/// <summary>
/// Updates the HMD.
/// </summary>
private void UpdateHMD()
{
CVRSystem hmd = Hmd;
if (renderPoses.Length > 0)
{
ETrackingResult result = renderPoses[0].eTrackingResult;
VRInitializing = result == ETrackingResult.Uninitialized;
VRCalibrating = result == ETrackingResult.Calibrating_InProgress || result == ETrackingResult.Calibrating_OutOfRange;
VROutOfRange = result == ETrackingResult.Running_OutOfRange || result == ETrackingResult.Calibrating_OutOfRange;
if (result == ETrackingResult.Running_OK)
{
// Get poses for each eye (left, right, center)
renderPoses[0].ToMatrix(out Matrix mCenter);
mCenter.ToVRPose(out VRPose center);
EyesProperties[2].Pose = center;
for (int i = 0; i < 2; i++)
{
VREye eye = EyesProperties[i];
VREyeTexture texture = eye.Texture;
hmd.GetProjectionMatrix((EVREye)i, texture.NearPlane, texture.FarPlane).ToMatrix(out Matrix projection);
projection.Invert();
eye.Projection = projection;
hmd.GetEyeToHeadTransform((EVREye)i).ToMatrix(out Matrix mOffset);
mOffset *= mCenter;
mOffset.ToVRPose(out VRPose pose);
eye.Pose = pose;
}
}
}
}
/// <summary>
/// Initializes the rendering stuff.
/// </summary>
private void InitRendering()
{
Debug.Log("[VR] rendering init begin");
// Get HMD display size
uint w = 0;
uint h = 0;
Hmd.GetRecommendedRenderTargetSize(ref w, ref h);
int width = (int)w;
int height = (int)h;
// Create RT for each eye
//TODO: Combine two RTs to one with [w*2, h]
leftEyeRenderTarget = RenderTarget.New();
leftEyeRenderTarget.Init(PixelFormat.R8G8B8A8_UNorm, width, height);
rightEyeRenderTarget = RenderTarget.New();
rightEyeRenderTarget.Init(PixelFormat.R8G8B8A8_UNorm, width, height);
// Create texture structs for OpenVR
leftEyeTexture = new Texture_t
{
handle = leftEyeRenderTarget.NativePtr,
eColorSpace = EColorSpace.Auto,
eType = ETextureType.DirectX
};
rightEyeTexture = new Texture_t
{
handle = rightEyeRenderTarget.NativePtr,
eColorSpace = EColorSpace.Auto,
eType = ETextureType.DirectX
};
// Calculate bounds and FOV
// bounds and FOV calculation could be replaced with uv [0,0] - [1,1] and custom projection matrix from eye.Projection
float l_left = 0.0f, l_right = 0.0f, l_top = 0.0f, l_bottom = 0.0f;
Hmd.GetProjectionRaw(EVREye.Eye_Left, ref l_left, ref l_right, ref l_top, ref l_bottom);
float r_left = 0.0f, r_right = 0.0f, r_top = 0.0f, r_bottom = 0.0f;
Hmd.GetProjectionRaw(EVREye.Eye_Right, ref r_left, ref r_right, ref r_top, ref r_bottom);
var tanHalfFov = new Vector2(
Mathf.Max(-l_left, l_right, -r_left, r_right),
Mathf.Max(-l_top, l_bottom, -r_top, r_bottom));
leftEyeTextureBounds = new VRTextureBounds_t
{
uMin = 0.5f + 0.5f * l_left / tanHalfFov.X,
uMax = 0.5f + 0.5f * l_right / tanHalfFov.X,
vMin = 0.5f - 0.5f * l_bottom / tanHalfFov.Y,
vMax = 0.5f - 0.5f * l_top / tanHalfFov.Y
};
rightEyeTextureBounds = new VRTextureBounds_t
{
uMin = 0.5f + 0.5f * r_left / tanHalfFov.X,
uMax = 0.5f + 0.5f * r_right / tanHalfFov.X,
vMin = 0.5f - 0.5f * r_bottom / tanHalfFov.Y,
vMax = 0.5f - 0.5f * r_top / tanHalfFov.Y
};
FieldOfView = 2.0f * Mathf.Atan(tanHalfFov.Y) * Mathf.Rad2Deg;
///////
// Create Eye textures
EyeTextures = new VREyeTexture[2];
EyeTextures[0] = new VREyeTexture
{
Viewport = new Viewport(0, 0, width, height),
RenderTarget = leftEyeRenderTarget
};
EyeTextures[1] = new VREyeTexture
{
Viewport = new Viewport(0, 0, width, height),
RenderTarget = rightEyeRenderTarget
};
// HMDMirrorRenderTarget = leftEyeRenderTarget;
// Create render tasks
leftEyeRenderTask = RenderTask.Create <SceneRenderTask>();
// Camera
leftEyeRenderTask.Output = leftEyeRenderTarget;
leftEyeRenderTask.End += (task, ctx) => { Submit(EVREye.Eye_Left, ref leftEyeTexture, ref leftEyeTextureBounds); };
rightEyeRenderTask = RenderTask.Create <SceneRenderTask>();
// Camera
rightEyeRenderTask.Output = rightEyeRenderTarget;
rightEyeRenderTask.End += (task, ctx) => { Submit(EVREye.Eye_Right, ref rightEyeTexture, ref rightEyeTextureBounds); };
// Create eyes
EyesProperties = new VREye[3];
for (int i = 0; i < EyesProperties.Length; i++)
{
VREye eye = new VREye();
if (i < EyeTextures.Length)
{
eye.Texture = EyeTextures[i];
}
EyesProperties[i] = eye;
}
Debug.Log("[VR] rendering init end");
IsConnected = true;
}
