Initial project import

node_modules/@react-three/drei/core/useIntersect.js

@@ -0,0 +1,36 @@
+import * as React from 'react';
+import { addEffect, addAfterEffect } from '@react-three/fiber';
+
+function useIntersect(onChange) {
+  const ref = React.useRef(null);
+  const check = React.useRef(false);
+  const temp = React.useRef(false);
+  const callback = React.useRef(onChange);
+  React.useLayoutEffect(() => void (callback.current = onChange), [onChange]);
+  React.useEffect(() => {
+    const obj = ref.current;
+    if (obj) {
+      // Stamp out frustum check pre-emptively
+      const unsub1 = addEffect(() => {
+        check.current = false;
+        return true;
+      });
+      // If the object is inside the frustum three will call onRender
+      const oldOnRender = obj.onBeforeRender;
+      obj.onBeforeRender = () => check.current = true;
+      // Compare the check value against the temp value, if it differs set state
+      const unsub2 = addAfterEffect(() => {
+        if (check.current !== temp.current) callback.current == null || callback.current(temp.current = check.current);
+        return true;
+      });
+      return () => {
+        obj.onBeforeRender = oldOnRender;
+        unsub1();
+        unsub2();
+      };
+    }
+  }, []);
+  return ref;
+}
+
+export { useIntersect };