fixed stuff for steamvr openxr to not crash

examples/xr.rs

@@ -81,18 +81,17 @@ fn hands(
     frame_state: Res<XrFrameState>,
     xr_input: Res<XrInput>,
 ) {
+    let mut func = || -> anyhow::Result<()> {
         let frame_state = *frame_state.lock().unwrap();
 
         let right_controller = oculus_controller
             .grip_space
             .right
-            .relate(&**&xr_input.stage, frame_state.predicted_display_time)
-            .unwrap();
+            .relate(&**&xr_input.stage, frame_state.predicted_display_time)?;
         let left_controller = oculus_controller
             .grip_space
             .left
-            .relate(&**&xr_input.stage, frame_state.predicted_display_time)
-            .unwrap();
+            .relate(&**&xr_input.stage, frame_state.predicted_display_time)?;
         gizmos.rect(
             right_controller.0.pose.position.to_vec3(),
             right_controller.0.pose.orientation.to_quat(),
@@ -105,4 +104,8 @@ fn hands(
             Vec2::new(0.05, 0.2),
             Color::YELLOW_GREEN,
         );
+        Ok(())
+    };
+
+    let _ = func();
 }

src/lib.rs

@@ -322,12 +322,18 @@ pub fn locate_views(
     xr_frame_state: Res<XrFrameState>,
 ) {
     let _span = info_span!("xr_locate_views").entered();
-    *views.lock().unwrap() = session
+    *views.lock().unwrap() = match session
         .locate_views(
             VIEW_TYPE,
             xr_frame_state.lock().unwrap().predicted_display_time,
             &input.stage,
         )
-        .unwrap()
+    {
+        Ok(this) => this,
+        Err(err) => {
+            warn!("error: {}", err);
+            return;
+        }
+    }
         .1;
 }

src/resources.rs

@@ -134,6 +134,10 @@ impl<G: xr::Graphics> SwapchainInner<G> {
             },
         };
         let swapchain = self.handle.lock().unwrap();
+        if views.len() == 0 {
+            warn!("views are len of 0");
+            return Ok(())
+        }
         self.stream.lock().unwrap().end(
             predicted_display_time,
             environment_blend_mode,

src/xr_input/mod.rs

@@ -59,7 +59,7 @@ fn action_set_system(action_sets: Res<ActionSets>, session: Res<XrSession>) {
     for i in &action_sets.0 {
         active_action_sets.push(openxr::ActiveActionSet::new(i));
     }
-    info!("action sets: {:#?}", action_sets.0.len());
+    //info!("action sets: {:#?}", action_sets.0.len());
     match session.sync_actions(&active_action_sets) {
         Err(err) => {
             warn!("{}", err);