Three.js and gsap scale animation

So I'm trying to do a mousemove event in three.js where the user would hover over a geometry and then it would scale. So for the animations I am using GSAP as tween doesn't seem to be working for me. However, I keep getting this error when I want to scale my geometry:

I don't know why because in the official gsap documentation they use scale, without a plugin I believe. Here is an example from their website

gsap.to(".box", 1, { scale: 0.1, y: 60, yoyo: true, repeat: -1, ease: "power1.inOut", delay:1, stagger: { amount: 1.5, grid: "auto", from: "center" } });

Here is my code:

function init () {
/*------Bunch of three.js code and initialsation*/ window.addEventListener('mousemove',onMouseMove);
}
function onMouseMove(event) { event.preventDefault(); mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1; mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1; raycaster.setFromCamera(mouse,camera); var intersects = raycaster.intersectObjects(scene.children, true); for(var i = 0; i < intersects.length; i++) { gsap.to(intersects[i].object.scale, {duration: 1, scale: 0.8}); } }

1 Answer

So I figured the answer. It seems that in three.js, the gsap scale property doesn't work so you need to make sure you're referring to scale before adding transformations, and then use x and y (or maybe z - I haven't tried) to increase or decrease the size. This is the code that worked for me:

gsap.to(intersects[i].object.scale, {duration: .7, x: 1.2, y:1.2});