public void UpdateOverlay(SteamVR vr)
{
if (texture != null)
{
var settings = new Compositor_OverlaySettings();
settings.size = (uint)System.Runtime.InteropServices.Marshal.SizeOf(typeof(Compositor_OverlaySettings));
settings.curved = curved;
settings.antialias = antialias;
settings.scale = scale;
settings.distance = distance;
settings.alpha = alpha;
settings.uOffset = uvOffset.x;
settings.vOffset = uvOffset.y;
settings.uScale = uvOffset.z;
settings.vScale = uvOffset.w;
settings.gridDivs = gridDivs;
settings.gridWidth = gridWidth;
settings.gridScale = gridScale;
var vrcam = SteamVR_Render.Top();
if (vrcam != null && vrcam.origin != null)
{
var offset = new SteamVR_Utils.RigidTransform(vrcam.origin, transform);
offset.pos.x /= vrcam.origin.localScale.x;
offset.pos.y /= vrcam.origin.localScale.y;
offset.pos.z /= vrcam.origin.localScale.z;
settings.transform = offset.ToHmdMatrix44();
// The overlay transform is always rendered in standing space, so we transform it here
// to seated space when using the seated universe origin in Unity.
if (SteamVR_Render.instance.trackingSpace == TrackingUniverseOrigin.TrackingUniverseSeated)
{
var seated = vr.hmd.GetSeatedZeroPoseToStandingAbsoluteTrackingPose();
offset = new SteamVR_Utils.RigidTransform(seated) * offset;
settings.transform = offset.ToHmdMatrix44();
}
}
vr.compositor.SetOverlay(texture.GetNativeTexturePtr(), ref settings);
}
else
{
vr.compositor.ClearOverlay();
}
}
internal static extern void SteamAPI_vr_IVRCompositor_SetOverlayFromFile(IntPtr instancePtr, string pchFilePath, ref Compositor_OverlaySettings pSettings);
internal static extern void SteamAPI_vr_IVRCompositor_SetOverlayRaw(IntPtr instancePtr, IntPtr buffer, uint width, uint height, uint depth, ref Compositor_OverlaySettings pSettings);
internal static extern void SteamAPI_vr_IVRCompositor_SetOverlay(IntPtr instancePtr, IntPtr pTexture, ref Compositor_OverlaySettings pSettings);
internal static extern void SteamAPI_vr_IVRCompositor_GetOverlayDefaults(IntPtr instancePtr, ref Compositor_OverlaySettings pSettings);
internal static extern bool VR_IVRCompositor_ComputeOverlayIntersection(IntPtr instancePtr, ref Compositor_OverlaySettings pSettings, float fAspectRatio, TrackingUniverseOrigin eOrigin, HmdVector3_t vSource, HmdVector3_t vDirection, ref HmdVector2_t pvecIntersectionUV, ref HmdVector3_t pvecIntersectionTrackingSpace);