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node_modules/webvr-polyfill/src/display-wrappers.js

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+/*
+ * Copyright 2016 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.
+ */
+var VRDisplay = require('./base.js').VRDisplay;
+var HMDVRDevice = require('./base.js').HMDVRDevice;
+var PositionSensorVRDevice = require('./base.js').PositionSensorVRDevice;
+
+/**
+ * Wraps a VRDisplay and exposes it as a HMDVRDevice
+ */
+function VRDisplayHMDDevice(display) {
+  this.display = display;
+
+  this.hardwareUnitId = display.displayId;
+  this.deviceId = 'webvr-polyfill:HMD:' + display.displayId;
+  this.deviceName = display.displayName + ' (HMD)';
+}
+VRDisplayHMDDevice.prototype = new HMDVRDevice();
+
+VRDisplayHMDDevice.prototype.getEyeParameters = function(whichEye) {
+  var eyeParameters = this.display.getEyeParameters(whichEye);
+
+  return {
+    currentFieldOfView: eyeParameters.fieldOfView,
+    maximumFieldOfView: eyeParameters.fieldOfView,
+    minimumFieldOfView: eyeParameters.fieldOfView,
+    recommendedFieldOfView: eyeParameters.fieldOfView,
+    eyeTranslation: { x: eyeParameters.offset[0], y: eyeParameters.offset[1], z: eyeParameters.offset[2] },
+    renderRect: {
+      x: (whichEye == 'right') ? eyeParameters.renderWidth : 0,
+      y: 0,
+      width: eyeParameters.renderWidth,
+      height: eyeParameters.renderHeight
+    }
+  };
+};
+
+VRDisplayHMDDevice.prototype.setFieldOfView =
+    function(opt_fovLeft, opt_fovRight, opt_zNear, opt_zFar) {
+  // Not supported. getEyeParameters reports that the min, max, and recommended
+  // FoV is all the same, so no adjustment can be made.
+};
+
+// TODO: Need to hook requestFullscreen to see if a wrapped VRDisplay was passed
+// in as an option. If so we should prevent the default fullscreen behavior and
+// call VRDisplay.requestPresent instead.
+
+/**
+ * Wraps a VRDisplay and exposes it as a PositionSensorVRDevice
+ */
+function VRDisplayPositionSensorDevice(display) {
+  this.display = display;
+
+  this.hardwareUnitId = display.displayId;
+  this.deviceId = 'webvr-polyfill:PositionSensor: ' + display.displayId;
+  this.deviceName = display.displayName + ' (PositionSensor)';
+}
+VRDisplayPositionSensorDevice.prototype = new PositionSensorVRDevice();
+
+VRDisplayPositionSensorDevice.prototype.getState = function() {
+  var pose = this.display.getPose();
+  return {
+    position: pose.position ? { x: pose.position[0], y: pose.position[1], z: pose.position[2] } : null,
+    orientation: pose.orientation ? { x: pose.orientation[0], y: pose.orientation[1], z: pose.orientation[2], w: pose.orientation[3] } : null,
+    linearVelocity: null,
+    linearAcceleration: null,
+    angularVelocity: null,
+    angularAcceleration: null
+  };
+};
+
+VRDisplayPositionSensorDevice.prototype.resetState = function() {
+  return this.positionDevice.resetPose();
+};
+
+
+module.exports.VRDisplayHMDDevice = VRDisplayHMDDevice;
+module.exports.VRDisplayPositionSensorDevice = VRDisplayPositionSensorDevice;
+