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博主的案例並不難，只是爲了更好的給想入門threeJS的同學一點點經驗！！！！！
本章節學習內容的部分代碼和資源從官網案例裏面提取！
涉及的知識點博主已經從three源碼庫裏面摘要出來放在對應的註釋裏面！
今天學習three裏面OBJ模型的加載!
效果圖：
代碼：
<html>
<head>
<title>threeJS17-Loader-OBJ</title>
<style>
body {
background-color: #000;
margin: 0px;
overflow: hidden;
}
#WebGL {
width: 100%;
height: 100%;
position: absolute;
left: 0;
top: 0;
z-index: 999;
}
</style>
</head>
<body>
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.js"></script>
<script src="../../../build/three.js"></script>
<script src="../../js/loaders/DDSLoader.js"></script>
<script src="../../js/loaders/MTLLoader.js"></script>
<script src="../../js/loaders/OBJLoader.js"></script>
<script src="../../js/controls/OrbitControls.js"></script>
<div id="WebGL"></div>
<script>
'use strict';
var container, camera, scene, renderer, geometry, material, animate, controls; //常用變量
var spotLight, mshStdBox; //自定義對象變量
var target = new THREE.Vector3(0, 30, 0);
var model, skeleton;
var webGLW = $('#WebGL').width();
var webGLH = $('#WebGL').height();
var clock = new THREE.Clock();
var mixers = []; //存放動畫數據
init();
animate();
function init() {
container = document.getElementById('WebGL');
scene = new THREE.Scene();
scene.background = new THREE.Color(0xcfcfcf);
scene.fog = new THREE.Fog(0xa0a0a0, 200, 1000); //霧
camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);
camera.position.set(0, 100, 150);
var ambient = new THREE.AmbientLight(0xffffff);
scene.add(ambient);
lights(); //燈光：聚光燈
lightsHelper(spotLight); //燈光顯示助手
plane() //// 地面
Box(); //旋轉的立方體
loadModel(); //添加人物模型
rendererScene(); //場景渲染
OrbitControls(camera, renderer); //OrbitControls控件模塊，90版本鼠標右鍵上下是移動，96版本之後右鍵上下是縮放
window.addEventListener('resize', onWindowResize, false); //監聽屏幕變化
}
function plane() {
// 地面
let grid_mesh = new THREE.Mesh(new THREE.PlaneBufferGeometry(2000, 2000), new THREE.MeshPhongMaterial({
color: 0x999999,
depthWrite: false
}));
grid_mesh.rotation.x = -Math.PI / 2;
grid_mesh.receiveShadow = true;
scene.add(grid_mesh);
var grid = new THREE.GridHelper(2000, 20, 0x000000, 0x000000);
grid.material.opacity = 0.2;
grid.material.transparent = true;
scene.add(grid);
}
function Box() {
// BoxGeometry( width, height, depth, widthSegments, heightSegments, depthSegments )
geometry = new THREE.BoxGeometry(80, 5, 80, 3, 3, 3);
var matStdObjects = new THREE.MeshStandardMaterial({
color: 0xA0cf00,
roughness: 0,
metalness: 0.6
});
mshStdBox = new THREE.Mesh(geometry, matStdObjects);
mshStdBox.position.set(0, -5, 0);
mshStdBox.rotation.set(0, Math.PI / 2.0, 0);
mshStdBox.castShadow = true;
mshStdBox.receiveShadow = true;
scene.add(mshStdBox);
}
function lights() {
// SpotLight( color：顏色, intensity：強度, distance：發光距離, angle：角度, penumbra：邊緣範圍, decay：衰減 )
spotLight = new THREE.SpotLight(0xffffff, 1);
spotLight.position.set(10, 120, 30);
spotLight.angle = Math.PI / 4;
spotLight.penumbra = 0.05; //邊緣範圍，反比
spotLight.decay = 2; //衰減係數，反比
spotLight.distance = 400; //發光距離
spotLight.castShadow = true; //陰影
spotLight.shadow.mapSize.width = 1024;
spotLight.shadow.mapSize.height = 1024;
spotLight.shadow.camera.near = 10; //近截面
spotLight.shadow.camera.far = 250;
scene.add(spotLight);
}
function lightsHelper(lightsObject) {
// 聚光燈顯示助手SpotLightHelper( light:燈光, color：顏色 )
var lightHelper = new THREE.SpotLightHelper(lightsObject, 0xdfdfdf);
scene.add(lightHelper);
var mesh = new THREE.Mesh(new THREE.PlaneBufferGeometry(200, 200), new THREE.MeshPhongMaterial({
color: 0x9cfcf99,
depthWrite: false
}));
mesh.rotation.x = -Math.PI / 2;
mesh.position.set(0, -20, 0)
mesh.receiveShadow = true;
scene.add(mesh);
}
function loadModel() {//加載obj模型
var onProgress = function (xhr) { //加載的進度
if (xhr.lengthComputable) {
var percentComplete = xhr.loaded / xhr.total * 100;
console.log(Math.round(percentComplete, 2) + '% downloaded');
}
};
var onError = function () { //加載錯誤
console.log('加載出問題啦');
};
THREE.Loader.Handlers.add(/\.dds$/i, new THREE.DDSLoader());
new THREE.MTLLoader()
.setPath('../../models/obj/male02/')
.load('male02_dds.mtl', function (materials) {
materials.preload();
new THREE.OBJLoader()
.setMaterials(materials)
.setPath('../../models/obj/male02/')
.load('male02.obj', function (object) {
object.scale.set(0.5, 0.5, 0.5);
object.traverse(function (child) {
if (child.isMesh) {//開啓陰影
child.castShadow = true;
child.receiveShadow = true;
}
});
scene.add(object);
}, onProgress, onError);
});
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
function rendererScene() {
renderer = new THREE.WebGLRenderer({
antialias: true
});
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = THREE.PCFSoftShadowMap;
renderer.gammaInput = true;
renderer.gammaOutput = true;
container.appendChild(renderer.domElement);
}
function OrbitControls(camera, renderer) {
//OrbitControls控件操作模塊
controls = new THREE.OrbitControls(camera, renderer.domElement);
controls.target = target; //控制的target
controls.autoRotate = true; //是否自動旋轉
controls.autoRotateSpeed = 0.5; //自動旋轉速度，正比
}
function animate() {
requestAnimationFrame(animate);
if (controls) controls.update();
mshStdBox.rotation.y += 0.01;
// if (mixers.length > 0) {
// for (var i = 0; i < mixers.length; i++) {
// mixers[i].update(clock.getDelta());
// }
// }
renderer.render(scene, camera);
};
</script>
</body>
</html>