adding capitalised Earth.ts

src/viewer/Earth.ts

@@ -0,0 +1,47 @@
+import { Color, TextureLoader, MeshPhongMaterial, SphereGeometry, Mesh, Group } from '../utils/three';
+import SceneComponent from './interfaces/SceneComponent';
+import SatelliteOrbitScene from './SatelliteOrbitScene';
+
+class Earth implements SceneComponent {
+  basePath = '/StuffInSpace/images';
+  radiusInKm = 6371.0;
+  pxToRadius = 3185.5;
+
+  sphere: Mesh | undefined = undefined;
+  group: Group | undefined = undefined;
+
+
+  init (scene: SatelliteOrbitScene) {
+    const dayTexture = new TextureLoader().load(`${this.basePath}/earth-blue-marble.jpg`);
+    const nightTexture = new TextureLoader().load(`${this.basePath}/nightearth-4096.png`);
+    const bumpTexture = new TextureLoader().load(`${this.basePath}/earth-topology.png`);
+    const earthSpecularMap = new TextureLoader().load(`${this.basePath}/earth-water.png`);
+
+    const dayMaterial = new MeshPhongMaterial({
+      map: dayTexture,
+      bumpMap: bumpTexture,
+      emissiveMap: nightTexture,
+      emissive: new Color(0x888888),
+      emissiveIntensity: 5,
+      specularMap: earthSpecularMap,
+      specular: 1,
+      shininess: 15,
+      bumpScale: 1
+    });
+
+    const radius = scene.km2pixels(this.radiusInKm);
+    const geometry = new SphereGeometry(radius, 32, 32);
+    this.sphere = new Mesh( geometry, dayMaterial );
+    scene.add(this.sphere);
+  }
+
+  update (): void {
+    // do nothing
+  }
+
+  getMesh () {
+    return this.sphere;
+  }
+}
+
+export default Earth;