three.js学习：三维空间下的直线 -云博客

three.js学习：三维空间下的直线

# 前端 2024-05-05 02:07 0 41 来源：云博客

index.html

<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>测试</title> <script src="js/three.min.js"></script> <style> html, body { width: 100%; height: 100%; margin: 0; padding: 0; /*background-color: blue;*/ } </style></head><body><canvas></canvas></body><script src="js/chapter2.1.js"></script></html>

chapter2.1.js

1、步骤概述：初始化渲染器 > 初始化相机 > 初始化场景 > 建立几何图形并添加到场景中 > 渲染

function threeStart() { initThree();  initCamera(); initScene(); initObject(); renderer.clear(); renderer.render(scene, camera);}threeStart();

2、初始化渲染器

var canvas = document.querySelector("canvas");canvas.width = window.innerWidth;canvas.height = window.innerHeight;var renderer;function initThree() { renderer = new THREE.WebGLRenderer({ canvas : canvas, antialias : true }); renderer.setSize(window.innerWidth, window.innerHeight); renderer.setClearColor(0xffffff, 1);}

3、初始化相机

var camera;function initCamera() { camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000); camera.position.x = 0; camera.position.y = 0; camera.position.z = 1000; camera.up.x = 0; camera.up.y = 1; camera.up.z = 0; camera.lookAt(0, 0, 0);}

4、初始化场景

var scene;function initScene () { scene = new THREE.Scene();}

5、生成几何图行并添加到场景中

var line;function initObject() { //定义两个顶点 var p1 = new THREE.Vector3(-100, -100, 0); var p2 = new THREE.Vector3(100, 100, 0); var geometry = new THREE.Geometry(); var material = new THREE.LineBasicMaterial({vertexColors:THREE.VertexColors }); geometry.vertices.push(p1); geometry.vertices.push(p2); var color1 = new THREE.Color( 0x444444 ), color2 = new THREE.Color( 0xFF0000 ); geometry.colors.push(color1, color2); line = new THREE.Line(geometry, material, THREE.LineSegments); scene.add(line);}