dom/vr/XRNativeOriginLocal.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "XRNativeOriginLocal.h"
   8 #include "VRDisplayClient.h"
   9
  10 namespace mozilla::dom {
  11
  12 XRNativeOriginLocal::XRNativeOriginLocal(gfx::VRDisplayClient* aDisplay)
  13     : mDisplay(aDisplay), mInitialPositionValid(false) {
  14   MOZ_ASSERT(aDisplay);
  15 }
  16
  17 gfx::PointDouble3D XRNativeOriginLocal::GetPosition() {
  18   // Keep returning {0,0,0} until a position can be found
  19   if (!mInitialPositionValid) {
  20     const gfx::VRHMDSensorState& sensorState = mDisplay->GetSensorState();
  21     gfx::PointDouble3D origin;
  22     if (sensorState.flags & gfx::VRDisplayCapabilityFlags::Cap_Position ||
  23         sensorState.flags &
  24             gfx::VRDisplayCapabilityFlags::Cap_PositionEmulated) {
  25       mInitialPosition.x = sensorState.pose.position[0];
  26       mInitialPosition.y = sensorState.pose.position[1];
  27       mInitialPosition.z = sensorState.pose.position[2];
  28       mInitialPositionValid = true;
  29     }
  30   }
  31   return mInitialPosition;
  32 }
  33
  34 }  // namespace mozilla::dom