From e6571d334afa4cd7ec149bd01658dd3b131f711f Mon Sep 17 00:00:00 2001
From: Thijs Wenker <me@thoys.nl>
Date: Thu, 31 Jul 2014 22:37:02 +0200
Subject: [PATCH] Oculus SDK 0.4 support for Windows (tested with DK2 HMD)

---
 interface/src/devices/OculusManager.cpp | 52 +++++++++++++++++++++----
 1 file changed, 44 insertions(+), 8 deletions(-)

diff --git a/interface/src/devices/OculusManager.cpp b/interface/src/devices/OculusManager.cpp
index 49164cc8dd..0ffc7f405f 100644
--- a/interface/src/devices/OculusManager.cpp
+++ b/interface/src/devices/OculusManager.cpp
@@ -44,7 +44,7 @@ ovrFovPort OculusManager::_eyeFov[ovrEye_Count];
 ovrEyeRenderDesc OculusManager::_eyeRenderDesc[ovrEye_Count];
 ovrSizei OculusManager::_renderTargetSize;
 ovrVector2f OculusManager::_UVScaleOffset[ovrEye_Count][2];
-GLuint  OculusManager::_vertices[ovrEye_Count] = { 0, 0 };
+GLuint OculusManager::_vertices[ovrEye_Count] = { 0, 0 };
 GLuint OculusManager::_indices[ovrEye_Count] = { 0, 0 };
 GLsizei OculusManager::_meshSize[ovrEye_Count] = { 0, 0 };
 ovrFrameTiming OculusManager::_hmdFrameTiming;
@@ -66,12 +66,13 @@ void OculusManager::connect() {
             UserActivityLogger::getInstance().connectedDevice("hmd", "oculus");
         }
         _isConnected = true;
-      
-        ovrHmd_GetDesc(_ovrHmd, &_ovrHmdDesc);
-
+#ifdef _WIN32
+        _eyeFov[0] = _ovrHmd->DefaultEyeFov[0];
+        _eyeFov[1] = _ovrHmd->DefaultEyeFov[1];
+#else
         _eyeFov[0] = _ovrHmdDesc.DefaultEyeFov[0];
         _eyeFov[1] = _ovrHmdDesc.DefaultEyeFov[1];
-
+#endif
         //Get texture size
         ovrSizei recommendedTex0Size = ovrHmd_GetFovTextureSize(_ovrHmd, ovrEye_Left,
                                                                 _eyeFov[0], 1.0f);
@@ -86,11 +87,21 @@ void OculusManager::connect() {
         _eyeRenderDesc[0] = ovrHmd_GetRenderDesc(_ovrHmd, ovrEye_Left, _eyeFov[0]);
         _eyeRenderDesc[1] = ovrHmd_GetRenderDesc(_ovrHmd, ovrEye_Right, _eyeFov[1]);
 
+#ifdef _WIN32
+        ovrHmd_SetEnabledCaps(_ovrHmd, ovrHmdCap_LowPersistence);
+#else
         ovrHmd_SetEnabledCaps(_ovrHmd, ovrHmdCap_LowPersistence | ovrHmdCap_LatencyTest);
+#endif
 
+#ifdef _WIN32
+        ovrHmd_ConfigureTracking(_ovrHmd, ovrTrackingCap_Orientation | ovrTrackingCap_Position |
+                                 ovrTrackingCap_MagYawCorrection,
+                                 ovrTrackingCap_Orientation);
+#else
         ovrHmd_StartSensor(_ovrHmd, ovrSensorCap_Orientation | ovrSensorCap_YawCorrection |
                            ovrSensorCap_Position,
                            ovrSensorCap_Orientation);
+#endif
 
         if (!_camera) {
             _camera = new Camera;
@@ -183,6 +194,16 @@ void OculusManager::generateDistortionMesh() {
         DistortionVertex* v = pVBVerts;
         ovrDistortionVertex* ov = meshData.pVertexData;
         for (unsigned int vertNum = 0; vertNum < meshData.VertexCount; vertNum++) {
+#ifdef _WIN32
+            v->pos.x = ov->ScreenPosNDC.x;
+            v->pos.y = ov->ScreenPosNDC.y;
+            v->texR.x = ov->TanEyeAnglesR.x;
+            v->texR.y = ov->TanEyeAnglesR.y;
+            v->texG.x = ov->TanEyeAnglesG.x;
+            v->texG.y = ov->TanEyeAnglesG.y;
+            v->texB.x = ov->TanEyeAnglesB.x;
+            v->texB.y = ov->TanEyeAnglesB.y;
+#else
             v->pos.x = ov->Pos.x;
             v->pos.y = ov->Pos.y;
             v->texR.x = ov->TexR.x;
@@ -191,6 +212,7 @@ void OculusManager::generateDistortionMesh() {
             v->texG.y = ov->TexG.y;
             v->texB.x = ov->TexB.x;
             v->texB.y = ov->TexB.y;
+#endif
             v->color.r = v->color.g = v->color.b = (GLubyte)(ov->VignetteFactor * 255.99f);
             v->color.a = (GLubyte)(ov->TimeWarpFactor * 255.99f);
             v++; 
@@ -294,9 +316,11 @@ void OculusManager::display(const glm::quat &bodyOrientation, const glm::vec3 &p
   
     //Render each eye into an fbo
     for (int eyeIndex = 0; eyeIndex < ovrEye_Count; eyeIndex++) {
-
+#ifdef _WIN32
+        ovrEyeType eye = _ovrHmd->EyeRenderOrder[eyeIndex];
+#else
         ovrEyeType eye = _ovrHmdDesc.EyeRenderOrder[eyeIndex];
-
+#endif
         //Set the camera rotation for this eye
         eyeRenderPose[eye] = ovrHmd_GetEyePose(_ovrHmd, eye);
         orientation.x = eyeRenderPose[eye].Orientation.x;
@@ -433,10 +457,22 @@ void OculusManager::reset() {
 //Gets the current predicted angles from the oculus sensors
 void OculusManager::getEulerAngles(float& yaw, float& pitch, float& roll) {
 #ifdef HAVE_LIBOVR
+#ifdef _WIN32
+    ovrTrackingState ts = ovrHmd_GetTrackingState(_ovrHmd, ovr_GetTimeInSeconds());
+#else
     ovrSensorState ss = ovrHmd_GetSensorState(_ovrHmd, _hmdFrameTiming.ScanoutMidpointSeconds);
-
+#endif
+#ifdef _WIN32
+    if (ts.StatusFlags & (ovrStatus_OrientationTracked | ovrStatus_PositionTracked)) {
+#else
     if (ss.StatusFlags & (ovrStatus_OrientationTracked | ovrStatus_PositionTracked)) {
+#endif
+        
+#ifdef _WIN32
+        ovrPosef pose = ts.CameraPose;
+#else
         ovrPosef pose = ss.Predicted.Pose;
+#endif
         Quatf orientation = Quatf(pose.Orientation);
         orientation.GetEulerAngles<Axis_Y, Axis_X, Axis_Z, Rotate_CCW, Handed_R>(&yaw, &pitch, &roll);
     } else {