小程序使用three.js开发VR场景漫游
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下载所需要文件,参考:GitHub - yannliao/threejs-example-for-miniprogram: 这是一个 three.js 在微信小程序里的使用示例
引入js文件
import * as THREE from '../../libs/three.weapp.js'
import * as TWEEN from '../../libs/tween.umd.js'
import OrbitControls from '../../jsm/controls/OrbitControls'
var isRotate = true //自动旋转
var canvas,camera,renderer,controls,scene,new_scene,geometry,texture,material,mesh //3d参数
var canvas_2d,ctx_2d //平面画板参数
var tagMeshs=[],currentTag=0 //标记参数
初始化3d场景
initThreeD()
let that = this
let picture = this.data.images[this.data.current].thumb_src
wx.createSelectorQuery()
.select('#c')
.node()
.exec((res) =>
let canvasId = res[0].node._canvasId
canvas = THREE.global.registerCanvas(canvasId, res[0].node)
this.setData( canvasId )
camera = new THREE.PerspectiveCamera(70, canvas.width / canvas.height, 1, 1000);
//camera.position.z = 560;//100
camera.position.set(0,500,600)
scene = new THREE.Scene();
scene.background = new THREE.Color('#F0FFFF');
renderer = new THREE.WebGLRenderer( antialias: true );
controls = new OrbitControls(camera, renderer.domElement);
controls.autoRotateSpeed = 1.0
controls.enableDamping = true;
controls.dampingFactor = 0.25;
controls.enableZoom = true;
controls.maxZoom = 2.0
controls.update();
geometry = new THREE.SphereGeometry( 200,30,50);
geometry.scale(-1,1,1)
texture = new THREE.TextureLoader().load(picture);
material = new THREE.MeshBasicMaterial( map: texture );
mesh = new THREE.Mesh(geometry, material);
scene.add(mesh);
function onWindowResize()
camera.aspect = wx.getSystemInfoSync().screenWidth / wx.getSystemInfoSync().screenHeight;
camera.updateProjectionMatrix();
renderer.setSize(canvas.width, canvas.height);
function render()
canvas.requestAnimationFrame(render);
// mesh.rotation.x += 0.01;
controls.autoRotate = isRotate
if(isRotate)
//mesh.rotation.y += 0.001;
//controls.autoRotate = true // 是否自动旋转
controls.update()
TWEEN.update()
//that.updateTags() //更新标记
renderer.render(scene, camera);
render()
that.init2d()//初始化2d-canvas画板
//初始动画
setTimeout(function()
that.startAnimation()
,1000)
//监听窗口变化
wx.onWindowResize((result) =>
onWindowResize()
)
)
初始化光源
nitLight()
let ambientLight;
let directionalLight;
ambientLight = new THREE.AmbientLight(0xffffff);
scene.add(ambientLight);
directionalLight = new THREE.DirectionalLight(0xffffff, 0.2);
directionalLight.position.set(-50, 50, 10);
directionalLight.castShadow = true;
directionalLight.shadow.mapSize.width = 1024;
directionalLight.shadow.mapSize.height = 1024;
// 为光线设置阴影属性
directionalLight.shadow.camera.left = -50;
directionalLight.shadow.camera.right = 50;
directionalLight.shadow.camera.top = 50;
directionalLight.shadow.camera.bottom = -50;
directionalLight.shadow.camera.far = 3500;
// 偏差率
directionalLight.shadow.bias = -0.001;
scene.add(directionalLight);
// let directionalLightHelper = new THREE.DirectionalLightHelper(directionalLight, 10);
// scene.add(directionalLightHelper);
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