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index.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Add a 3D model</title>
<meta
name="viewport"
content="initial-scale=1,maximum-scale=1,user-scalable=no"
/>
<script src="https://api.tiles.mapbox.com/mapbox-gl-js/v1.6.0/mapbox-gl.js"></script>
<link
href="https://api.tiles.mapbox.com/mapbox-gl-js/v1.6.0/mapbox-gl.css"
rel="stylesheet"
/>
<style>
body {
margin: 0;
padding: 0;
}
#map {
position: absolute;
top: 0;
bottom: 0;
width: 100%;
}
</style>
</head>
<body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r118/three.min.js"></script>
<script id="vertexShader" type="x-shader/x-vertex">
varying vec2 vUv;
void main() {
vUv = uv;
gl_Position = projectionMatrix * (modelViewMatrix * vec4( position, 1.0 ));
}
</script>
<script id="fragmentShader" type="x-shader/x-fragment">
varying vec2 vUv;
uniform float iTime;
uniform vec3 color;
void main() {
vec2 uv = -1.0 + 2.0 * vUv;
float time = iTime * 0.3 + 0.0*0.01;
// To create the BG pattern
vec3 wave_color = vec3(0.0);
// To create the waves
float wave_width = 0.01;
uv.y -= 0.8;
for(float i = 0.0; i < 5.0; i++) {
// uv.y += cos(i * 2.0 + iTime ) > 0.0 ? sin(i * 2.0 + iTime ) : -sin(i * 2.0 + iTime ) ;
// 控制线条运动方式。 sin 内部控制速度 外面控制幅度
uv.y += sin(i * 2.3 + iTime ) * 1.0 ;
// 控制线条宽度
wave_width = abs(1.0 / (40.0 * uv.y));
wave_color += vec3(wave_width , wave_width * 3.9, wave_width * 4.5);
}
gl_FragColor = vec4(wave_color, ((wave_color.r + wave_color.g + wave_color.b) / 4.0) - 0.2);
}
</script>
<div id="map"></div>
<script>
var uniforms = {
iTime: {
type: 'f',
value: 1.0
}
}
function findOrigin(pointArr) {
let min = pointArr.reduce((min, item, index) => {
if (item.lt < min) {
min = item.lt
}
return min
}, pointArr[0].lt)
// 多个维度相同的情况
let minItems = pointArr
.filter(i => i.lt == min)
.sort((a, b) => a.ln - b.ln)[0]
return minItems
}
const ali = [
{ ln: 120.18669699897104, lt: 30.195734047408006 },
{ ln: 120.18481867562849, lt: 30.19657615976094 },
{ ln: 120.18359146384691, lt: 30.19639727074671 },
{ ln: 120.1843631355107, lt: 30.190991367324166 },
{ ln: 120.18775940533932, lt: 30.1911974675611 }
]
const { ln: minln, lt: minlt } = findOrigin(ali)
const relativePosition = ali.map(item => {
return {
ln: (item.ln - minln) * 10000,
lt: (item.lt - minlt) * 10000
}
})
const center = ali
.reduce(
(a, b) => {
a[0] = a[0] + b.ln
a[1] = a[1] + b.lt
return a
},
[0, 0]
)
.map(i => i / ali.length)
mapboxgl.accessToken =
'pk.eyJ1IjoibXlzb21lIiwiYSI6ImNrMzhkeGM3cTAxM2czZHFldmxkOWQ3N2gifQ.LHODCWg-jAbqBZmOOHtnqQ'
var map = (window.map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mysome/ck47tr3xs01n61cmdku8zmw9a',
zoom: 18,
center: center,
pitch: 60,
antialias: true // create the gl context with MSAA antialiasing, so custom layers are antialiased
}))
// parameters to ensure the model is georeferenced correctly on the map
var modelOrigin = [minln, minlt] // 最大x 最小y
// var modelOrigin = [120.18775940533932, 30.1911974675611]
var modelAltitude = 0
var modelRotate = [Math.PI / 2, 0, 0]
var modelAsMercatorCoordinate = mapboxgl.MercatorCoordinate.fromLngLat(
modelOrigin,
modelAltitude
)
// transformation parameters to position, rotate and scale the 3D model onto the map
var modelTransform = {
translateX: modelAsMercatorCoordinate.x,
translateY: modelAsMercatorCoordinate.y,
translateZ: modelAsMercatorCoordinate.z,
rotateX: modelRotate[0],
rotateY: modelRotate[1],
rotateZ: modelRotate[2],
/* Since our 3D model is in real world meters, a scale transform needs to be
* applied since the CustomLayerInterface expects units in MercatorCoordinates.
