/// <summary>
/// CreateResources is called when the VirtualRealityProvider is initialized and should create the DirectX resources.
/// </summary>
/// <remarks>
/// <para>
/// <b>CreateResources</b> is called when the VirtualRealityProvider is initialized and should create the DirectX resources.
/// </para>
/// <para>
/// This method is called after this virtual reality provider is registered with calling the <see cref="DXScene.InitializeVirtualRealityRendering"/> method.
/// This method then calls the <see cref="DXSceneResource.InitializeResources"/> and the <see cref="VirtualRealityProviderBase.OnInitializeResources"/>.
/// OnInitializeResources calls the this CreateResources method and then <see cref="VirtualRealityProviderBase.InitializeRenderingSteps"/> method.
/// </para>
/// <para>
/// This method usually creates pixel shaders and constant buffers.
/// Other resources (back buffers and views) are usually created in <see cref="VirtualRealityProviderBase.UpdateRenderingContext"/> where the size of the current back buffer is compared with the size of back buffers for virtual reality.
/// </para>
/// </remarks>
/// <param name="dxScene">parent DXScene</param>
protected override void CreateResources(DXScene dxScene)
{
if (_eyeTextureSwapChains != null)
{
if (_eyeTextureSwapChains[0] != null)
{
_eyeTextureSwapChains[0].Dispose();
}
if (_eyeTextureSwapChains[1] != null)
{
_eyeTextureSwapChains[1].Dispose();
}
}
else
{
_eyeTextureSwapChains = new OculusTextureSwapChain[2];
}
_eyeTextureSwapChains[0] = new OculusTextureSwapChain(_ovr,
_sessionPtr,
dxScene.Device,
EyeType.Left,
Format.B8G8R8A8_UNorm_SRgb,
_ovr.GetFovTextureSize(_sessionPtr, EyeType.Left, _hmdDesc.DefaultEyeFov[0], 1.0f),
createDepthStencilView: true,
isDebugDevice: dxScene.DXDevice.IsDebugDevice);
_eyeTextureSwapChains[1] = new OculusTextureSwapChain(_ovr,
_sessionPtr,
dxScene.Device,
EyeType.Left,
Format.B8G8R8A8_UNorm_SRgb,
_ovr.GetFovTextureSize(_sessionPtr, EyeType.Right, _hmdDesc.DefaultEyeFov[1], 1.0f),
createDepthStencilView: true,
isDebugDevice: dxScene.DXDevice.IsDebugDevice);
_layerShared = new LayerEyeFov();
_layerShared.Header = new LayerHeader()
{
Type = LayerType.EyeFov,
Flags = LayerFlags.HighQuality
};
// Specify the texture to show on the HMD.
_layerShared.ColorTextureLeft = _eyeTextureSwapChains[0].TextureSwapChainPtr;
_layerShared.ColorTextureRight = _eyeTextureSwapChains[1].TextureSwapChainPtr;
_layerShared.ViewportLeft.Position = new Vector2i(0, 0);
_layerShared.ViewportLeft.Size = _eyeTextureSwapChains[0].Size;
_layerShared.ViewportRight.Position = new Vector2i(0, 0);
_layerShared.ViewportRight.Size = _eyeTextureSwapChains[1].Size;
_layerShared.FovLeft = _hmdDesc.DefaultEyeFov[0];
_layerShared.FovRight = _hmdDesc.DefaultEyeFov[1];
_eyeRenderDesc[0] = _ovr.GetRenderDesc(_sessionPtr, EyeType.Left, _hmdDesc.DefaultEyeFov[0]);
_hmdToEyeOffset[1] = _eyeRenderDesc[1].HmdToEyePose.Position;
_eyeRenderDesc[1] = _ovr.GetRenderDesc(_sessionPtr, EyeType.Right, _hmdDesc.DefaultEyeFov[1]);
_hmdToEyeOffset[1] = _eyeRenderDesc[1].HmdToEyePose.Position;
// Create MSAA back buffer if needed
UpdateMsaaBackBuffer(_eyeTextureSwapChains[0].Size.Width, _eyeTextureSwapChains[0].Size.Height, _multisamplingCount);
_mirrorTextureDesc = new MirrorTextureDesc()
{
Format = SharpDXHelpers.GetTextureFormat(dxScene.BackBufferDescription.Format),
Height = dxScene.BackBufferDescription.Height,
MiscFlags = dxScene.BackBufferDescription.MipLevels != 1 ? TextureMiscFlags.AllowGenerateMips : TextureMiscFlags.None,
Width = dxScene.BackBufferDescription.Width
};
// FloorLevel will give tracking poses where the floor height is 0
_ovr.SetTrackingOriginType(_sessionPtr, TrackingOrigin.EyeLevel);
IntPtr mirrorTexturePtr;
var result = _ovr.CreateMirrorTextureDX(_sessionPtr, dxScene.Device.NativePointer, ref _mirrorTextureDesc, out mirrorTexturePtr);
if (result < Ab3d.OculusWrap.Result.Success)
{
var lastError = _ovr.GetLastErrorInfo();
throw new OvrException("Failed to create Oculus mirror texture: " + lastError.ErrorString, lastError.Result);
}
_mirrorTexture = new OculusMirrorTexture(_ovr, _sessionPtr, mirrorTexturePtr);
// Retrieve the Direct3D texture contained in the Oculus MirrorTexture.
IntPtr mirrorTextureComPtr;
result = _mirrorTexture.GetBufferDX(typeof(Texture2D).GUID, out mirrorTextureComPtr);
if (result < Ab3d.OculusWrap.Result.Success)
{
var lastError = _ovr.GetLastErrorInfo();
throw new OvrException("Failed to retrieve the texture from the created mirror texture buffer: " + lastError.ErrorString, lastError.Result);
}
// Create a managed Texture2D, based on the unmanaged texture pointer.
_mirrorTextureDX = new Texture2D(mirrorTextureComPtr);
if (dxScene.DXDevice.IsDebugDevice)
{
_mirrorTextureDX.DebugName = "OculusMirrorTexture";
}
// To prevent DirectX from rendering more then one frame in the background,
// we need to set the MaximumFrameLatency to 1.
// This prevents occasional dropped frames in Oculus Rift.
var dxgiDevice = dxScene.Device.QueryInterface <SharpDX.DXGI.Device1>();
if (dxgiDevice != null)
{
dxgiDevice.MaximumFrameLatency = 1;
dxgiDevice.Dispose();
}
_frameIndex = 0;
_matrixCamera = new MatrixCamera();
}