I have been diving into the world of three.js and recently came across this tutorial to enhance my skills. However, it seems that the code provided in the tutorial is not compatible with the current version of Three.js. After consulting this helpful resource, I made some modifications to the original code as shown below:
var k = 1;
const positions = sphere.geometry.attributes.position.array;
for (var i = 0; i < positions.length - 2; i++) {
const v = new THREE.Vector3(
positions[i],
positions[i + 1],
positions[i + 2]
).normalize()
.multiplyScalar(
1 + 0.3 * noise.perlin3(
positions[i] * k + time,
positions[i + 1] * k,
positions[i + 2] * k));
positions[i] = v.x;
positions[i + 1] = v.y;
positions[i + 2] = v.z;
}
sphere.geometry.attributes.position.needsUpdate = true;
However, despite these updates, the smoothness of vertex displacement is still lacking compared to the tutorial. Can anyone help me identify what might be missing here?
var renderer = new THREE.WebGLRenderer({ canvas : document.getElementById('canvas'), antialias:true});
// default bg canvas color //
renderer.setClearColor(0x7b7b7b);
// use device aspect ratio //
renderer.setPixelRatio(window.devicePixelRatio);
// set size of canvas within window //
renderer.setSize(window.innerWidth, window.innerHeight);
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera( 45, window.innerWidth/window.innerHeight, 0.1, 1000 );
camera.position.z = 5;
var sphere_geometry = new THREE.SphereGeometry(1, 128, 128);
const material = new THREE.MeshPhongMaterial({
color: 0x0000FF,
shininess: 1000,
})
var sphere = new THREE.Mesh(sphere_geometry, material);
scene.add(sphere);
const ambientLight = new THREE.AmbientLight(0x798296)
scene.add(ambientLight)
const directionalLight = new THREE.DirectionalLight(0xffffff, 0.5)
directionalLight.position.set(5, 10, 7)
scene.add(directionalLight);
sphere.geometry.attributes.position.needsUpdate = true;
var update = function() {
// change '0.003' for more aggressive animation
var time = performance.now() * 0.003;
//console.log(time)
//go through vertices here and reposition them
// change 'k' value for more spikes
var k = 1;
const positions = sphere.geometry.attributes.position.array;
for (var i = 0; i < positions.length - 2; i++) {
const v = new THREE.Vector3(
positions[i],
positions[i + 1],
positions[i + 2]
).normalize()
.multiplyScalar(
1 + 0.3 * noise.perlin3(positions[i] * k + time, positions[i + 1] * k,
positions[i + 2] * k));
positions[i] = v.x;
positions[i + 1] = v.y;
positions[i + 2] = v.z;
}
sphere.geometry.attributes.position.needsUpdate = true;
}
function animate() {
sphere.rotation.x += 0.01;
sphere.rotation.y += 0.01;
update();
/* render scene and camera */
renderer.render(scene,camera);
requestAnimationFrame(animate);
}
requestAnimationFrame(animate);html, body {
margin:0;
overflow:hidden
}<script src="https://fariskassim.com/stage/rebel9/teaf/blob/v4/js/perlin.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
<canvas id="canvas"></canvas>