React Three Fiber (R3F) Integration Example

[koljam]

First, thank you for creating this excellent library! I've been banging my head against the wall for some time trying to get proper transparency rendering.

While implementing three-wboit with React Three Fiber, I ran into some challenges and wanted to share a working solution that might help others.

Here's a minimal working example:

// WBOITPass.jsx - Separate component to handle WBOIT setup
function WBOITPass() {
  const { gl, scene, camera } = useThree();
  
  useEffect(() => {
    const wboitPass = new WboitPass(gl, scene, camera, 0, 1.0);
    const originalRender = gl.render.bind(gl);
    let isRendering = false;

    gl.render = function (...args) {
      if (isRendering) {
        return originalRender.apply(this, args);
      }
      isRendering = true;
      wboitPass.render(gl);
      isRendering = false;
    };

    return () => {
      gl.render = originalRender;
    };
  }, [gl, scene, camera]);

  return null;
}

// Usage in your scene
function App() {
  return (
    <Canvas gl={{ alpha: true }}>
      <WBOITPass />
      {/* Your scene content */}
    </Canvas>
  );
}

// Patching materials
const material = useMemo(() => {
  const material = new THREE.MeshStandardMaterial({
    transparent: true,
    opacity: 0.5
  });
  WboitUtils.patch(material);
  return material;
}, []);

The key points:

• Create a separate component to handle WBOIT setup
• Use a rendering flag to prevent recursion
• Patch materials inside useMemo to prevent recreation
• Add the WBOITPass component to your Canvas

Hope this helps future R3F users!