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function init() { |
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const container = document.getElementById('globe') |
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const canvas = container.getElementsByTagName('canvas')[0] |
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const width = 1000 |
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const height = 800 |
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const globeRadius = 200 |
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const globeSegments = 64 |
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const globeWidth = 4098 / 2 |
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const globeHeight = 1968 / 2 |
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const groups = { |
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globe: null, |
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globePoints: null, |
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tracePoints: null, |
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} |
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let data, scene, renderer, globe |
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const camera = { |
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object: null, |
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orbitControls: null, |
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angles: { |
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current: { |
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azimuthal: null, |
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polar: null, |
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}, |
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target: { |
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azimuthal: null, |
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polar: null, |
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}, |
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}, |
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transition: { |
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current: 0, |
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target: 30, |
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}, |
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} |
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function setup() { |
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scene = new THREE.Scene() |
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camera.object = new THREE.PerspectiveCamera(45, width / height, 1, 4000) |
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camera.object.position.z = -400 |
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renderer = new THREE.WebGLRenderer({ |
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canvas: canvas, |
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antialias: true, |
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opacity: 1, |
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}) |
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renderer.setSize(width, height) |
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setupGlobe() |
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setupOrbitControls() |
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render() |
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} |
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setup() |
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function setupGlobe() { |
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const canvasSize = 128 |
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const textureCanvas = document.createElement('canvas') |
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textureCanvas.width = canvasSize |
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textureCanvas.height = canvasSize |
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const canvasContext = textureCanvas.getContext('2d') |
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canvasContext.rect(0, 0, canvasSize, canvasSize) |
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const texture = new THREE.Texture(textureCanvas) |
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const geometry = new THREE.SphereGeometry( |
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globeRadius, |
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globeSegments, |
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globeSegments |
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) |
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const material = new THREE.MeshBasicMaterial({ |
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map: texture, |
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transparent: true, |
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opacity: 0.5, |
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}) |
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globe = new THREE.Mesh(geometry, material) |
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groups.globe = globe |
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groups.globe.name = 'Globe' |
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scene.add(groups.globe) |
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addPoints() |
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} |
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function addPoints() { |
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const mergedGeometry = new THREE.Geometry() |
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const pingGeometry = new THREE.SphereGeometry(0.5, 5, 5) |
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const material = new THREE.MeshBasicMaterial({ |
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color: '#626177', |
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}) |
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for (let point of pointdata.points) { |
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const pos = convertFlatCoordsToSphereCoords(point.x, point.y) |
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if (pos.x && pos.y && pos.z) { |
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pingGeometry.translate(pos.x, pos.y, pos.z) |
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mergedGeometry.merge(pingGeometry) |
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pingGeometry.translate(-pos.x, -pos.y, -pos.z) |
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} |
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} |
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const total = new THREE.Mesh(mergedGeometry, material) |
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groups.globePoints = total |
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groups.globePoints.name = 'Globe Points' |
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scene.add(groups.globePoints) |
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} |
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function addTracePoints(tracepoints) { |
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const mergedGeometry = new THREE.Geometry() |
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const pingGeometry = new THREE.SphereGeometry(1.9, 5, 5) |
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const material = new THREE.MeshBasicMaterial({ |
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color: '#FF0000', |
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}) |
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for (let point of tracepoints.points) { |
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const pos = convertLatLngToSphereCoords(point.x, point.y) |
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if (pos.x && pos.y && pos.z) { |
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pingGeometry.translate(pos.x, pos.y, pos.z) |
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mergedGeometry.merge(pingGeometry) |
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// Reset ping item position.
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pingGeometry.translate(-pos.x, -pos.y, -pos.z) |
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} |
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} |
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const total = new THREE.Mesh(mergedGeometry, material) |
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groups.tracePoints = total |
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groups.tracePoints.name = 'Trace Points' |
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scene.add(groups.tracePoints) |
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groups.tracePoints.rotation.y = groups.globePoints.rotation.y |
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} |
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init.addTracePoints = addTracePoints; |
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function convertLatLngToSphereCoords(latitude, longitude) { |
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const phi = (latitude * Math.PI) / 180 |
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const theta = ((longitude - 180) * Math.PI) / 180 |
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const x = -(globeRadius + -1) * Math.cos(phi) * Math.cos(theta) |
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const y = (globeRadius + -1) * Math.sin(phi) |
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const z = (globeRadius + -1) * Math.cos(phi) * Math.sin(theta) |
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return new THREE.Vector3(x, y, z) |
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} |
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function convertFlatCoordsToSphereCoords(x, y) { |
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// Convert latitude and longitude on the 90/180 degree axis.
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let latitude = ((x - globeWidth) / globeWidth) * -180 |
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let longitude = ((y - globeHeight) / globeHeight) * -90 |
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const radius = Math.cos(longitude) * globeRadius |
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const targetX = Math.cos(latitude) * radius |
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const targetY = Math.sin(longitude) * globeRadius |
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const targetZ = Math.sin(latitude) * radius |
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return { |
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x: targetX, |
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y: targetY, |
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z: targetZ, |
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} |
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} |
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function convertLatLngToFlatCoords(latitude, longitude) { |
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const x = Math.round((longitude + 180) * (globeWidth / 360)) * 2 |
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const y = Math.round((-1 * latitude + 90) * (globeHeight / 180)) * 2 |
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return { x, y } |
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} |
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function getProjectedPosition( |
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width, |
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height, |
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position, |
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contentWidth, |
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contentHeight |
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) { |
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position = position.clone() |
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var projected = position.project(camera.object) |
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return { |
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x: projected.x * width + width - contentWidth / 2, |
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} |
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} |
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function returnCameraAngles(x, y) { |
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let targetAzimuthalAngle = ((x - globeWidth) / globeWidth) * Math.PI |
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targetAzimuthalAngle = targetAzimuthalAngle + Math.PI / 2 |
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let targetPolarAngle = (y / (globeHeight * 2)) * Math.PI |
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return { |
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azimuthal: targetAzimuthalAngle, |
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polar: targetPolarAngle, |
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} |
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} |
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function convertLatLngToSphereCoords(latitude, longitude) { |
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const phi = (latitude * Math.PI) / 180 |
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const theta = ((longitude - 180) * Math.PI) / 180 |
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const x = -(globeRadius + -1) * Math.cos(phi) * Math.cos(theta) |
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const y = (globeRadius + -1) * Math.sin(phi) |
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const z = (globeRadius + -1) * Math.cos(phi) * Math.sin(theta) |
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return new THREE.Vector3(x, y, z) |
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} |
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function easeInOutCubic(t) { |
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return t < 0.5 ? 4 * t * t * t : (t - 1) * (2 * t - 2) * (2 * t - 2) + 1 |
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} |
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function getRandomNumberBetween(min, max) { |
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return Math.floor(Math.random() * (max - min + 1) + min) |
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} |
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function setupOrbitControls() { |
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camera.orbitControls = new THREE.OrbitControls(camera.object, canvas) |
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camera.orbitControls.enableKeys = false |
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camera.orbitControls.enablePan = false |
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camera.orbitControls.enableZoom = false |
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camera.orbitControls.enableDamping = false |
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camera.orbitControls.enableRotate = false |
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camera.object.position.z = -550 |
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camera.orbitControls.update() |
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} |
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function render() { |
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renderer.render(scene, camera.object) |
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requestAnimationFrame(render) |
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groups.globePoints.rotation.y += 0.01 |
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if (groups.tracePoints !== null) { |
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groups.tracePoints.rotation.y += 0.01 |
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} |
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} |
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} |
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