fixed shakiness B)

src/graphics/vulkan.rs

@@ -40,7 +40,7 @@ pub fn initialize_xr_graphics(
 )> {
     use wgpu_hal::{api::Vulkan as V, Api};
 
-    let xr_entry = unsafe { xr::Entry::load() }?;
+    let xr_entry = xr::Entry::linked();
 
     let available_extensions = xr_entry.enumerate_extensions()?;
     assert!(available_extensions.khr_vulkan_enable2);

src/lib.rs

@@ -11,7 +11,7 @@ use bevy::app::PluginGroupBuilder;
 use bevy::ecs::system::SystemState;
 use bevy::prelude::*;
 use bevy::render::camera::{ManualTextureView, ManualTextureViewHandle, ManualTextureViews};
-use bevy::render::pipelined_rendering::RenderExtractApp;
+use bevy::render::pipelined_rendering::{RenderExtractApp, PipelinedRenderingPlugin};
 use bevy::render::renderer::{
     render_system, RenderAdapter, RenderAdapterInfo, RenderDevice, RenderQueue,
 };
@@ -105,7 +105,7 @@ impl Plugin for OpenXrPlugin {
                 render_adapter,
                 Mutex::new(instance),
             ),
-        }));
+        }).disable::<PipelinedRenderingPlugin>());
     }
 
     fn ready(&self, app: &App) -> bool {

src/xr_input/mod.rs

@@ -3,6 +3,7 @@ pub mod oculus_touch;
 pub mod xr_camera;
 
 use crate::resources::XrSession;
+use crate::xr_begin_frame;
 use crate::xr_input::controllers::XrControllerType;
 use crate::xr_input::oculus_touch::{setup_oculus_controller, ActionSets};
 use crate::xr_input::xr_camera::{
@@ -38,7 +39,7 @@ impl Plugin for OpenXrInput {
             }
         }
         app.add_systems(PreUpdate, action_set_system);
-        app.add_systems(PreUpdate, xr_camera_head_sync);
+        app.add_systems(PreUpdate, xr_camera_head_sync.after(xr_begin_frame));
         app.add_systems(
             PostUpdate,
             update_frusta::<XRProjection>