General:

*         Upgraded Steamworks SDK to v1.29
*         Fixed mod compatibility problem with Multiplayer Base that was introduced in September.
*         In Hammer, while using the Vertex Tool, pressing CTRL+B will snap selected vertices to the grid.

Virtual Reality:
*         Mods that support virtual reality now need to have a line in gameinfo.txt that says “supportsvr 1”. This indicates to gameui and engine that certain UI should be enabled.
*         VR-enabled mods will now start up in VR mode when launched from Steam’s VR mode.

Windows:
*         Upgraded to Visual Studio 2013. If you need to build projects for VS 2010, add /2010 to your VPC command line.

OSX:
*         Upgraded to XCode 5.

1 files changed, 242 insertions, 0 deletions

diff --git a/mp/src/public/steam/steamvr.h b/mp/src/public/steam/steamvr.h
new file mode 100644
index 00000000..68a932dd
--- /dev/null
+++ b/mp/src/public/steam/steamvr.h
@@ -0,0 +1,242 @@
+#pragma once
+
+#include <stdint.h>
+
+namespace vr
+{
+
+#if defined(__linux__) || defined(__APPLE__) 
+	// The 32-bit version of gcc has the alignment requirement for uint64 and double set to
+	// 4 meaning that even with #pragma pack(8) these types will only be four-byte aligned.
+	// The 64-bit version of gcc has the alignment requirement for these types set to
+	// 8 meaning that unless we use #pragma pack(4) our structures will get bigger.
+	// The 64-bit structure packing has to match the 32-bit structure packing for each platform.
+#pragma pack( push, 4 )
+#else
+#pragma pack( push, 8 )
+#endif
+
+
+// right-handed system
+// +y is up
+// +x is to the right
+// -z is going away from you
+// Distance unit is  meters
+struct HmdMatrix34_t
+{
+	float m[3][4];
+};
+
+struct HmdMatrix44_t
+{
+	float m[4][4];
+};
+
+
+/** Used to return the post-distortion UVs for each color channel. 
+* UVs range from 0 to 1 with 0,0 in the upper left corner of the 
+* source render target. The 0,0 to 1,1 range covers a single eye. */
+struct DistortionCoordinates_t
+{
+	float rfRed[2];
+	float rfGreen[2];
+	float rfBlue[2];
+};
+
+
+enum Hmd_Eye
+{
+	Eye_Left = 0,
+	Eye_Right = 1
+};
+
+enum GraphicsAPIConvention
+{
+	API_DirectX = 0, // Normalized Z goes from 0 at the viewer to 1 at the far clip plane
+	API_OpenGL = 1,  // Normalized Z goes from 1 at the viewer to -1 at the far clip plane
+};
+
+enum HmdTrackingResult
+{
+	TrackingResult_Uninitialized			= 1,
+
+	TrackingResult_Calibrating_InProgress	= 100,
+	TrackingResult_Calibrating_OutOfRange	= 101,
+
+	TrackingResult_Running_OK				= 200,
+	TrackingResult_Running_OutOfRange		= 201,
+};
+
+class IHmd
+{
+public:
+
+
+	// ------------------------------------
+	// Display Methods
+	// ------------------------------------
+
+	/** Size and position that the window needs to be on the VR display. */
+	virtual void GetWindowBounds( int32_t *pnX, int32_t *pnY, uint32_t *pnWidth, uint32_t *pnHeight ) = 0;
+
+	/** Suggested size for the intermediate render target that the distortion pulls from. */
+	virtual void GetRecommendedRenderTargetSize( uint32_t *pnWidth, uint32_t *pnHeight ) = 0;
+
+	/** Gets the viewport in the frame buffer to draw the output of the distortion into */
+	virtual void GetEyeOutputViewport( Hmd_Eye eEye, uint32_t *pnX, uint32_t *pnY, uint32_t *pnWidth, uint32_t *pnHeight ) = 0;
+	
+	/** The projection matrix for the specified eye */
+	virtual HmdMatrix44_t GetProjectionMatrix( Hmd_Eye eEye, float fNearZ, float fFarZ, GraphicsAPIConvention eProjType ) = 0;
+
+	/** The components necessary to build your own projection matrix in case your
+	* application is doing something fancy like infinite Z */
+	virtual void GetProjectionRaw( Hmd_Eye eEye, float *pfLeft, float *pfRight, float *pfTop, float *pfBottom ) = 0;
+
+	/** 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. */
+	virtual DistortionCoordinates_t ComputeDistortion( Hmd_Eye eEye, float fU, float fV ) = 0;
+
+	/** 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. 
+	*/
+	virtual HmdMatrix34_t GetHeadFromEyePose( Hmd_Eye eEye ) = 0;
+
+	/** For use in simple VR apps, this method returns the concatenation of the 
+	* tracking pose and the eye matrix to get a full view matrix for each eye.
+	* This is ( GetEyeMatrix() ) * (GetWorldFromHeadPose() ^ -1 )  */
+	virtual bool GetViewMatrix( float fSecondsFromNow, HmdMatrix44_t *pMatLeftView, HmdMatrix44_t *pMatRightView, HmdTrackingResult *peResult ) = 0;
+
+	/** [D3D9 Only]
+	* Returns the adapter index that the user should pass into CreateDevice to set up D3D9 in such
+	* a way that it can go full screen exclusive on the HMD. Returns -1 if there was an error.
+	*/
+	virtual int32_t GetD3D9AdapterIndex() = 0;
+
+	/** [D3D10/11 Only]
+	* Returns the adapter index and output index that the user should pass into EnumAdapters adn EnumOutputs 
+	* to create the device and swap chain in DX10 and DX11. If an error occurs both indices will be set to -1.
+	*/
