add interaction profile changed event, support velocities and expose Space(Location/Velocity)Flags as components

Signed-off-by: Schmarni <marnistromer@gmail.com>

crates/bevy_xr/src/spaces.rs

@@ -3,19 +3,29 @@ use bevy::{
     render::{extract_component::ExtractComponent, extract_resource::ExtractResource},
 };
 
-use crate::types::XrPose;
-
 /// Any Spaces will be invalid after the owning session exits
 #[repr(transparent)]
 #[derive(Clone, Copy, Hash, PartialEq, Eq, Reflect, Debug, Component, ExtractComponent)]
 pub struct XrSpace(u64);
 
-// Does repr(transparent) even make sense here?
-#[repr(transparent)]
-#[derive(
-    Clone, Copy, PartialEq, Reflect, Debug, Component, ExtractComponent, Default, Deref, DerefMut,
-)]
-pub struct XrSpatialOffset(pub XrPose);
+#[derive(Clone, Copy, Reflect, Debug, Component, ExtractComponent, Default)]
+pub struct XrVelocity {
+    /// Velocity of a space relative to it's reference space
+    pub linear: Vec3,
+    /// Angular Velocity of a space relative to it's reference space
+    /// the direction of the vector is parrelel to the axis of rotation,
+    /// the magnitude is the relative angular speed in radians per second
+    /// the vector follows the right-hand rule for torque/rotation
+    pub angular: Vec3,
+}
+impl XrVelocity {
+    pub const fn new() -> XrVelocity {
+        XrVelocity {
+            linear: Vec3::ZERO,
+            angular: Vec3::ZERO,
+        }
+    }
+}
 
 #[derive(Event, Clone, Copy, Deref, DerefMut)]
 pub struct XrDestroySpace(pub XrSpace);