How to get OrbitControls methods when using the glfloader (react)

Questions
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#1

Greetings!

I uploaded the 3D model via gltfLoader

How to access the getAzimuthalAngle() method based on the code below?

return (
    <div className={classes.Voxel}>
      <Canvas camera={{ position: [10, 5, 35], zoom: 3.5 }}>
        <OrbitControls
          autoRotate={true}
          autoRotateSpeed={0.75}
          enableZoom={false}
          enablePan={false}
          maxAzimuthAngle={1}
          minAzimuthAngle={-1}
        />
        <hemisphereLight intensity={0.55} />
        <spotLight
          position={[10, 10, 10]}
          angle={0.7}
          penumbra={1}
          intensity={2}
          castShadow
        />
        <Suspense fallback={null}>
          <Win95 />
        </Suspense>
      </Canvas>
    </div>
  );
#2 
const ref = useRef()
useEffect(() => {
  ref.current.getAzimuthalAngle()
}, [])
return <OrbitControls autoRotate ref={ref} />

if you’re wondering how to get the azimuthalangle anywhere else in the component tree, in recent versions we have added “controls” to the state model so that any control can make itself known which is great for interop:

<OrbitControls autoRotate makeDefault />
<Foo />

function Foo() {
  const controls = useThree(state => state.controls)
  ...
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#3

Thank you so much!

#4

Can you please tell me what should I pass to the second argument in UseEffect to get my model updated every time its azimuthAngle gets 1 or -1?

const ref = useRef(null);

  useEffect(() => {
    if (ref.current !== null) {
      if (ref.current.getAzimuthalAngle() === -1 || ref.current.getAzimuthalAngle() === 1)
        setSpeed(-speed);
    }
  }, [ // Here??? ]);
#5

threejs is not reactive, controls changing some internal value is of no concern to useEffect. useEffect triggers after a component has rendered (by react), but something must be the cause for that: a prop change, setState, etc.

you can use useFrame which fires every frame (60fps) but do not call setSpeed in there but set the speed directly.

1 Like