working pipelined rendering

crates/bevy_openxr/src/openxr/features/handtracking.rs

@@ -6,6 +6,7 @@ use bevy_xr::{
 };
 use openxr::SpaceLocationFlags;
 
+use crate::resources::Pipelined;
 use crate::{
     init::OxrTrackingRoot,
     reference_space::{OxrPrimaryReferenceSpace, OxrReferenceSpace},
@@ -139,12 +140,22 @@ fn locate_hands(
         &OxrHandBoneEntities,
     )>,
     mut bone_query: Query<(&HandBone, &mut HandBoneRadius, &mut Transform)>,
+    pipelined: Option<Res<Pipelined>>,
 ) {
     for (tracker, ref_space, hand_entities) in &tracker_query {
         let ref_space = ref_space.map(|v| &v.0).unwrap_or(&default_ref_space.0);
         // relate_hand_joints also provides velocities
-        let joints = match ref_space.locate_hand_joints(tracker, frame_state.predicted_display_time)
-        {
+        let joints = match ref_space.locate_hand_joints(
+            tracker,
+            if pipelined.is_some() {
+                openxr::Time::from_nanos(
+                    frame_state.predicted_display_time.as_nanos()
+                        + frame_state.predicted_display_period.as_nanos(),
+                )
+            } else {
+                frame_state.predicted_display_time
+            },
+        ) {
             Ok(Some(v)) => v,
             Ok(None) => continue,
             Err(openxr::sys::Result::ERROR_EXTENSION_NOT_PRESENT) => {