source/ovr/oculusriftdevice.cpp

   1 #include <msp/graphics/display.h>
   2 #include <msp/vr/stereoview.h>
   3 #include "oculusriftdevice.h"
   4 #include "oculusriftdevice_private.h"
   5
   6 using namespace std;
   7
   8 namespace Msp {
   9 namespace VR {
  10
  11 unsigned OculusRiftDevice::n_instances = 0;
  12
  13 OculusRiftDevice::OculusRiftDevice():
  14         priv(new Private),
  15         frame_index(0)
  16 {
  17         if(!n_instances)
  18                 ovr_Initialize();
  19         ++n_instances;
  20
  21         priv->ovr_hmd = ovrHmd_Create(0);
  22         if(!priv->ovr_hmd)
  23         {
  24                 delete priv;
  25                 throw runtime_error("rift hmd not found");
  26         }
  27 }
  28
  29 OculusRiftDevice::~OculusRiftDevice()
  30 {
  31         ovrHmd_Destroy(priv->ovr_hmd);
  32         delete priv;
  33
  34         --n_instances;
  35         if(!n_instances)
  36                 ovr_Shutdown();
  37 }
  38
  39 void OculusRiftDevice::configure_window(Graphics::Window &window) const
  40 {
  41         Graphics::WindowOptions win_opts = window.get_options();
  42         win_opts.width = priv->ovr_hmd->Resolution.w;
  43         win_opts.height = priv->ovr_hmd->Resolution.h;
  44
  45         const list<Graphics::Monitor> &monitors = window.get_display().get_monitors();
  46         string hmd_name = priv->ovr_hmd->ProductName;
  47         for(list<Graphics::Monitor>::const_iterator i=monitors.begin(); i!=monitors.end(); ++i)
  48                 if(hmd_name.find(i->name)!=string::npos)
  49                 {
  50                         win_opts.fullscreen = true;
  51                         win_opts.fullscreen_monitor = &*i;
  52                         win_opts.fullscreen_exclusive = false;
  53                 }
  54
  55         window.reconfigure(win_opts);
  56 }
  57
  58 void OculusRiftDevice::configure_view(StereoView &view) const
  59 {
  60         ovrEyeRenderDesc left_desc = ovrHmd_GetRenderDesc(priv->ovr_hmd, ovrEye_Left, priv->ovr_hmd->DefaultEyeFov[ovrEye_Left]);
  61         ovrEyeRenderDesc right_desc = ovrHmd_GetRenderDesc(priv->ovr_hmd, ovrEye_Right, priv->ovr_hmd->DefaultEyeFov[ovrEye_Left]);
  62         view.set_eye_spacing(left_desc.HmdToEyeViewOffset.x-right_desc.HmdToEyeViewOffset.x);
  63 }
  64
  65 OculusRiftCamera *OculusRiftDevice::create_camera(const GL::Camera &bc)
  66 {
  67         return new OculusRiftCamera(*this, bc);
  68 }
  69
  70 OculusRiftCombiner *OculusRiftDevice::create_combiner(GL::View &view)
  71 {
  72         return new OculusRiftCombiner(*this, view);
  73 }
  74
  75 void OculusRiftDevice::begin_frame()
  76 {
  77         priv->frame_timing = ovrHmd_BeginFrameTiming(priv->ovr_hmd, ++frame_index);
  78         timing_active = true;
  79 }
  80
  81 void OculusRiftDevice::end_frame()
  82 {
  83         glFinish();
  84         ovrHmd_EndFrameTiming(priv->ovr_hmd);
  85         timing_active = false;
  86 }
  87
  88 double OculusRiftDevice::get_tracking_time() const
  89 {
  90         if(!timing_active)
  91                 throw logic_error("timing not active");
  92         return priv->frame_timing.ScanoutMidpointSeconds;
  93 }
  94
  95 double OculusRiftDevice::get_timewarp_time() const
  96 {
  97         if(!timing_active)
  98                 throw logic_error("timing not active");
  99         return priv->frame_timing.TimewarpPointSeconds;
 100 }
 101
 102 double OculusRiftDevice::get_current_time() const
 103 {
 104         return ovr_GetTimeInSeconds();
 105 }
 106
 107 } // namespace VR
 108 } // namespace Msp