[游戏开发]关于ThreeJs纹理贴图动画的实现

效果图：实际效果，图中的贴图是可以动的

一、准备工作

1、静态文件

2、首先你要引入相关依赖：

threejs核心依赖: http://www.yanhuangxueyuan.com/versions/threejsR92/build/three.min.js

兼容检测器: http://www.yanhuangxueyuan.com/versions/threejsR92/build/three.min.js

运行帧数监测器: http://www.yanhuangxueyuan.com/versions/threejsR92/examples/js/libs/stats.min.js

轨道控制器: http://www.yanhuangxueyuan.com/versions/threejsR92/examples/js/libs/stats.min.js

3、 接下来从Vue项目中的运用来说, 以上依赖库，可以在 public/index.html中引入，也可以下载到项目本地，然后再main.js中import引入

二、下面开始编写代码

1. 首先你需要在页面中准备好一个DOM容器, 如下

<div id="ThreeJS"></div>

2. 创建变量

data() {
  return {
    scene: null, // 场景对象
    camera: null, // 相机对象
    renderer: null, // 渲染对象
    controls: null, // 轨道控制器
    stats: null // 运行帧数监测器
  }
}

3. 调用时需要在页面DOM挂载完成时再调用

mounted() {
  this.init()
}

4. 功能函数

methods: {
  init() {
    // 设置全局变量，这些变量你可以写在这里，当然也可以写在 data 函数中
    var scene, renderer, camera, annie, boomer;
    // 创建时钟
    var clock = new THREE.Clock();
    // 获取渲染容器
    var container = document.getElementById("ThreeJS");
    // 场景设置
    scene = new THREE.Scene();
    // 相机设置
    var SCREEN_WIDTH = window.innerWidth,
      SCREEN_HEIGHT = window.innerHeight;
    var VIEW_ANGLE = 45,
      ASPECT = SCREEN_WIDTH / SCREEN_HEIGHT,
      NEAR = 0.1,
      FAR = 20000;
    camera = new THREE.PerspectiveCamera(
      VIEW_ANGLE,
      ASPECT,
      NEAR,
      FAR
    );
    // 相机添加如场景
    scene.add(camera);
    // 相机位置定位
    camera.position.set(0, 150, 400);
    // 设置相机照向的位置为: scene.position(场景的方向)
    camera.lookAt(scene.position);
    // 兼容类型监测
    if (!Detector.webgl) return alert('不支持')
    renderer = new THREE.WebGLRenderer({
      antialias: true,
    })
    renderer = new THREE.CanvasRenderer();
    renderer.setSize(SCREEN_WIDTH, SCREEN_HEIGHT);
    container.appendChild(renderer.domElement);
    // 轨道控制器
    controls = new THREE.OrbitControls(
      camera,
      renderer.domElement
    );
    // 运行帧数监测器
    stats = new Stats();
    stats.domElement.style.position = "absolute";
    stats.domElement.style.bottom = "0px";
    stats.domElement.style.zIndex = 100;
    container.appendChild(stats.domElement);
    // 设置灯光
    var light = new THREE.PointLight(0xffffff);
    light.position.set(0, 250, 0);
    scene.add(light);
    // 地平面纹理贴图
    var floorTexture = new THREE.ImageUtils.loadTexture(
      "images/checkerboard.jpg"
    );
    // 设置阵列模式为: THREE.RepeatWrapping
    floorTexture.wrapS = floorTexture.wrapT = THREE.RepeatWrapping;
    floorTexture.repeat.set(10, 10);
    var floorMaterial = new THREE.MeshBasicMaterial({
      map: floorTexture,
      side: THREE.DoubleSide,
    });
    var floorGeometry = new THREE.PlaneGeometry(1000, 1000, 10, 10);
    var floor = new THREE.Mesh(floorGeometry, floorMaterial);
    floor.position.y = -0.5;
    floor.rotation.x = Math.PI / 2;
    scene.add(floor);
    // SKYBOX/FOG
    var skyBoxGeometry = new THREE.CubeGeometry(10000, 10000, 10000);
    var skyBoxMaterial = new THREE.MeshBasicMaterial({
      color: 0x9999ff,
      side: THREE.BackSide,
    });
    var skyBox = new THREE.Mesh(skyBoxGeometry, skyBoxMaterial);
    // scene.add(skyBox);
    scene.fog = new THREE.FogExp2(0x9999ff, 0.00025);

    // 网格与纹理动画
    var runnerTexture = new THREE.ImageUtils.loadTexture(
      "images/run.png"
    );
    // 参数说明：材质, 水平排列, 垂直平铺, 图片中有几个动作, 持续时间.
    annie = new TextureAnimator(runnerTexture, 10, 1, 10, 75);
    var runnerMaterial = new THREE.MeshBasicMaterial({
      map: runnerTexture,
      side: THREE.DoubleSide,
    });
    var runnerGeometry = new THREE.PlaneGeometry(50, 50, 1, 1);
    var runner = new THREE.Mesh(runnerGeometry, runnerMaterial);
    runner.position.set(-100, 25, 0);
    scene.add(runner);

    var explosionTexture = new THREE.ImageUtils.loadTexture(
      "images/explosion.jpg"
    );
    // 参数说明：材质, 水平排列, 垂直平铺, 图片中有几个动作, 持续时间.
    boomer = new TextureAnimator(explosionTexture, 4, 4, 16, 55);
    var explosionMaterial = new THREE.MeshBasicMaterial({
      map: explosionTexture,
    });
    var cubeGeometry = new THREE.CubeGeometry(50, 50, 50);
    var cube = new THREE.Mesh(cubeGeometry, explosionMaterial);
    cube.position.set(0, 26, 0);
    scene.add(cube);

    // 纹理更新函数
    function update() {
      var delta = clock.getDelta();
      annie.update(1000 * delta);
      boomer.update(1000 * delta);
      controls.update();
      stats.update();
    }

    // 渲染函数
    function animate() {
      requestAnimationFrame(animate);
      renderer.render(scene, camera);
      update();
    }
    animate();

    // 纹理动画函数
    function TextureAnimator(
      texture,
      tilesHoriz,
      tilesVert,
      numTiles,
      tileDispDuration
    ) {
      var tilesHorizontal = tilesHoriz;
      var tilesVertical = tilesVert;
      var numberOfTiles = numTiles;
      texture.wrapS = texture.wrapT = THREE.RepeatWrapping;
      texture.repeat.set(1 / tilesHorizontal, 1 / tilesVertical);
      var tileDisplayDuration = tileDispDuration;
      var currentDisplayTime = 0;
      var currentTile = 0;
      this.update = function (milliSec) {
        currentDisplayTime += milliSec;
        while (currentDisplayTime > tileDisplayDuration) {
          currentDisplayTime -= tileDisplayDuration;
          currentTile++;
          if (currentTile == numberOfTiles) currentTile = 0;
          var currentColumn = currentTile % tilesHorizontal;
          texture.offset.x = currentColumn / tilesHorizontal;
          var currentRow = Math.floor(currentTile / tilesHorizontal);
          texture.offset.y = currentRow / tilesVertical;
        }
      };
    }
  }
}

注：以上就是相关代码，如有疑问请在下方留言，博主会及时回复！！！