source/openvr/openvrdevice.cpp

   1 #include <openvr.h>
   2 #include <msp/vr/stereoview.h>
   3 #include "openvrdevice.h"
   4
   5 using namespace std;
   6
   7 namespace {
   8
   9 Msp::GL::Matrix convert_matrix(const vr::HmdMatrix34_t &m)
  10 {
  11         Msp::GL::Matrix result;
  12         for(unsigned i=0; i<3; ++i)
  13                 for(unsigned j=0; j<4; ++j)
  14                         result(i, j) = m.m[i][j];
  15         return result;
  16 }
  17
  18 }
  19
  20
  21 namespace Msp {
  22 namespace VR {
  23
  24 unsigned OpenVRDevice::n_instances = 0;
  25
  26 OpenVRDevice::OpenVRDevice()
  27 {
  28         if(!n_instances)
  29         {
  30                 vr::EVRInitError init_err;
  31                 vr::VR_Init(&init_err, vr::VRApplication_Scene);
  32                 if(init_err!=vr::VRInitError_None)
  33                         throw runtime_error("OpenVR initialization failed");
  34         }
  35         ++n_instances;
  36
  37         vr::IVRCompositor *compositor = vr::VRCompositor();
  38         if(!compositor)
  39                 throw runtime_error("OpenVR compositor initialization failed");
  40
  41         vr::VRCompositor()->SetTrackingSpace(vr::TrackingUniverseSeated);
  42 }
  43
  44 OpenVRDevice::~OpenVRDevice()
  45 {
  46         if(!--n_instances)
  47                 vr::VR_Shutdown();
  48 }
  49
  50 void OpenVRDevice::configure_view(StereoView &view) const
  51 {
  52         vr::IVRSystem *vr_sys = vr::VRSystem();
  53         vr::HmdMatrix34_t left = vr_sys->GetEyeToHeadTransform(vr::Eye_Left);
  54         vr::HmdMatrix34_t right = vr_sys->GetEyeToHeadTransform(vr::Eye_Right);
  55         view.set_eye_matrices(convert_matrix(left), convert_matrix(right));
  56 }
  57
  58 OpenVRCamera *OpenVRDevice::create_camera(const GL::Camera &bc)
  59 {
  60         return new OpenVRCamera(*this, bc);
  61 }
  62
  63 OpenVRCombiner *OpenVRDevice::create_combiner(GL::View &)
  64 {
  65         return new OpenVRCombiner(*this);
  66 }
  67
  68 void OpenVRDevice::update_pose_matrices()
  69 {
  70         vector<vr::TrackedDevicePose_t> poses;
  71         poses.resize(vr::k_unTrackedDeviceIndex_Hmd+1);
  72         vr::VRCompositor()->WaitGetPoses(&poses[0], poses.size(), 0, 0);
  73
  74         vr::TrackedDevicePose_t &hmd_pose = poses[vr::k_unTrackedDeviceIndex_Hmd];
  75         if(hmd_pose.bPoseIsValid)
  76                 hmd_matrix = convert_matrix(hmd_pose.mDeviceToAbsoluteTracking);
  77 }
  78
  79 } // namespace VR
  80 } // namespace Msp