react-native-reanimated/lib/reanimated2/utils.js

More powerful alternative to Animated library for React Native.

import { measure } from './NativeMethods';
/**
 * Given an absolute position and a component ref, returns the relative
 * position in the component's local coordinate space.
 */
export function getRelativeCoords(parentRef, absoluteX, absoluteY) {
    'worklet';
    const parentCoords = measure(parentRef);
    if (parentCoords === null) {
        return null;
    }
    return {
        x: absoluteX - parentCoords.x,
        y: absoluteY - parentCoords.y,
    };
}