Import JSONLegacyLoader to load terrain

Author: dmarcos

examples/showcase/link-traversal/city.html

@@ -9,6 +9,7 @@
     <script src="js/components/aframe-tooltip-component.js"></script>
     <script src="js/components/camera-position.js"></script>
     <script src="js/components/ground.js"></script>
+    <script src="vendor/LegacyJSONLoader.js"></script>
     <script src="js/components/link-controls.js"></script>
     <script src="shaders/skyGradient.js"></script>
   </head>

examples/showcase/link-traversal/index.html

@@ -9,6 +9,7 @@
     <script src="js/components/aframe-tooltip-component.js"></script>
     <script src="js/components/camera-position.js"></script>
     <script src="js/components/ground.js"></script>
+    <script src="vendor/LegacyJSONLoader.js"></script>
     <script src="js/components/link-controls.js"></script>
     <script src="shaders/skyGradient.js"></script>
   </head>

examples/showcase/link-traversal/js/components/ground.js

@@ -7,7 +7,7 @@ AFRAME.registerComponent('ground', {
     var objectLoader;
     var self = this;
     if (this.objectLoader) { return; }
-    objectLoader = this.objectLoader = new THREE.ObjectLoader();
+    objectLoader = this.objectLoader = new THREE.LegacyJSONLoader();
     objectLoader.setCrossOrigin('');
     objectLoader.load(this.data.url, function (obj) {
       obj.children.forEach(function (value) {

examples/showcase/link-traversal/mountains.html

@@ -9,6 +9,7 @@
     <script src="js/components/aframe-tooltip-component.js"></script>
     <script src="js/components/camera-position.js"></script>
     <script src="js/components/ground.js"></script>
+    <script src="vendor/LegacyJSONLoader.js"></script>
     <script src="js/components/link-controls.js"></script>
     <script src="shaders/skyGradient.js"></script>
   </head>

examples/showcase/link-traversal/sunrise.html

@@ -9,6 +9,7 @@
     <script src="js/components/aframe-tooltip-component.js"></script>
     <script src="js/components/camera-position.js"></script>
     <script src="js/components/ground.js"></script>
+    <script src="vendor/LegacyJSONLoader.js"></script>
     <script src="js/components/link-controls.js"></script>
     <script src="shaders/skyGradient.js"></script>
   </head>