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Simple implementation of a fibonacci sphere in ThreeJS
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset=utf-8> | |
<title>Fibonacci Sphere in ThreeJS</title> | |
<style> | |
body { | |
margin: 0; | |
} | |
canvas { | |
width: 100%; | |
height: 100% | |
} | |
</style> | |
</head> | |
<body> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/89/three.min.js"></script> | |
<script> | |
var numberOfPoints = 1500; | |
var radiusOfSphere = 30; | |
var fibonacciSpherePoints = getFibonacciSpherePoints(numberOfPoints, radiusOfSphere); | |
initSceneAndAddFibonacciSphere(fibonacciSpherePoints); | |
function getFibonacciSpherePoints(samples, radius, randomize) { | |
// Translated from Python from https://stackoverflow.com/a/26127012 | |
samples = samples || 1; | |
radius = radius || 1; | |
randomize = randomize || true; | |
var random = 1; | |
if (randomize === true) { | |
random = Math.random() * samples; | |
} | |
var points = [] | |
var offset = 2 / samples | |
var increment = Math.PI * (3 - Math.sqrt(5)); | |
for (var i = 0; i < samples; i++) { | |
var y = ((i * offset) - 1) + (offset / 2); | |
var distance = Math.sqrt(1 - Math.pow(y, 2)); | |
var phi = ((i + random) % samples) * increment; | |
var x = Math.cos(phi) * distance; | |
var z = Math.sin(phi) * distance; | |
x = x * radius; | |
y = y * radius; | |
z = z * radius; | |
var point = { | |
'x': x, | |
'y': y, | |
'z': z | |
} | |
points.push(point); | |
} | |
return points; | |
} | |
function initSceneAndAddFibonacciSphere(fibonacciSpherePoints) { | |
var scene = new THREE.Scene(); | |
scene.fog = new THREE.Fog(0xffffff, 70, 135); | |
scene.background = new THREE.Color(0xffffff); | |
camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 500); | |
camera.position.set(0, 0, 100); | |
camera.lookAt(new THREE.Vector3(0, 0, 0)); | |
var renderer = new THREE.WebGLRenderer(); | |
renderer.setSize(window.innerWidth, window.innerHeight); | |
document.body.appendChild(renderer.domElement); | |
for (var i = 0; i < fibonacciSpherePoints.length; i++) { | |
var point = fibonacciSpherePoints[i]; | |
var radius = 0.2; | |
var geometry = new THREE.SphereGeometry(radius); | |
var material = new THREE.MeshBasicMaterial({ color: 0x59673C }); | |
var sphere = new THREE.Mesh(geometry, material); | |
sphere.position.x = point.x; | |
sphere.position.y = point.y; | |
sphere.position.z = point.z; | |
scene.add(sphere); | |
} | |
renderer.render(scene, camera); | |
} | |
</script> | |
</body> | |
</html> |
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