自适应网站模板企业seo算法培训
webgl中线是没有宽度的，现实的应用中一般做法都是将线拓宽成面来绘制。默认threejs的线宽是无法调节的，需要用有厚度的线 THREE.Line2。
先看效果图：
看下代码：
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>Title</title><style>body {width: 100%;height: 100%;}* {margin: 0;padding: 0;}.label {font-size: 20px;color: #000;font-weight: 700;}</style>
</head>
<body>
<div id="container"></div>
<script type="importmap">{"imports": {"three": "../three-155/build/three.module.js","three/addons/": "../three-155/examples/jsm/"}}
</script>
<script type="module">
import * as THREE from 'three';
import Stats from 'three/addons/libs/stats.module.js';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
import { GPUStatsPanel } from 'three/addons/utils/GPUStatsPanel.js';
import { CSS2DRenderer, CSS2DObject } from 'three/addons/renderers/CSS2DRenderer.js';
import { Line2 } from 'three/addons/lines/Line2.js';
import { LineMaterial } from 'three/addons/lines/LineMaterial.js';
import { LineGeometry } from 'three/addons/lines/LineGeometry.js';
let stats, labelRenderer, gpuPanel;
let camera, scene, renderer, controls;
const group = new THREE.Group();
const matLines = [];
let once = true;
init();
initHelp();
initLight();
axesHelperWord();
animate();let data1 = [{x: -50,y: 50,z: 0},{x: 50,y: 50,z: 0},{x: 50,y: -50,z: 0},{x: -50,y: -50,z: 0},{x: -50,y: 50,z: 0}
];let data2 = [{x: -50,y: 0,z: 0},{x: 50,y: 1,z: 0}
];let data3 = [{x: -25,y: 25,z: 0},{x: 25,y: 25,z: 0},{x: 25,y: -25,z: 0},{x: -25,y: -25,z: 0},{x: -25,y: 25,z: 0}
];let positions1 = [];
let positions2 = [];
let positions3 = [];
let colors = [];
let l = data1.length;let color = new THREE.Color();data1.map((v, i) => {positions1.push(v.x, v.y, v.z);color.setHSL(i / l, 1.0, 0.5);colors.push(color.r, color.g, color.b);
});data2.map((v, i) => {positions2.push(v.x, v.y, v.z);color.setHSL(i / l, 1.0, 0.5);colors.push(color.r, color.g, color.b);
});data3.map((v, i) => {positions3.push(v.x, v.y, v.z);
});draw(positions1, colors);
draw(positions2, colors);
drawSolidLine(positions3, '#f00');function draw(positions, colors) {let geometry = new LineGeometry();// 虚线const matLine = new LineMaterial({// 只有白色 可以显示出渐变色的效果color: 0xffffff,linewidth: 10,vertexColors: THREE.VertexColors, // 单独设置顶点颜色//resolution: // renderer.render 时加上这个属性dashed: true,dashSize: 1,gapSize: 1,defines: {USE_DASH: ''}});let line = new Line2(geometry, matLine);line.scale.set(1, 1, 1);line.visible = true;scene.add(line);matLines.push(matLine);geometry.setPositions(positions);geometry.setColors(colors);line.computeLineDistances();
}function drawSolidLine(positions, color) {let geometry = new LineGeometry();// 虚线const matLine = new LineMaterial({// 只有白色 可以显示出渐变色的效果color: color,linewidth: 10,// vertexColors: THREE.VertexColors, // 单独设置顶点颜色// resolution: // renderer.render 时加上这个属性dashed: false});let line = new Line2(geometry, matLine);line.scale.set(1, 1, 1);line.visible = true;line.rotateX(Math.PI / 3);scene.add(line);matLines.push(matLine);geometry.setPositions(positions);line.computeLineDistances();
}function init() {camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 10, 2000 );camera.up.set(0, 1, 0);camera.position.set(60, 40, 60);camera.lookAt(0, 0, 0);scene = new THREE.Scene();scene.background = new THREE.Color( '#ccc' );renderer = new THREE.WebGLRenderer( { antialias: true } );renderer.setPixelRatio( window.devicePixelRatio );renderer.setSize( window.innerWidth, window.innerHeight );document.body.appendChild( renderer.domElement );labelRenderer = new CSS2DRenderer();labelRenderer.setSize( window.innerWidth, window.innerHeight );labelRenderer.domElement.style.position = 'absolute';labelRenderer.domElement.style.top = '0px';labelRenderer.domElement.style.pointerEvents = 'none';document.getElementById( 'container' ).appendChild( labelRenderer.domElement );controls = new OrbitControls( camera, renderer.domElement );// 设置最大最小视距controls.minDistance = 20;controls.maxDistance = 1000;window.addEventListener( 'resize', onWindowResize );stats = new Stats();stats.setMode(1); // 0: fps, 1: msdocument.body.appendChild( stats.dom );gpuPanel = new GPUStatsPanel( renderer.getContext() );stats.addPanel( gpuPanel );stats.showPanel( 0 );scene.add( group );
}function initLight() {const AmbientLight = new THREE.AmbientLight(new THREE.Color('rgb(255, 255, 255)'));scene.add( AmbientLight );
}function initHelp() {// const size = 100;// const divisions = 5;// const gridHelper = new THREE.GridHelper( size, divisions );// scene.add( gridHelper );// The X axis is red. The Y axis is green. The Z axis is blue.const axesHelper = new THREE.AxesHelper( 100 );scene.add( axesHelper );
}function axesHelperWord() {let xP = addWord('X轴');let yP = addWord('Y轴');let zP = addWord('Z轴');xP.position.set(50, 0, 0);yP.position.set(0, 50, 0);zP.position.set(0, 0, 50);
}function addWord(word) {let name = `<span>${word}</span>`;let moonDiv = document.createElement( 'div' );moonDiv.className = 'label';// moonDiv.textContent = 'Moon';// moonDiv.style.marginTop = '-1em';moonDiv.innerHTML = name;const label = new CSS2DObject( moonDiv );group.add( label );return label;
}function onWindowResize() {camera.aspect = window.innerWidth / window.innerHeight;camera.updateProjectionMatrix();renderer.setSize( window.innerWidth, window.innerHeight );
}function animate() {requestAnimationFrame( animate );// 这里请注意 // 把渲染窗口尺寸分辨率传值给材质LineMaterial的resolution属性// resolution属性值会在着色器代码中参与计算if (matLines.length && once) {matLines.forEach(matLine => {matLine.resolution.set(window.innerWidth, window.innerHeight); // resolution of the viewport});once = false;}stats.update();controls.update();labelRenderer.render( scene, camera );renderer.render( scene, camera );
}
</script>
</body>
</html>