source/ovr/oculusriftdevice.cpp

   1 #include <msp/vr/stereoview.h>
   2 #include "oculusriftdevice.h"
   3 #include "oculusriftdevice_private.h"
   4
   5 using namespace std;
   6
   7 namespace Msp {
   8 namespace VR {
   9
  10 unsigned OculusRiftDevice::n_instances = 0;
  11
  12 OculusRiftDevice::OculusRiftDevice():
  13         priv(new Private),
  14         frame_index(0)
  15 {
  16         if(!n_instances)
  17                 ovr_Initialize();
  18         ++n_instances;
  19
  20         priv->ovr_hmd = ovrHmd_Create(0);
  21         if(!priv->ovr_hmd)
  22         {
  23                 delete priv;
  24                 throw runtime_error("rift hmd not found");
  25         }
  26 }
  27
  28 OculusRiftDevice::~OculusRiftDevice()
  29 {
  30         ovrHmd_Destroy(priv->ovr_hmd);
  31         delete priv;
  32
  33         --n_instances;
  34         if(!n_instances)
  35                 ovr_Shutdown();
  36 }
  37
  38 void OculusRiftDevice::configure_view(StereoView &view) const
  39 {
  40         ovrEyeRenderDesc left_desc = ovrHmd_GetRenderDesc(priv->ovr_hmd, ovrEye_Left, priv->ovr_hmd->DefaultEyeFov[ovrEye_Left]);
  41         ovrEyeRenderDesc right_desc = ovrHmd_GetRenderDesc(priv->ovr_hmd, ovrEye_Right, priv->ovr_hmd->DefaultEyeFov[ovrEye_Left]);
  42         view.set_eye_spacing(left_desc.HmdToEyeViewOffset.x-right_desc.HmdToEyeViewOffset.x);
  43 }
  44
  45 OculusRiftCamera *OculusRiftDevice::create_camera(const GL::Camera &bc) const
  46 {
  47         return new OculusRiftCamera(*this, bc);
  48 }
  49
  50 OculusRiftCombiner *OculusRiftDevice::create_combiner() const
  51 {
  52         return new OculusRiftCombiner(*this);
  53 }
  54
  55 void OculusRiftDevice::begin_frame()
  56 {
  57         priv->frame_timing = ovrHmd_BeginFrameTiming(priv->ovr_hmd, ++frame_index);
  58         timing_active = true;
  59 }
  60
  61 void OculusRiftDevice::end_frame()
  62 {
  63         glFinish();
  64         ovrHmd_EndFrameTiming(priv->ovr_hmd);
  65         timing_active = false;
  66 }
  67
  68 double OculusRiftDevice::get_tracking_time() const
  69 {
  70         if(!timing_active)
  71                 throw logic_error("timing not active");
  72         return priv->frame_timing.ScanoutMidpointSeconds;
  73 }
  74
  75 double OculusRiftDevice::get_timewarp_time() const
  76 {
  77         if(!timing_active)
  78                 throw logic_error("timing not active");
  79         return priv->frame_timing.TimewarpPointSeconds;
  80 }
  81
  82 double OculusRiftDevice::get_current_time() const
  83 {
  84         return ovr_GetTimeInSeconds();
  85 }
  86
  87 } // namespace VR
  88 } // namespace Msp