public int GetIntParameter(OpenHMD.ohmd_int_value value)
{
int result;
OpenHMD.ohmd_device_geti(_context, value, out result);
return(result);
}
protected override void Dispose(bool disposing)
{
base.Dispose(disposing);
if (_context != IntPtr.Zero)
{
OpenHMD.ohmd_ctx_destroy(_context);
}
}
public override int TryInitialize()
{
_context = OpenHMD.ohmd_ctx_create();
if (_context == IntPtr.Zero)
{
return(-1);
}
var deviceCount = OpenHMD.ohmd_ctx_probe(_context);
if (deviceCount < 0)
{
return(-2);
}
_hmd = OpenHMD.ohmd_list_open_device(_context, 0);
if (_hmd == IntPtr.Zero)
{
return(-3);
}
_hmdDescription = new OpenHMDDesc();
_hmdDescription.HorizontalResolution = GetIntParameter(OpenHMD.ohmd_int_value.OHMD_SCREEN_HORIZONTAL_RESOLUTION);
_hmdDescription.VerticalResolution = GetIntParameter(OpenHMD.ohmd_int_value.OHMD_SCREEN_VERTICAL_RESOLUTION);
_hmdDescription.HorizontalSize = GetFloatParameters(OpenHMD.ohmd_float_value.OHMD_SCREEN_HORIZONTAL_SIZE, 1)[0];
_hmdDescription.VerticalSize = GetFloatParameters(OpenHMD.ohmd_float_value.OHMD_SCREEN_VERTICAL_SIZE, 1)[0];
_hmdDescription.LensSeparation = GetFloatParameters(OpenHMD.ohmd_float_value.OHMD_LENS_HORIZONTAL_SEPARATION, 1)[0];
_hmdDescription.LensVCenter = GetFloatParameters(OpenHMD.ohmd_float_value.OHMD_LENS_VERTICAL_POSITION, 1)[0];
_hmdDescription.LeftEyeFov = GetFloatParameters(OpenHMD.ohmd_float_value.OHMD_LEFT_EYE_FOV, 1)[0];
_hmdDescription.RightEyeFov = GetFloatParameters(OpenHMD.ohmd_float_value.OHMD_RIGHT_EYE_FOV, 1)[0];
_hmdDescription.LeftEyeAspect = GetFloatParameters(OpenHMD.ohmd_float_value.OHMD_LEFT_EYE_ASPECT_RATIO, 1)[0];
_hmdDescription.RightEyeAspect = GetFloatParameters(OpenHMD.ohmd_float_value.OHMD_RIGHT_EYE_ASPECT_RATIO, 1)[0];
var distortion = GetFloatParameters(OpenHMD.ohmd_float_value.OHMD_DISTORTION_K, 6);
_hmdDescription.DistortionK = new Vector3[2];
_hmdDescription.DistortionK[0] = new Vector3(distortion[0], distortion[1], distortion[2]);
_hmdDescription.DistortionK[1] = new Vector3(distortion[3], distortion[4], distortion[5]);
_projectionMatrix = new Matrix[2];
_projectionMatrix[0] = Matrix.CreatePerspectiveFieldOfView(_hmdDescription.LeftEyeFov, _hmdDescription.LeftEyeAspect, 0.1f, 1000.0f);
_projectionMatrix[1] = Matrix.CreatePerspectiveFieldOfView(_hmdDescription.RightEyeFov, _hmdDescription.RightEyeAspect, 0.1f, 1000.0f);
DistortionEffect = Application.Content.Load <Effect>("Shaders/PostProcessing/OsvrDistortion");
DistortionCorrectionRequired = true;
return(0);
}
public float[] GetFloatParameters(OpenHMD.ohmd_float_value value, int arrayLength)
{
var result = new float[arrayLength];
//Allocate the result memory, otherwise memory gets corrupted on read / write.
var gch = GCHandle.Alloc(result, GCHandleType.Pinned);
var f = gch.AddrOfPinnedObject();
//Get the actual value.
OpenHMD.ohmd_device_getf(_hmd, value, f);
//Copy the returned IntPtr to the result array.
Marshal.Copy(f, result, 0, arrayLength);
//Free the memory.
gch.Free();
return(result);
}
