/*
 * Copyright 2015 Google Inc. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

export default {
  // Optionally inject custom Viewer parameters as an option. Each item
  // in the array must be an object with the following properties; here is
  // an example of the built in CardboardV2 viewer:
  //
  // {
  //   id: 'CardboardV2',
  //   label: 'Cardboard I/O 2015',
  //   fov: 60,
  //   interLensDistance: 0.064,
  //   baselineLensDistance: 0.035,
  //   screenLensDistance: 0.039,
  //   distortionCoefficients: [0.34, 0.55],
  //   inverseCoefficients: [-0.33836704, -0.18162185, 0.862655, -1.2462051,
  //     1.0560602, -0.58208317, 0.21609078, -0.05444823, 0.009177956,
  //     -9.904169E-4, 6.183535E-5, -1.6981803E-6]
  // }
  // Added in 0.10.6.
  ADDITIONAL_VIEWERS: [],

  // Select the viewer by ID. If unspecified, defaults to 'CardboardV1'.
  // Added in 0.10.6.
  DEFAULT_VIEWER: '',

  // Provides a CardboardVRDisplay when the native WebVR API exists on
  // mobile platforms that do not have a native VRDisplay.
  // Added in 0.10.0.
  PROVIDE_MOBILE_VRDISPLAY: true,

  /**
   * Options passed into the underlying CardboardVRDisplay
   */

  // By default, on mobile, a wakelock is necessary to prevent the device's screen
  // from turning off without user input. Disable if you're keeping the screen awake through
  // other means on mobile. A wakelock is never used on desktop.
  // Added in 0.10.2.
  MOBILE_WAKE_LOCK: true,

  // Whether or not CardboardVRDisplay is in debug mode. Logs extra
  // messages. Added in 0.10.0.
  DEBUG: false,

  // The URL to JSON of DPDB information. By default, uses the data
  // from https://github.com/WebVRRocks/webvr-polyfill-dpdb; if left
  // falsy, then no attempt is made.
  // Added in 0.10.0
  DPDB_URL: 'https://dpdb.webvr.rocks/dpdb.json',

  // Complementary filter coefficient. 0 for accelerometer, 1 for gyro.
  K_FILTER: 0.98,

  // How far into the future to predict during fast motion (in seconds).
  PREDICTION_TIME_S: 0.040,

  // Flag to disabled the UI in VR Mode.
  CARDBOARD_UI_DISABLED: false, // Default: false

  // Flag to disable the instructions to rotate your device.
  ROTATE_INSTRUCTIONS_DISABLED: false, // Default: false.

  // Enable yaw panning only, disabling roll and pitch. This can be useful
  // for panoramas with nothing interesting above or below.
  YAW_ONLY: false,

  // Scales the recommended buffer size reported by WebVR, which can improve
  // performance.
  // UPDATE(2016-05-03): Setting this to 0.5 by default since 1.0 does not
  // perform well on many mobile devices.
  BUFFER_SCALE: 0.5,

  // Allow VRDisplay.submitFrame to change gl bindings, which is more
  // efficient if the application code will re-bind its resources on the
  // next frame anyway. This has been seen to cause rendering glitches with
  // THREE.js.
  // Dirty bindings include: gl.FRAMEBUFFER_BINDING, gl.CURRENT_PROGRAM,
  // gl.ARRAY_BUFFER_BINDING, gl.ELEMENT_ARRAY_BUFFER_BINDING,
  // and gl.TEXTURE_BINDING_2D for texture unit 0.
  DIRTY_SUBMIT_FRAME_BINDINGS: false,
};