*/
scale: modelAsMercatorCoordinate.meterInMercatorCoordinateUnits()
}
var THREE = window.THREE
// configuration of the custom layer for a 3D model per the CustomLayerInterface
var customLayer = {
id: '3d-model',
type: 'custom',
renderingMode: '3d',
onAdd: function(map, gl) {
this.camera = new THREE.Camera()
this.scene = new THREE.Scene()
var axesHelper = new THREE.AxesHelper(800)
this.scene.add(axesHelper)
// create two three.js lights to illuminate the model
var directionalLight = new THREE.DirectionalLight(0xffffff)
directionalLight.position.set(0, -70, 100).normalize()
this.scene.add(directionalLight)
var directionalLight2 = new THREE.DirectionalLight(0xffffff)
directionalLight2.position.set(0, 70, 100).normalize()
this.scene.add(directionalLight2)
this.map = map
getShapN(this.scene)
// use the Mapbox GL JS map canvas for three.js
this.renderer = new THREE.WebGLRenderer({
canvas: map.getCanvas(),
context: gl,
antialias: true
})
this.renderer.autoClear = false
},
render: function(gl, matrix) {
var rotationX = new THREE.Matrix4().makeRotationAxis(
new THREE.Vector3(1, 0, 0),
modelTransform.rotateX
)
var rotationY = new THREE.Matrix4().makeRotationAxis(
new THREE.Vector3(0, 1, 0),
modelTransform.rotateY
)
var rotationZ = new THREE.Matrix4().makeRotationAxis(
new THREE.Vector3(0, 0, 1),
modelTransform.rotateZ
)
var m = new THREE.Matrix4().fromArray(matrix)
var l = new THREE.Matrix4()
.makeTranslation(
modelTransform.translateX,
modelTransform.translateY,
modelTransform.translateZ
)
.scale(
new THREE.Vector3(
modelTransform.scale,
-modelTransform.scale,
modelTransform.scale
)
)
.multiply(rotationX)
.multiply(rotationY)
.multiply(rotationZ)
this.camera.projectionMatrix = m.multiply(l)
this.renderer.state.reset()
uniforms.iTime.value += 0.05
this.renderer.render(this.scene, this.camera)
this.map.triggerRepaint()
}
}
map.on('style.load', function() {
map.addLayer(customLayer, 'waterway-label')
})
function getShapN(scene) {
// var material = new THREE.MeshBasicMaterial({
// color: 0xffff00,
// side: THREE.DoubleSide
// })
var material = new THREE.ShaderMaterial({
uniforms: uniforms,
transparent: true,
side: 2,
vertexShader: document.getElementById('vertexShader').textContent,
fragmentShader: document.getElementById('fragmentShader').textContent
})
let wareGroup = new THREE.Group()
let height = 10
// 形状的坐标数据
const shapArr = relativePosition
for (let index = 0; index < shapArr.length; index++) {
const item = shapArr[index]
const nextItem =
index + 1 == shapArr.length ? shapArr[0] : shapArr[index + 1]
// 计算出两点的距离
const length = getTwoPointLength(item, nextItem)
// 根据形状构建mesh
let mesh = new THREE.Mesh(
new THREE.PlaneGeometry(length, height),
material
)
// 获取到两点之间，中心点的坐标
const pos = getMiddlePos(item, nextItem)
// 计算出两点之间的旋转角度
const roate = Math.asin((nextItem.ln - pos.ln) / (length / 2))
console.log(item, nextItem, pos)
// 设置mesh的坐标
mesh.position.x = pos.ln
mesh.position.z = pos.lt
mesh.position.y = height / 2
if (nextItem.lt - pos.lt > 0) {
mesh.rotation.y = Math.PI / 2 + roate
} else {
mesh.rotation.y = Math.PI / 2 - roate
}
wareGroup.add(mesh)
}
let beishu = 5
wareGroup.scale.x = 10
wareGroup.scale.z = 11
wareGroup.scale.y = beishu
// 镜像反转
wareGroup.rotation.x = Math.PI * -1
wareGroup.position.y = beishu * height
scene.add(wareGroup)
}
function getTwoPointLength(a, b) {
// 勾股定理
let width = Math.abs(a.ln - b.ln)
let height = Math.abs(a.lt - b.lt)
return Math.hypot(width, height)
}
function getMiddlePos(a, b) {
return {
ln: (a.ln + b.ln) / 2,
lt: (a.lt + b.lt) / 2
}
}
</script>
</body>
</html>