如何让物体点击变色
<template>
<div class="container">
<!-- <h1>创建一个小场景点击变红</h1> -->
<canvas ref="mainCanvas" id="canvas14"></canvas>
</div>
</template>
<script>
import * as THREE from ‘three‘
import utils from ‘./js/utils.js‘
// const OrbitControls = require(‘three-orbit-controls‘)(THREE)
// import MTLLoader from ‘three-mtl-loader‘
// import OBJLoader from ‘three-obj-loader‘
import { OrbitControls } from ‘three/examples/jsm/controls/OrbitControls.js‘
export default {
props: {},
data() {
return {
// 公共项目1
scene: new THREE.Scene(),
camera: null,
renderer: new THREE.WebGLRenderer(), // 渲染器
directionalLight: new THREE.DirectionalLight(0xffffff, 1.0, 0),
controls: OrbitControls,
cars: [],
width: ‘‘,
height: ‘‘,
config: {
isMobile: false,
background: 0x282828
},
// 公共项目2
// 交互
raycaster: new THREE.Raycaster(),
mouse: new THREE.Vector2(),
instersected: null
// 交互
}
},
computed: {},
watch: {},
created() {
},
mounted() {
this.width = window.innerWidth
this.height = window.innerHeight - 50
this.scene = new THREE.Scene()
this.camera = new THREE.PerspectiveCamera(
45, // 视野角fov
this.width / this.height,
1,
5000
)
this.camera.position.set(1200, 1200, 1200) // 调大了可以离的远点看
this.camera.lookAt(this.scene.position)
this.canvas = this.$refs.mainCanvas
this.renderer = new THREE.WebGLRenderer({
antialias: true, // antialias:true/false是否开启反锯齿
canvas: this.canvas
})
document.addEventListener(‘mouseup‘, this.onDocumentMouseUp, false) // 交互
document.addEventListener(‘mousedown‘, this.onDocumentMouseDown, false) // 交互
this.renderer.setSize(this.width, this.height)
this.renderer.setClearColor(this.config.background)
this.renderer.shadowMap.enabled = true // 輔助線
this.renderer.shadowMap.type = THREE.PCFSoftShadowMap // 柔化边缘的软阴影映射
this.checkUserAgent() // 检测浏览器类型
this.bulidAuxSystem() // 构建辅助系统
this.buildLightSystem() // 光线
this.addMash()
this.loop()
},
methods: {
// 交互
onDocumentMouseDown(e) {
console.log(‘1e‘)
console.log(e)
console.log(‘1e.clientX‘)
console.log(e.clientX)
console.log(‘1e.clientY‘)
console.log(e.clientY)
console.log(‘1window.innerWidth‘)
console.log(window.innerWidth)
console.log(‘1window.innerHeight‘)
console.log(window.innerHeight)
},
onDocumentMouseUp(event) {
event.preventDefault()
this.mouse.x = ((event.clientX - 210) / window.innerWidth) * 2 - 1 // 尽量写全屏，要不然不好控制
// this.mouse.y = -((event.clientY - 50) / window.innerHeight) * 2 + 1
this.mouse.y = -(event.clientY / window.innerHeight) * 2 + 1
console.log(‘this.mouse.x‘)
console.log(this.mouse.x)
console.log(‘this.mouse.y‘)
console.log(this.mouse.y)
},
// 交互
addMash() {
const planeGeometry = new THREE.BoxBufferGeometry(1000, 6, 1000)
const plane = utils.makeMesh(‘lambert‘, planeGeometry, 0xe2d5d5)
plane.position.y = -3
this.scene.add(plane)
/**
* 创建网格模型
*/
// 立方体网格模型
var geometry1 = new THREE.BoxGeometry(100, 100, 100)
var material1 = new THREE.MeshLambertMaterial({
color: 0x0000ff, // 材质颜色半透明蓝色
transparent: true, // 开启透明度
opacity: 0.5 // 设置透明度具体值
}) // 材质对象Material
var mesh1 = new THREE.Mesh(geometry1, material1) // 网格模型对象Mesh
mesh1.position.y = 50
this.scene.add(mesh1) // 网格模型添加到场景中
// 球体网格模型
var geometry2 = new THREE.SphereGeometry(60, 40, 40)
var material2 = new THREE.MeshLambertMaterial({
color: 0xff00f,
transparent: true, // 开启透明度
