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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Helix Globe Prototype</title>
<style type="text/css">
html,
body {
margin: 0;
height: 100%;
}
canvas {
position: absolute;
top: 0;
}
</style>
</head>
<body onload="draw();"></body>
<script src="https://johnson2heng.github.io/three.js-demo/lib/three.js"></script>
<script src="https://johnson2heng.github.io/three.js-demo/lib/js/QuickHull.js"></script>
<script src="https://johnson2heng.github.io/three.js-demo/lib/js/geometries/ConvexGeometry.js"></script>
<script src="https://johnson2heng.github.io/three.js-demo/lib/js/controls/OrbitControls.js"></script>
<script src="https://johnson2heng.github.io/three.js-demo/lib/js/libs/stats.min.js"></script>
<script src="https://johnson2heng.github.io/three.js-demo/lib/js/libs/dat.gui.min.js"></script>
<script>
var renderer;
let points = [];
const pyramids = [];
function initRender() {
renderer = new THREE.WebGLRenderer({ antialias: true });
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
// renderer.setClearColor(0xffff03, 0);
renderer.setClearColor(0xF2F2F2);
}
var camera;
function initCamera() {
camera = new THREE.PerspectiveCamera(
10,
window.innerWidth / window.innerHeight,
1,
10000
);
camera.position.set(0, 0, 600);
}
// CUSTOM CONTROLS to keep planes perpendicular to camera
let n = new THREE.Vector3(); // normal - for re-use
let cpp = new THREE.Vector3(); //coplanar point - for re-use
let plane = new THREE.Plane();
let camPos;
var scene;
function initScene() {
scene = new THREE.Scene();
}
var light;
function initLight() {
scene.add(new THREE.AmbientLight(0xffffff));
light = new THREE.DirectionalLight(0xffffff);
light.position.set(1, 1, 1);
scene.add(light);
}
function initModel() {
generatePoints();
}
//Methods to generate model calls
function generatePoints() {
// Randomly generate a set of vertices
//var points = [];
// ADD in custom LAT/LON points
const N = 72;
const divisions = Math.round(Math.sqrt(N));
const sphereRadius = 48;
points = generateLatLonPoints(divisions, sphereRadius);
function generateLatLonPoints(divisions, radius) {
const points = [];
const latStep = Math.PI / (divisions + 1);
const lonStep = 2 * Math.PI / divisions;
for (let i = 0; i < divisions; i++) {
for (let j = 0; j < divisions; j++) {
const latitude = -Math.PI / 2 + (i + 1) * latStep;
const longitude = j * lonStep;
const x = radius * Math.cos(latitude) * Math.cos(longitude);
const y = radius * Math.cos(latitude) * Math.sin(longitude);
const z = radius * Math.sin(latitude);
points.push(new THREE.Vector3(x, y, z));
}
}
return points;
}
// for (var i = 0; i < 42; i++) {
// //The position of the coordinate point of the xyz axis will be randomly generated within + - 150
// var randomX = -150 + Math.round(Math.random() * 300);
// var randomY = -150 + Math.round(Math.random() * 300);
// var randomZ = -150 + Math.round(Math.random() * 300);
// //Create a coordinate point and add it to the array
// points.push(new THREE.Vector3(randomX, randomY, randomZ));
// }
// randomly updated points in points array
console.log(points);
//Declare a mesh object that holds all points
spGroup = new THREE.Object3D();
//Declare a mesh base material
// var material = new THREE.MeshBasicMaterial({
// color: 0xff0000,
// transparent: false,
// opacity: 0.1,
// });
var materialPink = new THREE.MeshBasicMaterial({
color: 0xF45B83,
transparent: false,
opacity: 0.1,
});
var materialYellow = new THREE.MeshBasicMaterial({
color: 0xF8BE08,
transparent: false,
opacity: 0.1,
});
var materialBlue = new THREE.MeshBasicMaterial({
color: 0x3F4C77,
transparent: false,
opacity: 0.1,
});
var materialGreen = new THREE.MeshBasicMaterial({
color: 0x7ABC71,
transparent: false,
opacity: 0.1,
});
const materials = [materialPink, materialYellow, materialBlue, materialGreen];
let shapeGroup = new THREE.Group();
//Traversing the array to generate small ball points and adding them to the object
points.forEach(function (point) {
var spGeom = new THREE.SphereGeometry(2, 24, 12);
var spMesh = new THREE.Mesh(spGeom, materials[Math.floor(Math.random() * materials.length)]);
spMesh.position.copy(point); //Set the position of the current ball to the coordinates of the current point
scene.add(spMesh);
// function drawTriangle(
// new THREE.Vector3(0, 0, 0),
// new THREE.Vector3(4, 0, 0),
// new THREE.Vector3(2, 3.4641, 0)
// );
