Kevin Powell - Community•5mo ago

Help Replicating This

As a tool to learn new techniques, I'm recreating things I find on the web. Today I'm trying to do the mouseover image effect seen on this website (while in desktop screen sizes) https://en.bazil.fr/ I managed to get close with this react hook...

import { useEffect, useRef } from "react";

export default function useMouseMove() {
  const imageRef = useRef();
  const yCap = 1;
  const xCap = 3;

  useEffect(() => {
    const handleMouseMove = (event) => {
      const { clientX, clientY } = event;
      const centerX = window.innerWidth / 2;
      const centerY = window.innerHeight / 2;

      let posX = ((clientX - centerX) / centerX) * 100; // as a percentage of half the viewport width
      let posY = ((clientY - centerY) / centerY) * 100; // as a percentage of half the viewport height

      // Calculate the distance of the mouse from the center of the viewport
      const distance = Math.sqrt(
        Math.pow(clientX - centerX, 2) + Math.pow(clientY - centerY, 2)
      );

      // Use the distance to calculate the scaling factor
      const scaleFactor = Math.pow(distance, 2);

      posX *= scaleFactor;
      posY *= scaleFactor;

      const cappedPosX = Math.min(Math.max(posX, xCap * -1), xCap);
      const cappedPosY = Math.min(Math.max(posY, yCap * -1), yCap);

      imageRef.current.style.transform = `translate(${cappedPosX}vw, ${cappedPosY}vh)`;
    };

    window.addEventListener("mousemove", handleMouseMove);

    return () => {
      window.removeEventListener("mousemove", handleMouseMove);
    };
  }, []);

  return imageRef;
}

import { useEffect, useRef } from "react";

export default function useMouseMove() {
  const imageRef = useRef();
  const yCap = 1;
  const xCap = 3;

  useEffect(() => {
    const handleMouseMove = (event) => {
      const { clientX, clientY } = event;
      const centerX = window.innerWidth / 2;
      const centerY = window.innerHeight / 2;

      let posX = ((clientX - centerX) / centerX) * 100; // as a percentage of half the viewport width
      let posY = ((clientY - centerY) / centerY) * 100; // as a percentage of half the viewport height

      // Calculate the distance of the mouse from the center of the viewport
      const distance = Math.sqrt(
        Math.pow(clientX - centerX, 2) + Math.pow(clientY - centerY, 2)
      );

      // Use the distance to calculate the scaling factor
      const scaleFactor = Math.pow(distance, 2);

      posX *= scaleFactor;
      posY *= scaleFactor;

      const cappedPosX = Math.min(Math.max(posX, xCap * -1), xCap);
      const cappedPosY = Math.min(Math.max(posY, yCap * -1), yCap);

      imageRef.current.style.transform = `translate(${cappedPosX}vw, ${cappedPosY}vh)`;
    };

    window.addEventListener("mousemove", handleMouseMove);

    return () => {
      window.removeEventListener("mousemove", handleMouseMove);
    };
  }, []);

  return imageRef;
}

... I noticed in dev tools that his image translated up to 3vw and 1vh respectively... but his is buttery smooth, and almost elasticated. The further the mouse moves away from the origin the less the image moves. Mine just stops at the movement cap... I made a sandbox Any advice in getting this to work would be amazing. Thanks!

Bazil Hamard - Freelance webdesigner & photographer - Paris

Webdesigner, Webflow expert & photographer, I help you to create your graphic identity, to perpetuate your brand image and to design a website adapted to your needs.

1 Reply

EIO•5mo ago

What you're looking for is apparently the opposite of the effect Hyperplexed did here: https://codepen.io/Hyperplexed/pen/wvQzbGz You'd just need to fine tune it to your use case. One easy step to begin is to pay attention to the mouse.multiplier object. See where it was defined, play with the values and see how it affects the overall effect.

Hyperplexed

CodePen

Magic Wand Reveal

...

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Help Replicating This