+	virtual void GetDXGIOutputInfo( int32_t *pnAdapterIndex, int32_t *pnAdapterOutputIndex ) = 0;
+
+	// ------------------------------------
+	// Tracking Methods
+	// ------------------------------------
+
+	/** The pose that the tracker thinks that the HMD will be in at the specified
+	* number of seconds into the future. Pass 0 to get the current state. 
+	*
+	* This is roughly analogous to the inverse of the view matrix in most applications, though 
+	* many games will need to do some additional rotation or translation on top of the rotation
+	* and translation provided by the head pose.
+	*
+	* If this function returns true the pose has been populated with a pose that can be used by the application.
+	* Check peResult for details about the pose, including messages that should be displayed to the user.
+	*/
+	virtual bool GetTrackerFromHeadPose( float fPredictedSecondsFromNow, HmdMatrix34_t *pmPose, HmdTrackingResult *peResult ) = 0;
+
+	/** Passes back the pose matrix from the last successful call to GetWorldFromHeadPose(). Returns true if that matrix is 
+	* valid (because there has been a previous successful pose.) */
+	virtual bool GetLastTrackerFromHeadPose( HmdMatrix34_t *pmPose ) = 0;
+
+	/** Returns true if the tracker for this HMD will drift the Yaw component of its pose over time regardless of
+	* actual head motion. This is true for gyro-based trackers with no ground truth. */
+	virtual bool WillDriftInYaw() = 0;
+
+	/** Sets the zero pose for the tracker coordinate system. After this call all WorldFromHead poses will be relative 
+	* to the pose whenever this was called. The new zero coordinate system will not change the fact that the Y axis is
+	* up in the real world, so the next pose returned from GetWorldFromHeadPose after a call to ZeroTracker may not be
+	* exactly an identity matrix. */
+	virtual void ZeroTracker() = 0;
+
+	/** Returns the zero pose for the tracker coordinate system. If the tracker has never had a valid pose, this
+	* will be an identity matrix. */
+	virtual HmdMatrix34_t GetTrackerZeroPose() = 0;
+
+	// ------------------------------------
+	// Administrative methods
+	// ------------------------------------
+
+	/** The ID of the driver this HMD uses as a UTF-8 string. Returns the length of the ID in bytes. If 
+	* the buffer is not large enough to fit the ID an empty string will be returned. In general, 128 bytes
+	* will be enough to fit any ID. */
+	virtual uint32_t GetDriverId( char *pchBuffer, uint32_t unBufferLen ) = 0;
+
+	/** The ID of this display within its driver this HMD uses as a UTF-8 string. Returns the length of the ID in bytes. If 
+	* the buffer is not large enough to fit the ID an empty string will be returned. In general, 128 bytes
+	* will be enough to fit any ID. */
+	virtual uint32_t GetDisplayId( char *pchBuffer, uint32_t unBufferLen ) = 0;
+};
+
+static const char * const IHmd_Version = "IHmd_004";
+
+/** error codes returned by Vr_Init */
+enum HmdError
+{
+	HmdError_None = 0,
+
+	HmdError_Init_InstallationNotFound	= 100,
+	HmdError_Init_InstallationCorrupt	= 101,
+	HmdError_Init_VRClientDLLNotFound	= 102,
+	HmdError_Init_FileNotFound			= 103,
+	HmdError_Init_FactoryNotFound		= 104,
+	HmdError_Init_InterfaceNotFound		= 105,
+	HmdError_Init_InvalidInterface		= 106,
+	HmdError_Init_UserConfigDirectoryInvalid = 107,
+	HmdError_Init_HmdNotFound			= 108,
+	HmdError_Init_NotInitialized		= 109,
+
+	HmdError_Driver_Failed = 200,
+
+	HmdError_IPC_ServerInitFailed		= 300,
+	HmdError_IPC_ConnectFailed			= 301,
+	HmdError_IPC_SharedStateInitFailed	= 302,
+
+};
+
+
+// figure out how to import from the VR API dll
+#if defined(_WIN32)
+
+#ifdef VR_API_EXPORT
+#define VR_INTERFACE extern "C" __declspec( dllexport )
+#else
+#define VR_INTERFACE extern "C" __declspec( dllimport )
+#endif
+
+#elif defined(GNUC) || defined(COMPILER_GCC)
+
+#ifdef VR_API_EXPORT
+#define VR_INTERFACE extern "C" __attribute__((visibility("default")))
+#else
+#define VR_INTERFACE extern "C" 
+#endif
+
+#else
+#error "Unsupported Platform."
+#endif
+
+
+
+
+/** Finds the active installation of the VR API and initializes it. The priority for figuring 
+* out where to load vrclient from are:
+*  1. The convar "VR_OVERRIDE", which should contain an absolute path to the root of
+*     an vr API directory. 
+*  2. The pchVROverride argument. This should be an absolute path or a path relative to
+*     the current executable.
+*  3. The path "./vr" relative to the current executable's path.
+*
+* Each of these paths are to the "root" of the VR API install. That's the directory with 
+* the "drivers" directory and a platform (i.e. "win32") directory in it, not the directory with the DLL itself.
+*/
+VR_INTERFACE IHmd *VR_Init( HmdError *peError );
+
+/** unloads vrclient.dll. Any interface pointers from the interface are 
+* invalid after this point */
+VR_INTERFACE void VR_Shutdown( );
+
+#pragma pack( pop )
+
+
+}
\ No newline at end of file