public abstract VRCompositorError Submit(Hmd_Eye eEye,GraphicsAPIConvention eTextureType,IntPtr pTexture,ref VRTextureBounds_t pBounds,VRSubmitFlags_t nSubmitFlags);

 /** Returns the transform from eye space to the head space. Eye space is the per-eye flavor of head
 * space that provides stereo disparity. Instead of Model * View * Projection the sequence is Model * View * Eye^-1 * Projection.
 * Normally View and Eye^-1 will be multiplied together and treated as View in your application.
 */
 public HmdMatrix34_t GetHeadFromEyePose(Hmd_Eye eEye)
 {
     return SteamVR.GetHeadFromEyePose(m_pNativeObject, eEye);
 }

 /** The components necessary to build your own projection matrix in case your
 * application is doing something fancy like infinite Z */
 public void GetProjectionRaw(Hmd_Eye eEye, ref float pfLeft, ref float pfRight, ref float pfTop, ref float pfBottom)
 {
     SteamVR.GetProjectionRaw(m_pNativeObject, eEye, ref pfLeft, ref pfRight, ref pfTop, ref pfBottom);
 }

 public static extern HmdMatrix44_t GetProjectionMatrix(System.IntPtr pHmd, Hmd_Eye eEye, float fNearZ, float fFarZ, GraphicsAPIConvention eProjType);

 /** Returns the result of the distortion function for the specified eye and input UVs. UVs go from 0,0 in
 * the upper left of that eye's viewport and 1,1 in the lower right of that eye's viewport. */
 public DistortionCoordinates_t ComputeDistortion(Hmd_Eye eEye, float fU, float fV)
 {
     return SteamVR.ComputeDistortion(m_pNativeObject, eEye, fU, fV);
 }

internal static extern DistortionCoordinates_t SteamAPI_vr_IHmd_ComputeDistortion(IntPtr instancePtr, Hmd_Eye eEye, float fU, float fV);

 public static extern void GetEyeOutputViewport(System.IntPtr pHmd, Hmd_Eye eEye, ref uint pnX, ref uint pnY, ref uint pnWidth, ref uint pnHeight);

 public abstract void GetProjectionRaw(Hmd_Eye eEye,ref float pfLeft,ref float pfRight,ref float pfTop,ref float pfBottom);

 internal static extern DistortionCoordinates_t VR_IVRSystem_ComputeDistortion(IntPtr instancePtr, Hmd_Eye eEye, float fU, float fV);

 public abstract HiddenAreaMesh_t GetHiddenAreaMesh(Hmd_Eye eEye);

 public abstract HmdMatrix44_t GetProjectionMatrix(Hmd_Eye eEye,float fNearZ,float fFarZ,GraphicsAPIConvention eProjType);

 public abstract HmdMatrix34_t GetEyeToHeadTransform(Hmd_Eye eEye);

 public abstract void GetEyeOutputViewport(Hmd_Eye eEye,ref uint pnX,ref uint pnY,ref uint pnWidth,ref uint pnHeight);

 public abstract DistortionCoordinates_t ComputeDistortion(Hmd_Eye eEye,float fU,float fV);

internal static extern HmdMatrix44_t SteamAPI_vr_IHmd_GetProjectionMatrix(IntPtr instancePtr, Hmd_Eye eEye, float fNearZ, float fFarZ, GraphicsAPIConvention eProjType);

 internal static extern void VR_IVRSystem_GetEyeOutputViewport(IntPtr instancePtr, Hmd_Eye eEye, ref uint pnX, ref uint pnY, ref uint pnWidth, ref uint pnHeight);

internal static extern void SteamAPI_vr_IHmd_GetProjectionRaw(IntPtr instancePtr, Hmd_Eye eEye, ref float pfLeft, ref float pfRight, ref float pfTop, ref float pfBottom);

 internal static extern HmdMatrix34_t VR_IVRSystem_GetEyeToHeadTransform(IntPtr instancePtr, Hmd_Eye eEye);

internal static extern HmdMatrix34_t SteamAPI_vr_IHmd_GetHeadFromEyePose(IntPtr instancePtr, Hmd_Eye eEye);

 internal static extern HiddenAreaMesh_t VR_IVRSystem_GetHiddenAreaMesh(IntPtr instancePtr, Hmd_Eye eEye);