通过顶点创建网格
2019-11-07 本文已影响0人
Codifier
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Create a Mesh By Vertexes</title>
<script src="../../three-part/threejs/three.js"></script>
<script src="../../three-part/utils/stats.min.js"></script>
<script src="../../three-part/utils/dat.gui.min.js"></script>
<script src="../controls/TrackballControls.js"></script>
<script src="../util/util.js"></script>
<style>
body {
margin: 0;
overflow: hidden;
}
</style>
</head>
<body>
<div id="container"></div>
<script type="text/javascript">
init();
function init() {
// show FPS
let stats = initStats();
// resize
window.addEventListener('resize', onResize, false);
let scene = new THREE.Scene();
let camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.x = -30;
camera.position.y = 40;
camera.position.z = 30;
camera.lookAt(scene.position);
let renderer = new THREE.WebGLRenderer();
renderer.setClearColor(new THREE.Color(0x000000));
renderer.setSize(window.innerWidth, window.innerHeight);
document.getElementById("container").appendChild(renderer.domElement);
// init trackball control
let trackballControls = initTrackballControls(camera, renderer);
let clock = new THREE.Clock();
let vertices = [
new THREE.Vector3(1,3,1),
new THREE.Vector3(1,3,-1),
new THREE.Vector3(1,-1,1),
new THREE.Vector3(1,-1,-1),
new THREE.Vector3(-1,3,-1),
new THREE.Vector3(-1,3,1),
new THREE.Vector3(-1,-1,-1),
new THREE.Vector3(-1,-1,1)
];
let faces = [
new THREE.Face3(0,2,1),
new THREE.Face3(2,3,1),
new THREE.Face3(4,6,5),
new THREE.Face3(6,7,5),
new THREE.Face3(4,5,1),
new THREE.Face3(5,0,1),
new THREE.Face3(7,6,2),
new THREE.Face3(6,3,2),
new THREE.Face3(5,7,0),
new THREE.Face3(7,2,0),
new THREE.Face3(1,3,4),
new THREE.Face3(3,6,4),
];
let geom = new THREE.Geometry();
geom.vertices = vertices;
geom.faces = faces;
geom.computeFaceNormals();
let material = new THREE.MeshLambertMaterial({
color : 0xff0000
});
let mesh = new THREE.Mesh(geom, material);
scene.add(mesh);
// add a ambient light
let ambientLight = new THREE.AmbientLight(0x3c3c3c);
scene.add(ambientLight);
// add a spot light
let spotLight = new THREE.SpotLight(0xffffff, 1.2, 150, 120);
spotLight.position.set(-40, 60, -10);
spotLight.castShadow = true;
scene.add(spotLight);
// attributes which can be modified in GUI
const controls = {
};
// init GUI
initGUI();
renderScene();
function initGUI(){
let gui = new dat.GUI();
}
function onResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
function renderScene(){
trackballControls.update(clock.getDelta());
stats.update();
requestAnimationFrame(renderScene);
renderer.render(scene, camera);
}
}
</script>
</body>
</html>
运行结果：
