/// <summary>
/// Tracking poses provided by the SDK come in a right-handed coordinate system. If an application
/// is passing in ovrProjection_LeftHanded into Matrix4f_Projection, then it should also use
/// this function to flip the HMD tracking poses to be left-handed.
///
/// While this utility function is intended to convert a left-handed ovrPosef into a right-handed
/// coordinate system, it will also work for converting right-handed to left-handed since the
/// flip operation is the same for both cases.
/// </summary>
/// <param name="pose">Pose that is right-handed</param>
public OVRBase.Posef Posef_FlipHandedness(OVRBase.Posef pose)
{
OVRTypes.Posef inputOutputPose = pose;
OVR.Posef_FlipHandedness(ref inputOutputPose, ref inputOutputPose);
return(inputOutputPose);
}
/// <summary>
/// Computes offset eye poses based on headPose returned by ovrTrackingState.
/// </summary>
/// <param name="headPose">
/// Indicates the HMD position and orientation to use for the calculation.
/// </param>
/// <param name="hmdToEyeViewOffset">
/// Can be ovrEyeRenderDesc.HmdToEyeViewOffset returned from
/// ovrHmd_GetRenderDesc. For monoscopic rendering, use a vector that is the average
/// of the two vectors for both eyes.
/// </param>
/// <param name="outEyePoses">
/// If outEyePoses are used for rendering, they should be passed to
/// SubmitFrame in LayerEyeFov.RenderPose or LayerEyeFovDepth.RenderPose.
/// </param>
public void CalcEyePoses(OVRBase.Posef headPose, OVRBase.Vector3f[] hmdToEyeViewOffset, ref OVRBase.Posef[] outEyePoses)
{
if (hmdToEyeViewOffset.Length != 2)
{
throw new ArgumentException("The hmdToEyeViewOffset argument must contain 2 elements.", "hmdToEyeViewOffset");
}
if (outEyePoses.Length != 2)
{
throw new ArgumentException("The outEyePoses argument must contain 2 elements.", "outEyePoses");
}
if (m_eyePosesPtr == IntPtr.Zero)
{
// Allocate and copy managed struct to unmanaged memory.
m_poseFSize = Marshal.SizeOf(typeof(OVRBase.Posef));
m_eyePosesPtr = Marshal.AllocHGlobal(m_poseFSize * 2);
}
OVR.CalcEyePoses(headPose, hmdToEyeViewOffset, m_eyePosesPtr);
outEyePoses[0] = (OVRBase.Posef)Marshal.PtrToStructure(m_eyePosesPtr, typeof(OVRBase.Posef));
outEyePoses[1] = (OVRBase.Posef)Marshal.PtrToStructure(m_eyePosesPtr + m_poseFSize, typeof(OVRBase.Posef));
}
