checklist

1. Motion: Is it moving? Static 3D is boring. Add useFrame rotation or floating.
2. Interaction: Does it react to the mouse? Use mouseRef from MouseContext (NOT useState).
3. Material: Use Neon/Cyberpunk palette from CSS vars (--neon-violet, --neon-cyan).
4. Performance: Use delta parameter in useFrame for frame-rate independence.
5. Cleanup: Memoize geometry/materials with useMemo — never create in render body.