A function to get the distortion parameters for an OSVR Application.

OsvrGetDistortion.cs

public Vector3[] GetDistortionParams()
{
    var displayConfig = _context.GetDisplayConfig();
    var numViewers = displayConfig.GetNumViewers();
    var distortionParams = new Vector3[2];

    if (numViewers != 1)
        return -1;

    for (uint viewer = 0; viewer < numViewers; viewer++)
    {
        var numEyes = displayConfig.GetNumEyesForViewer(viewer);
        if (numEyes != 2)
            return -2;

        for (byte eye = 0; eye < numEyes; eye++)
        {
            var numSurfaces = displayConfig.GetNumSurfacesForViewerEye(viewer, eye);
            if (numSurfaces != 1)
                return -3;

            for (uint surface = 0; surface < numSurfaces; surface++)
            {
                var distortionCorrectionRequired = displayConfig.DoesViewerEyeSurfaceWantDistortion(viewer, eye, surface);
                if (distortionCorrectionRequired)
                {
                    var radialDistortionPriority = displayConfig.GetViewerEyeSurfaceRadialDistortionPriority(viewer, eye, surface);
                    if (radialDistortionPriority >= 0)
                    {
                        var dist = displayConfig.GetViewerEyeSurfaceRadialDistortion(viewer, eye, surface);
                        distortionParams[eye].X = (float)dist.k1.x;
                        distortionParams[eye].Y = (float)dist.k1.y;
                        distortionParams[eye].Z = (float)dist.k1.z;
                    }
                }
            }
        }
    }
    
    return distortionParams;
}