opacity: 0.5 // 设置透明度具体值
})
var mesh2 = new THREE.Mesh(geometry2, material2) // 网格模型对象Mesh
mesh2.translateY(120) // 球体网格模型沿Y轴正方向平移100
this.scene.add(mesh2)
// 圆柱网格模型
var geometry3 = new THREE.CylinderGeometry(50, 50, 100, 25)
var material3 = new THREE.MeshLambertMaterial({
color: 0xffff00,
transparent: true, // 开启透明度
opacity: 0.5 // 设置透明度具体值
})
var mesh3 = new THREE.Mesh(geometry3, material3) // 网格模型对象Mesh
mesh3.translateX(120) // 球体网格模型沿Y轴正方向平移100
mesh3.position.y = 50
this.scene.add(mesh3)
},
// 检测浏览器类型1
checkUserAgent() {
const n = navigator.userAgent
if (
n.match(/Android/i) ||
n.match(/webOs/i) ||
n.match(/iPhone/i) ||
n.match(/iPad/i) ||
n.match(/iPod/i) ||
n.match(/BlackBerry/i)
) {
this.config.isMobile = true
this.camera.position.set(1000, 420, 420)
this.renderer.shadowMap.enabled = false // 輔助線
}
},
// 检测浏览器类型2
// 构建辅助系统1
bulidAuxSystem() {
var axisHelper = new THREE.AxisHelper(250)
this.scene.add(axisHelper)
// const gridHelper = new THREE.GridHelper(1000, 32) // 这里控制表格的大小长宽
// this.scene.add(gridHelper)
this.controls = new OrbitControls(this.camera, this.renderer.domElement)
this.controls.enableDamping = true
this.controls.dampingFactor = 0.25
this.controls.rotateSpeed = 0.35
},
// 构建辅助系统2
buildLightSystem() {
console.log(‘是否手机‘, this.config.isMobile)
if (!this.config.isMobile) {
console.log(‘是否手机11‘)
this.directionalLight.position.set(300, 1000, 500)
this.directionalLight.target.position.set(0, 0, 0)
this.directionalLight.castShadow = true
const d = 300
this.directionalLight.shadow.camera = new THREE.OrthographicCamera(
-d,
d,
d,
-d,
500,
1600
)
this.directionalLight.shadow.bias = 0.0001
this.directionalLight.shadow.mapSize.width = this.directionalLight.shadow.mapSize.height = 1024
this.scene.add(this.directionalLight)
const light = new THREE.AmbientLight(0xffffff, 0.3)
this.scene.add(light)
} else {
console.log(‘是否手机22‘)
const hemisphereLight = new THREE.HemisphereLight(0xffffff, 1)
this.scene.add(hemisphereLight)
this.scene.add(new THREE.AmbientLight(0xffffff, 0.15))
}
},
loop() {
this.renderer.render(this.scene, this.camera)
requestAnimationFrame(this.loop)
this.raycaster.setFromCamera(this.mouse, this.camera)
var intersects = this.raycaster.intersectObjects(this.scene.children)
if (intersects.length > 0) {
if (this.instersected !== intersects[0].object) {
if (this.instersected) {
this.instersected.material.color.setHex(
this.instersected.currentHex
)
}
this.instersected = intersects[0].object
this.instersected.currentHex = this.instersected.material.color.getHex()
this.instersected.material.color.set(0xff0000)
}
} else {
if (this.instersected) {
this.instersected.material.color.set(this.instersected.currentHex)
}
this.instersected = null
}
}
},
beforeDestory() {
this.scene.dispose()
this.controls.dispose()
this.scene = null
this.camera = null
this.directionalLight = null
this.controls = null
this.raycaster = null
this.renderer.dispose()
this.renderer.forceContextLoss()
this.renderer.context = null
this.renderer.domElement = null
this.renderer = null
var canvas = document.getElementById(‘canvas14‘)
var gl = canvas.getContext(‘webgl‘)
gl.getExtension(‘WEBGL_lose_context‘).loseContext()
}
}
</script>
<style scoped lang="less">
</style>