threejs使用Tweenjs结合SpotLight实现动画聚光灯效果

作者:admin
阅读量:141
更新时间:2023-02-12 10:38:15

效果预览:效果预览

源码下载:关注公众号【RMRF】,回复【three6】可获取源码

一、安装

npm install three
1

二、App.vue

<template>
  <div class="index">
    <div id="container"></div>
  </div>
</template>

<script>
import * as THREE from 'three'
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls'
import TWEEN from '@tweenjs/tween.js'
export default {
  data() {
    return {
      scene: null,
      camera: null,
      renderer: null,
      composer: null,
      light: null,
      lightHelper: null,
      light1: null,
      lightHelper1: null,
      light2: null,
      lightHelper2: null
    }
  },
  mounted() {
    this.init()
  },
  methods: {
    init() {
      const el = document.getElementById('container')
      this.initScene()
      this.initCamera()
      this.initRenderer(el)
      this.initCube()
      this.initPlane()
      this.initOrbitControls()
      this.initSpotLight()
      this.render()
      this.animate()
      window.addEventListener('resize', this.onWindowResize)
    },
    initScene() {
      this.scene = new THREE.Scene()
    },
    initCamera() {
      this.camera = new THREE.PerspectiveCamera(
        35,
        window.innerWidth / window.innerHeight,
        1,
        2000
      )
      this.camera.position.set(46, 22, -21)
    },
    initRenderer(el) {
      this.renderer = new THREE.WebGLRenderer({
        antialias: true
      })
      this.renderer.setPixelRatio(window.devicePixelRatio)
      this.renderer.setSize(window.innerWidth, window.innerHeight)
      this.renderer.shadowMap.enabled = true
      el.appendChild(this.renderer.domElement)
    },
    initOrbitControls() {
      let controls = new OrbitControls(this.camera, this.renderer.domElement)
      controls.target.set(0, 7, 0)
      controls.maxPolarAngle = Math.PI / 2
      controls.update()
    },
    render() {
      TWEEN.update()
      this.renderer.render(this.scene, this.camera)
      if (this.lightHelper) {
        this.lightHelper.update()
      }
      if (this.lightHelper1) {
        this.lightHelper1.update()
      }
      if (this.lightHelper2) {
        this.lightHelper2.update()
      }
      requestAnimationFrame(this.render)
    },
    onWindowResize() {
      this.camera.aspect = window.innerWidth / window.innerHeight
      this.camera.updateProjectionMatrix()
      this.renderer.setSize(window.innerWidth, window.innerHeight)
    },
    initCube() {
      const geometry = new THREE.BoxGeometry(3, 3, 3)
      const material = new THREE.MeshPhongMaterial()
      let cube = new THREE.Mesh(geometry, material)
      cube.castShadow = true
      cube.receiveShadow = true
      this.scene.add(cube)
    },
    initPlane() {
      let geometry = new THREE.PlaneGeometry(50, 50)
      let material = new THREE.MeshPhongMaterial({
        color: 0xffffff,
        dithering: true
      })
      let planeMesh = new THREE.Mesh(geometry, material)
      planeMesh.position.set(0, -3, 0)
      planeMesh.receiveShadow = true
      planeMesh.rotation.x = -Math.PI * 0.5
      this.scene.add(planeMesh)
    },
    initSpotLight() {
      const light1 = this.getSpotLight(0xffffff)
      this.scene.add(light1)
      this.light1 = light1
      this.lightHelper1 = new THREE.SpotLightHelper(light1)
      this.scene.add(this.lightHelper1)

      const light2 = this.getSpotLight(0xffff00)
      this.scene.add(light2)
      this.light2 = light2
      this.lightHelper2 = new THREE.SpotLightHelper(light2)
      this.scene.add(this.lightHelper2)
      const anbientLight = new THREE.AmbientLight(0x404040)
      this.scene.add(anbientLight)
    },
    getSpotLight(color) {
      const light = new THREE.SpotLight(color, 1)
      light.castShadow = true
      light.angle = 0.4
      light.penumbra = 0.2
      light.decay = 2
      light.distance = 50
      light.position.set(0, 20, 13)
      return light
    },
    lightTween(light) {
      new TWEEN.Tween(light).to({
        angle: (Math.random() * 0.7) + 0.1,
        penumbra: Math.random() + 1
      }, Math.random() * 3000 + 2000)
        .easing(TWEEN.Easing.Quadratic.Out).start()

      new TWEEN.Tween(light.position).to({
        x: (Math.random() * 30) - 15,
        y: (Math.random() * 10) + 15,
        z: (Math.random() * 30) - 15
      }, Math.random() * 3000 + 2000)
        .easing(TWEEN.Easing.Quadratic.Out).start()
    },
    animate() {
      this.lightTween(this.light1)
      this.lightTween(this.light2)
      setTimeout(this.animate, 5000)
    }
  }
}
</script>

<style>

</style>


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161