// const triangle2 = drawTriangle()
// create just one triangle
const vertices = [
-1, -1, 1, // top
3, -1, -1, // right
1, 2.4641, -1 // left
]
const faces = [
// 0, 1, 2 // only one face
2, 1, 0
]
const geometry = new THREE.PolyhedronGeometry(vertices, faces, 4, 0)
const material = new THREE.MeshNormalMaterial()
material.side = THREE.DoubleSide;
const triangle = new THREE.Mesh(geometry, material)
triangle.position.copy(point);
pyramids.push(triangle)
shapeGroup.add(triangle);
scene.add(shapeGroup);
////////////////////////////////////////
// var radius = 4;
// var height = 5;
// var geometry = new THREE.CylinderGeometry(0, radius, height, 4, 1)
// var material = new THREE.MeshNormalMaterial();
// var pyramid = new THREE.Mesh(geometry, material);
// pyramid.position.copy(point);
// pyramids.push(pyramid)
// scene.add(pyramid);
camPos = camera.position;
});
// Add objects that hold all points to the scene
scene.add(spGroup);
// Use these points to instantiate a THREE.ConvexGeometry Geometry objects
var hullGeometry = new THREE.ConvexGeometry(points);
//Build model
hullMesh = createMesh(hullGeometry);
//Add to scene
scene.add(hullMesh);
console.log("total number points ", points.length);
}
function createMesh(geom) {
console.log('createMesh')
// Instantiate a green, translucent material
var meshMaterial = new THREE.MeshBasicMaterial({
color: 0x000000,
transparent: true,
opacity: 0,
});
meshMaterial.side = THREE.DoubleSide; //Set the material to be visible on both sides
var wireFrameMat = new THREE.MeshBasicMaterial();
wireFrameMat.wireframe = true; //Render materials as wireframes
wireFrameMat.color = new THREE.Color(0x000000);
// Assign both materials to geometry
var mesh = THREE.SceneUtils.createMultiMaterialObject(geom, [
meshMaterial,
wireFrameMat,
]);
return mesh;
}
//Initialize performance plug-ins
var stats;
function initStats() {
stats = new Stats();
document.body.appendChild(stats.dom);
}
//User interaction plug in left mouse button press and hold rotation, right mouse button press and hold translation, scroll wheel zoom
var controls;
function initControls() {
controls = new THREE.OrbitControls(camera, renderer.domElement);
// If you use the animate method, delete this function
//controls.addEventListener( 'change', render );
// Whether there is inertia in the meaning of damping or rotation when the animation is recycled
controls.enableDamping = true;
//Dynamic damping coefficient is the mouse drag rotation sensitivity
//controls.dampingFactor = 0.25;
//Can I zoom
controls.enableZoom = true;
//Auto rotate or not
controls.autoRotate = false;
//Set the maximum distance between the camera and the origin
controls.minDistance = 20;
//Set the maximum distance between the camera and the origin
controls.maxDistance = 1600;
//Enable right drag
controls.enablePan = true;
}
function render() {
renderer.render(scene, camera);
}
//Function triggered by window change
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
render();
renderer.setSize(window.innerWidth, window.innerHeight);
}
function animate() {
const now = Date.now() / 800;
scene.rotation.x = now * .07;
scene.rotation.y = now * .07;
scene.rotation.z = now * .07;
// scene.rotation.y += Math.sin(now) * .03;
// scene.position.y = Math.cos(now) * 3;
//Update controller
controls.update();
//console.log(camera.position)
//Update performance plug-ins
stats.update();
requestAnimationFrame(animate);
//console.log(camera.position)
pyramids.forEach(function (pyramid) {
// console.log(pyramid.position);
// console.log(camera.position)
updateTriangleRotation(pyramid, camera);
////////////////////////////////////////
// pyramidPos = pyramid.position;
// n.subVectors(camPos, pyramidPos).normalize();
// cpp.copy(pyramidPos);
// plane.setFromNormalAndCoplanarPoint(n, cpp);
pyramid.lookAt(camera.position);
});
renderer.render(scene, camera);
}
// function applyMatrixOfMesh(mesh) { // You should apply Matrix of cube and plane
// mesh.updateMatrix();
// mesh.geometry.applyMatrix(mesh.matrix);
// mesh.position.set(0, 0, 0);
// mesh.rotation.set(0, 0, 0);
// mesh.updateMatrix();
// }
function updateTriangleRotation(triangle, camera) {
triangle.lookAt(camera.position);
renderer.render(scene, camera);
}
function draw() {
initRender();
initScene();
initCamera();
initLight();
initModel();
initControls();
initStats();
render();
animate();
window.onresize = onWindowResize;
}
</script>
</html>