I have been working with three.js and have successfully animated some objects using the animate() function. Here's a snippet of my code:
function animate(){
object.position.z++;
}
The issue I'm facing is that this function is called every rendered frame, leading to varying speeds for my object on devices with different framerates. Is there a way to synchronize the animation based on seconds or milliseconds?
Thank you!
Another option is to use THREE.Clock() within the realm of three.js:
var clock = new THREE.Clock();
var speed = 2; //units a second
var delta = 0;
render();
function render(){
requestAnimationFrame(render);
delta = clock.getDelta();
object.position.z += speed * delta;
renderer.render(scene, camera);
}
Check out this jsfiddle example r86
requestAnimationFrame calculates the time elapsed since the page loaded and includes it in the callback function. Personally, I prefer working with time in seconds, but the provided time is in milliseconds.
let then = 0;
function animate(now) {
now *= 0.001; // converting to seconds
const delta = now - then;
then = now;
object.position.z += delta * speedInUnitsPerSecond;
...
requestAnimationFrame(animate);
}
requestAnimationFrame(animate);
PS: It's surprising this information isn't already on Stack Overflow. It might be buried somewhere, though. RequestAnimationFrame and its usage in Three.js have likely been discussed before, just maybe not in the specific context mentioned here.
For further reading, check out: Best options for animation in THREE.JS
If you want to achieve smooth animations in Three.js, consider using TWEEN library. For a step-by-step guide on how to use TWEEN, check out this tutorial:
Implementing TWEEN is quite simple:
new TWEEN.Tween(object.position).to(targetPos, 200).start().onComplete(()=>{
//Perform actions when animation is complete
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