I am trying to animate an array of meshes in Three.js, but the properties are not being recognized.
tl.staggerFrom(array, 2, {"position.y":-100})
The position.y doesn't change. When I use console.log(array[0].position.y), it gives me the initial value of position.y.
How can I successfully use stagger animation with Three.js meshes?
It seems that you are utilizing GSAP (TweenMax), a library that necessitates the use of shallow objects as its animation parameter. This implies that you cannot animate a variable with a depth of 2 or more levels; for instance, you cannot animate array[0].position.y, but you can certainly animate position.y. Keeping this in consideration, contemplate the following:
// Store all positions in a new array
var allPositions = [];
for (var i = 0; i < array.length; i++) {
allPositions.push(array[i].position);
}
// Utilize shallower objects to animate the y attribute
tl.staggerFrom(allPositions,2,{y: -100});
I came up with a solution using proxies. For each mesh, I create a new proxy instance and define its set property to handle desired operations. These proxies are then added to an array which is used in the stagger function.
For example:
for(let i=0;i<5;i++){
let mesh = new THREE.Mesh(geometry,material);
let proxy = new Proxy({positionY:null},{
set(target,key,value){
target[key] = value;
if(target[key] !== null){
mesh.position.y = target.positionY
}
return true;
},
get(target,key){
return target[key];
}
})
proxy.positionY = 0
aarray.push(proxy)
}
tl.staggerFrom(aarray,5,{positionY:-100})
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