BlackFruit-UI/js/globe.js

// 3D 地球效果（首页 banner 右侧）基于 three-globe
// 依赖：全局 THREE 和 ThreeGlobe（在 index.html 中通过 CDN 引入）

(function () {
  function initGlobe() {
    var container = document.getElementById("bannerGlobe");
    if (!container) {
      console.warn("[Globe] bannerGlobe container not found");
      return;
    }
    if (typeof THREE === "undefined") {
      console.warn(
        "[Globe] THREE is undefined, please ensure three.min.js is loaded"
      );
      return;
    }
    if (typeof ThreeGlobe === "undefined") {
      console.warn(
        "[Globe] ThreeGlobe is undefined, please ensure three-globe.min.js is loaded"
      );
      return;
    }

    var width = container.clientWidth || 400;
    var height = container.clientHeight || 400;

    // 基础 Three.js 场景
    var scene = new THREE.Scene();

    var camera = new THREE.PerspectiveCamera(40, width / height, 0.1, 1000);
    // 初始视角，具体距离在 globe 准备好后根据半径自动调整
    camera.position.set(0, 0.2, 8.0);
    camera.lookAt(0, 0, 0);

    var renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true });
    renderer.setPixelRatio(Math.min(window.devicePixelRatio || 1, 2));
    renderer.setSize(width, height);
    renderer.setClearColor(0x000000, 0); // 透明背景
    container.appendChild(renderer.domElement);

    // 柔和光照
    var ambient = new THREE.AmbientLight(0xffffff, 0.65);
    scene.add(ambient);
    var dirLight = new THREE.DirectionalLight(0xffffff, 0.9);
    dirLight.position.set(5, 3, 5);
    scene.add(dirLight);

    // three-globe 实例：仅使用空心陆地多边形（hollow globe 风格）
    var globe = new ThreeGlobe({
      waitForGlobeReady: true,
      animateIn: true,
    })
      // 不使用 three-globe 内置球体贴图，只保留大气层，陆地轮廓由 polygons 层绘制
      .showGlobe(false)
      .showAtmosphere(false)
      .atmosphereColor("#2b9fff")
      .atmosphereAltitude(0.18)
      .showGraticules(false);

    scene.add(globe);

    // 告诉 three-globe 当前渲染器的实际尺寸，避免默认按全窗口大小计算导致比例失真
    if (typeof globe.rendererSize === "function") {
      globe.rendererSize(new THREE.Vector2(width, height));
    }

    // 在 globe 初始化完成后，根据实际半径自动调整相机距离，保证整球落在视野内
    if (typeof globe.onGlobeReady === "function" && typeof globe.getGlobeRadius === "function") {
      globe.onGlobeReady(function () {
        var r = globe.getGlobeRadius(); // three-globe 内部使用的球半径
        // 经验：以半径的约 3 倍距离拍摄，配合 40° 视角，可以完整显示球体并留一定留白
        var dist = r * 3.2;
        camera.position.set(0, 0.2, dist);
        camera.lookAt(0, 0, 0);
        // 通知 three-globe 当前视角，用于部分图层的内部计算
        if (typeof globe.setPointOfView === "function") {
          globe.setPointOfView(camera);
        }
      });
    }

    // 按 hollow-globe 风格加载陆地多边形，绘制空心地球轮廓
    (function loadLandPolygons() {
      if (typeof topojson === "undefined") {
        console.warn(
          "[Globe] topojson-client is undefined, unable to render hollow globe polygons"
        );
        return;
      }

      // 请确保 /web/BlackFruit-web/assets/data/land-110m.json 存在，
      // 内容为你刚才提供的 Topology JSON。
      fetch("/web/BlackFruit-web/assets/data/land-110m.json")
        .then(function (res) {
          return res.json();
        })
        .then(function (landTopo) {
          try {
            var landGeo = topojson.feature(
              landTopo,
              landTopo.objects.land
            ).features;

            globe
              .polygonsData(landGeo)
              .polygonCapMaterial(
                new THREE.MeshLambertMaterial({
                  // 橙色陆地，靠近阿里云风格，配合蓝白背景形成冷暖对比
                  color: "#FF6A00",
                  transparent: true,
                  opacity: 0.9,
                  side: THREE.DoubleSide,
                })
              )
              .polygonSideColor(function () {
                return "rgba(0,0,0,0)";
              });
          } catch (e) {
            console.warn("[Globe] failed to parse land-110m topology:", e);
          }
        })
        .catch(function (err) {
          console.warn(
            "[Globe] failed to load /web/BlackFruit-web/assets/data/land-110m.json:",
            err
          );
        });
    })();

    // 暴露给调试用
    if (typeof window !== "undefined") {
      window.__globe = globe;
    }

    // 自适应窗口大小
    function onResize() {
      if (!container) return;
      var w = container.clientWidth || width;
      var h = container.clientHeight || height;
      camera.aspect = w / h;
      camera.updateProjectionMatrix();
      renderer.setSize(w, h);
      // 同步 three-globe 对 renderer 尺寸的感知，保证缩放比例一致
      if (typeof globe.rendererSize === "function") {
        globe.rendererSize(new THREE.Vector2(w, h));
      }
    }
    window.addEventListener("resize", onResize);

    // 动画循环
    var lastTime = performance.now();
    function animate() {
      requestAnimationFrame(animate);

      var now = performance.now();
      var delta = (now - lastTime) / 1000;
      lastTime = now;

      // 地球自转
      globe.rotation.y += delta * 0.25;

      renderer.render(scene, camera);
    }

    animate();
  }

  if (document.readyState === "loading") {
    document.addEventListener("DOMContentLoaded", initGlobe);
  } else {
    initGlobe();
  }
})();