void OculusInterface::initOculus(float _devicePixelAspect)
{
m_devicePixelAspect=_devicePixelAspect;
std::cout<<"setting device aspect "<<m_devicePixelAspect<<"\n";
m_hmd = ovrHmd_Create(0);
if (!m_hmd)
{
std::cerr<<"Unable to create HMD: "<< ovrHmd_GetLastError(NULL)<<std::endl;
std::cerr<<"Attempting to run without HMD\n";
// If we didn't detect an Hmd, create a simulated one for debugging.
m_hmd = ovrHmd_CreateDebug(ovrHmd_DK1);
if (!m_hmd)
{ // Failed Hmd creation.
exit(EXIT_FAILURE);
}
}
m_windowWidth=m_hmd->Resolution.w;
m_windowHeight=m_hmd->Resolution.h;
oculusDebug();
// Start the sensor which provides the Rift’s pose and motion.
ovrHmd_ConfigureTracking(m_hmd, ovrTrackingCap_Orientation | ovrTrackingCap_MagYawCorrection | ovrTrackingCap_Position, 0);
// let's fill in some info about oculus
m_eyeres[0] = ovrHmd_GetFovTextureSize(m_hmd, ovrEye_Left, m_hmd->DefaultEyeFov[0], 1.0);
m_eyeres[1] = ovrHmd_GetFovTextureSize(m_hmd, ovrEye_Right, m_hmd->DefaultEyeFov[1],1.0);
/* and create a single render target texture to encompass both eyes */
//m_fbWidth = m_eyeres[0].w + m_eyeres[1].w;
//m_fbHeight = m_eyeres[0].h > m_eyeres[1].h ? m_eyeres[0].h : m_eyeres[1].h;
ovrSizei recommenedTex0Size = ovrHmd_GetFovTextureSize(m_hmd, ovrEye_Left,m_hmd->DefaultEyeFov[0], m_devicePixelAspect);
ovrSizei recommenedTex1Size = ovrHmd_GetFovTextureSize(m_hmd, ovrEye_Right,m_hmd->DefaultEyeFov[1], m_devicePixelAspect);
// Determine dimensions to fit into a single render target.
ovrSizei renderTargetSize;
m_fbWidth = recommenedTex0Size.w + recommenedTex1Size.w;
m_fbHeight = std::max ( recommenedTex0Size.h, recommenedTex1Size.h );
createRenderTarget();
createOVRGLConfig();
createOVRTextureBuffers();
/* enable low-persistence display and dynamic prediction for lattency compensation */
ovrHmd_SetEnabledCaps(m_hmd, ovrHmdCap_LowPersistence | ovrHmdCap_DynamicPrediction);
/* configure SDK-rendering and enable chromatic abberation correction, vignetting, and
* timewrap, which shifts the image before drawing to counter any lattency between the call
* to ovrHmd_GetEyePose and ovrHmd_EndFrame.
*/
unsigned int dcaps = ovrDistortionCap_Chromatic | ovrDistortionCap_Vignette | ovrDistortionCap_TimeWarp |
ovrDistortionCap_Overdrive;
if(!ovrHmd_ConfigureRendering(m_hmd, &m_glcfg.Config, dcaps, m_hmd->DefaultEyeFov, m_eyeRdesc))
{
fprintf(stderr, "failed to configure distortion renderer\n");
}
}
/*- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
static void
_oculus_raise_python_exception(ovrHmd device,
PyObject *exception,
const char *prefix,
const char *suffix)
{
/* Create string buffer for error messages */
char error_buffer[ERROR_BUFFER_SIZE];
strncpy(error_buffer, prefix, ERROR_BUFFER_SIZE);
strncat(error_buffer, ovrHmd_GetLastError(device), ERROR_BUFFER_SIZE);
strncat(error_buffer, suffix, ERROR_BUFFER_SIZE);
PyErr_SetString(exception, error_buffer);
}
std::string HeadMountedDisplay::lastError()
{
return std::string( ovrHmd_GetLastError( m_handler ) );
}
