source/oculusriftcamera.cpp

   1 #include "oculusriftcamera.h"
   2 #include "oculusriftdevice.h"
   3 #include "oculusriftdevice_private.h"
   4
   5 namespace Msp {
   6 namespace VR {
   7
   8 OculusRiftCamera::OculusRiftCamera(const OculusRiftDevice &d, const GL::Camera &c):
   9         device(d),
  10         base_camera(c)
  11 {
  12         const OculusRiftDevice::Private &dev_priv = device.get_private();
  13         unsigned supported = ovrTrackingCap_Orientation|ovrTrackingCap_MagYawCorrection|ovrTrackingCap_Position;
  14         ovrHmd_ConfigureTracking(dev_priv.ovr_hmd, supported, 0);
  15 }
  16
  17 void OculusRiftCamera::reset_tracking()
  18 {
  19         ovrHmd_RecenterPose(device.get_private().ovr_hmd);
  20 }
  21
  22 void OculusRiftCamera::update()
  23 {
  24         ovrTrackingState state = ovrHmd_GetTrackingState(device.get_private().ovr_hmd, ovr_GetTimeInSeconds());
  25         OVR::Posef head_pose = state.HeadPose.ThePose;
  26         OVR::Matrix4f tracking_matrix(head_pose.Rotation);
  27         OVR::Vector3f trans = head_pose.Translation;
  28         const float *m = &tracking_matrix.M[0][0];
  29
  30         const GL::Vector3 &base_look = base_camera.get_look_direction();
  31         GL::Vector3 base_right = normalize(cross(base_look, base_camera.get_up_direction()));
  32         GL::Vector3 base_up = normalize(cross(base_right, base_look));
  33
  34         set_position(base_camera.get_position()+trans.x*base_right+trans.y*base_up-trans.z*base_look);
  35         set_up_direction(base_right*m[1]+base_up*m[5]-base_look*m[9]);
  36         set_look_direction(-base_right*m[2]-base_up*m[6]+base_look*m[10]);
  37         set_depth_clip(base_camera.get_near_clip(), base_camera.get_far_clip());
  38         set_field_of_view(base_camera.get_field_of_view());
  39         set_aspect(base_camera.get_aspect());
  40 }
  41
  42 } // namespace VR
  43 } // namespace Msp