Make LibOVR support optional at compile-time

[libs/vr.git] / source / ovr / oculusriftcamera.cpp

diff --git a/source/ovr/oculusriftcamera.cpp b/source/ovr/oculusriftcamera.cpp
new file mode 100644 (file)
index 0000000..0eede27
--- /dev/null
+++ b/source/ovr/oculusriftcamera.cpp
@@ -0,0 +1,48 @@
+#include "oculusriftcamera.h"
+#include "oculusriftdevice.h"
+#include "oculusriftdevice_private.h"
+
+namespace Msp {
+namespace VR {
+
+OculusRiftCamera::OculusRiftCamera(const OculusRiftDevice &d, const GL::Camera &c):
+       device(d),
+       base_camera(c)
+{
+       unsigned supported = ovrTrackingCap_Orientation|ovrTrackingCap_MagYawCorrection|ovrTrackingCap_Position;
+       ovrHmd_ConfigureTracking(device.get_private().ovr_hmd, supported, 0);
+}
+
+void OculusRiftCamera::reset_tracking()
+{
+       ovrHmd_RecenterPose(device.get_private().ovr_hmd);
+}
+
+void OculusRiftCamera::update()
+{
+       double time;
+       if(device.is_timing_active())
+               time = device.get_tracking_time();
+       else
+               time = device.get_current_time();
+
+       ovrTrackingState state = ovrHmd_GetTrackingState(device.get_private().ovr_hmd, time);
+       OVR::Posef head_pose = state.HeadPose.ThePose;
+       OVR::Matrix4f tracking_matrix(head_pose.Rotation);
+       OVR::Vector3f trans = head_pose.Translation;
+       const float *m = &tracking_matrix.M[0][0];
+
+       const GL::Vector3 &base_look = base_camera.get_look_direction();
+       GL::Vector3 base_right = normalize(cross(base_look, base_camera.get_up_direction()));
+       GL::Vector3 base_up = normalize(cross(base_right, base_look));
+
+       set_position(base_camera.get_position()+trans.x*base_right+trans.y*base_up-trans.z*base_look);
+       set_up_direction(base_right*m[1]+base_up*m[5]-base_look*m[9]);
+       set_look_direction(-base_right*m[2]-base_up*m[6]+base_look*m[10]);
+       set_depth_clip(base_camera.get_near_clip(), base_camera.get_far_clip());
+       set_field_of_view(base_camera.get_field_of_view());
+       set_aspect(base_camera.get_aspect());
+}
+
+} // namespace VR
+} // namespace Msp