VrShell background implemented in JS.

chrome/browser/resources/vr_shell/vr_shell_ui.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var vrShellUi = (function() {
   'use strict';
 
   let ui = new scene.Scene();
   let uiManager;
 
@@ skipping 15 matching lines @@
   }
 
   class ContentQuad {
     constructor() {
       /** @const */ this.SCREEN_HEIGHT = 1.6;
       /** @const */ this.SCREEN_RATIO = 16 / 9;
       /** @const */ this.BROWSING_SCREEN_DISTANCE = 2.0;
       /** @const */ this.FULLSCREEN_DISTANCE = 3.0;
 
       let element = new api.UiElement(0, 0, 0, 0);
-      element.setIsContentQuad();
+      element.setFill(new api.Content());
       element.setVisible(false);
       element.setSize(
           this.SCREEN_HEIGHT * this.SCREEN_RATIO, this.SCREEN_HEIGHT);
       element.setTranslation(0, 0, -this.BROWSING_SCREEN_DISTANCE);
       this.elementId = ui.addElement(element);
     }
 
     setEnabled(enabled) {
       let update = new api.UiElementUpdate();
       update.setVisible(enabled);
@@ skipping 399 matching lines @@
       if (visible == this.nativeState.visible) {
         return;
       }
       this.nativeState.visible = visible;
       let update = new api.UiElementUpdate();
       update.setVisible(visible);
       ui.updateElement(this.domUiElement.uiElementId, update);
       ui.flush();
     }
   };
+  
+  class Background {
+    constructor() {
+      /** @const */ var GRADIENT_LIGHER_GRAY =
+            {r: 0.57, g: 0.57, b: 0.57, a:1.0};
+      /** @const */ var GRADIENT_DARKER_GRAY =
+            {r: 0.48, g: 0.48, b: 0.48, a:1.0};
+      /** @const */ var SCENE_GROUND_SIZE = 25.0;
+      /** @const */ var SCENE_HEIGHT = 4.0;
+      /** @const */ var TILE_NUMBER = 10;
+
+      // Make ground plane.
+      let groundPlane = new api.UiElementUpdate();
+      groundPlane.setVisible(true);
+      groundPlane.setSize(SCENE_GROUND_SIZE, SCENE_GROUND_SIZE);
+      groundPlane.setFill(new api.OpaqueGradient(GRADIENT_LIGHER_GRAY,
+            GRADIENT_DARKER_GRAY));
+      groundPlane.setTranslation(0, -SCENE_HEIGHT/2, 0);
+      groundPlane.setRotation(1.0, 0.0, 0.0, -Math.PI/2);
+      this.groundPlaneId = ui.addElement(groundPlane);
+      
+      // Make ceiling plane.
+      let ceilingPlane = new api.UiElementUpdate();
+      ceilingPlane.setVisible(true);
+      ceilingPlane.setSize(SCENE_GROUND_SIZE, SCENE_GROUND_SIZE);
+      ceilingPlane.setFill(new api.OpaqueGradient(GRADIENT_LIGHER_GRAY,
+            GRADIENT_DARKER_GRAY));
+      ceilingPlane.setTranslation(0, SCENE_HEIGHT/2, 0);
+      ceilingPlane.setRotation(1.0, 0.0, 0.0, Math.PI/2);
+      this.ceilingPlaneId = ui.addElement(ceilingPlane);
+      
+      // Ground grid.
+      let groundGrid = new api.UiElementUpdate();
+      groundGrid.setVisible(true);
+      groundGrid.setSize(SCENE_GROUND_SIZE, SCENE_GROUND_SIZE);
+      groundGrid.setFill(new api.GridGradient(GRADIENT_LIGHER_GRAY,
+            GRADIENT_LIGHER_GRAY, TILE_NUMBER));
+      groundGrid.setTranslation(0, -SCENE_HEIGHT/2 + 0.01, 0);
+      groundGrid.setRotation(1.0, 0.0, 0.0, -Math.PI/2);
+      this.groundGridId = ui.addElement(groundGrid);
+    }
+    
+    setEnabled(enabled) {
+      let groundPlaneUpdate = new api.UiElementUpdate();
+      groundPlaneUpdate.setVisible(enabled);
+      ui.updateElement(this.groundPlaneId, groundPlaneUpdate);
+      let ceilingPlaneUpdate = new api.UiElementUpdate();
+      ceilingPlaneUpdate.setVisible(enabled);
+      ui.updateElement(this.ceilingPlaneId, ceilingPlaneUpdate);
+      let groundGridUpdate = new api.UiElementUpdate();
+      groundGridUpdate.setVisible(enabled);
+      ui.updateElement(this.groundGridId, groundGridUpdate);
+    }
+  };
 
   class UiManager {
     constructor() {
       this.mode = api.Mode.UNKNOWN;
       this.menuMode = false;
       this.fullscreen = false;
 
+      this.background = new Background();
       this.contentQuad = new ContentQuad();
       let contentId = this.contentQuad.getElementId();
 
       this.controls = new Controls(contentId);
       this.secureOriginWarnings = new SecureOriginWarnings();
       this.urlIndicator = new UrlIndicator();
     }
 
     setMode(mode, menuMode, fullscreen) {
       /** @const */ var URL_INDICATOR_VISIBILITY_TIMEOUT_MS = 5000;
 
       this.mode = mode;
       this.menuMode = menuMode;
       this.fullscreen = fullscreen;
 
       this.contentQuad.setEnabled(mode == api.Mode.STANDARD && !menuMode);
       this.contentQuad.setFullscreen(fullscreen);
       // TODO(crbug/643815): Set aspect ratio on content quad when available.
       // TODO(amp): Don't show controls in fullscreen once MENU mode lands.
       this.controls.setEnabled(mode == api.Mode.STANDARD && !menuMode);
       this.urlIndicator.setEnabled(mode == api.Mode.STANDARD && !menuMode);
       // TODO(amp): Don't show controls in CINEMA mode once MENU mode lands.
       this.urlIndicator.setVisibilityTimeout(
           mode == api.Mode.STANDARD && !menuMode ?
               0 :
               URL_INDICATOR_VISIBILITY_TIMEOUT_MS);
       this.secureOriginWarnings.setEnabled(mode == api.Mode.WEB_VR);
+      this.background.setEnabled(mode == api.Mode.STANDARD && !menuMode);
 
       api.setUiCssSize(
           uiRootElement.clientWidth, uiRootElement.clientHeight, UI_DPR);
     }
 
     setSecurityLevel(level) {
       this.urlIndicator.setSecurityLevel(level);
     }
 
     setWebVRSecureOrigin(secure) {
@@ skipping 38 matching lines @@
     ui.flush();
   }
 
   return {
     initialize: initialize,
     command: command,
   };
 })();
 
 window.addEventListener('load', vrShellUi.initialize);