2 #include <msp/vr/stereoview.h>
3 #include "openvrdevice.h"
9 Msp::GL::Matrix convert_matrix(const vr::HmdMatrix34_t &m)
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];
24 unsigned OpenVRDevice::n_instances = 0;
26 OpenVRDevice::OpenVRDevice()
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");
37 vr::IVRCompositor *compositor = vr::VRCompositor();
39 throw runtime_error("OpenVR compositor initialization failed");
41 vr::VRCompositor()->SetTrackingSpace(vr::TrackingUniverseSeated);
44 OpenVRDevice::~OpenVRDevice()
50 void OpenVRDevice::configure_view(StereoView &view) const
52 vr::IVRSystem *vr_sys = vr::VRSystem();
54 #if defined(__GNUC__) && defined(_WIN32)
55 /* Visual C++ passes the return value address as first stack parameter and
56 the this pointer in ecx. MinGW does the other way around. This trick
57 forces the function signature to match at machine code level. */
58 typedef void (vr::IVRSystem::*FuncPtr)(vr::HmdMatrix34_t *, vr::EVREye);
59 FuncPtr get_eye_to_head_transform = reinterpret_cast<FuncPtr>(&vr::IVRSystem::GetEyeToHeadTransform);
61 vr::HmdMatrix34_t left, right;
62 (vr_sys->*get_eye_to_head_transform)(&left, vr::Eye_Left);
63 (vr_sys->*get_eye_to_head_transform)(&right, vr::Eye_Right);
65 vr::HmdMatrix34_t left = vr_sys->GetEyeToHeadTransform(vr::Eye_Left);
66 vr::HmdMatrix34_t right = vr_sys->GetEyeToHeadTransform(vr::Eye_Right);
69 view.set_eye_matrices(convert_matrix(left), convert_matrix(right));
72 OpenVRCamera *OpenVRDevice::create_camera(const GL::Camera &bc)
74 return new OpenVRCamera(*this, bc);
77 OpenVRCombiner *OpenVRDevice::create_combiner(GL::View &)
79 return new OpenVRCombiner(*this);
82 void OpenVRDevice::update_pose_matrices()
84 vector<vr::TrackedDevicePose_t> poses;
85 poses.resize(vr::k_unTrackedDeviceIndex_Hmd+1);
86 vr::VRCompositor()->WaitGetPoses(&poses[0], poses.size(), 0, 0);
88 vr::TrackedDevicePose_t &hmd_pose = poses[vr::k_unTrackedDeviceIndex_Hmd];
89 if(hmd_pose.bPoseIsValid)
90 hmd_matrix = convert_matrix(hmd_pose.mDeviceToAbsoluteTracking);