From 44406bebeba5758c4f817809dd351afd2d0d80b6 Mon Sep 17 00:00:00 2001
From: Imanol Fernandez <mortimergoro@gmail.com>
Date: Wed, 1 Apr 2020 19:12:07 +0200
Subject: [PATCH] Calculate standingMatrix using local floor relative pose
 transform (#3078)

---
 app/src/oculusvr/cpp/DeviceDelegateOculusVR.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/app/src/oculusvr/cpp/DeviceDelegateOculusVR.cpp b/app/src/oculusvr/cpp/DeviceDelegateOculusVR.cpp
index c475f9231..6a17208b5 100644
--- a/app/src/oculusvr/cpp/DeviceDelegateOculusVR.cpp
+++ b/app/src/oculusvr/cpp/DeviceDelegateOculusVR.cpp
@@ -901,6 +901,9 @@ DeviceDelegateOculusVR::StartFrame(const FramePrediction aPrediction) {
                                    device::InlineSession | device::ImmersiveVRSession;
     if (m.predictedTracking.Status & VRAPI_TRACKING_STATUS_POSITION_TRACKED) {
       caps |= device::Position;
+      auto standing = vrapi_LocateTrackingSpace(m.ovr, VRAPI_TRACKING_SPACE_LOCAL_FLOOR);
+      vrb::Vector translation(-standing.Position.x, -standing.Position.y, -standing.Position.z);
+      m.immersiveDisplay->SetSittingToStandingTransform(vrb::Matrix::Translation(translation));
     } else {
       caps |= device::PositionEmulated;
     }