So i am trying to change the fog density by tweening it is this possible because it doesn't seem to change here's my defaults:
var camera, densityFog, colorFog2;
colorFog2 = 0xfee2ed;
densityFog = 0.25;
scene.fog = new THREE.FogExp2(colorFog2, densityFog);
and here is what I've tried using the libs GSAP and tweenjs:
tween = new TWEEN.Tween(scene.fog)
.to({densityFog: 0.02}, 1000 )
.easing(TWEEN.Easing.Exponential.InOut)
.onComplete(function() { }).start();
gsap.to(scene.fog, {
duration: 2,
densityFog: 0.02,
onUpdate: function () {
controls.update();
isZoomed = 0;
controls.enabled = false;
},
});
can anyone point me in the right direction?
This answer uses gsap
Use an object eg. myfog = { value: .5 }
and tween its value
property to what you desire.
Then in onUpdate
, set scene.fog
to a new THREE.FogExp2
with the current myfog.value
as a parameter.
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.z = 5;
camera.position.y = 2;
// Init the object and fog here
var myfog = { value: .5 }
scene.fog = new THREE.FogExp2(0x00ff00, myfog.value);
var geometry = new THREE.BoxGeometry(1, 1, 5);
var mat = new THREE.MeshBasicMaterial({
color: 0xff0000
});
var mesh = new THREE.Mesh(geometry, mat);
scene.add(mesh);
var renderer = new THREE.WebGLRenderer({
antialias: true
});
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.setClearColor(0x00ff00);
document.body.appendChild(renderer.domElement);
function render() {
renderer.render(scene, camera);
}
function animate() {
requestAnimationFrame(animate);
render();
}
animate();
// This animates the fog
gsap.to(myfog, {
duration: 2,
value: 0.002, // The end value
onUpdate: function() {
// New fog with current myfog value
scene.fog = new THREE.FogExp2(0x00ff00, myfog.value);
},
// These just infinitely repeat the animation
yoyo: true,
repeat: -1,
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.6.1/gsap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r127/three.min.js"></script>