add support for hand tracking and configurable reference spaces

crates/bevy_xr/Cargo.toml

@@ -7,4 +7,4 @@ edition = "2021"
 
 [dependencies]
 bevy.workspace = true
-bevy_xr_macros.path = "macros"
+bevy_xr_macros.path = "macros"

crates/bevy_xr/src/hands.rs

@@ -0,0 +1,129 @@
+use bevy::{ecs::component::Component, math::bool, prelude::{Deref, DerefMut}};
+
+#[repr(transparent)]
+#[derive(Clone, Copy, Component, Debug,DerefMut,Deref)]
+pub struct HandBoneRadius(pub f32);
+
+#[repr(u8)]
+#[derive(Clone, Copy, Component, Debug)]
+pub enum HandBone {
+    Palm = 0,
+    Wrist = 1,
+    ThumbMetacarpal = 2,
+    ThumbProximal = 3,
+    ThumbDistal = 4,
+    ThumbTip = 5,
+    IndexMetacarpal = 6,
+    IndexProximal = 7,
+    IndexIntermediate = 8,
+    IndexDistal = 9,
+    IndexTip = 10,
+    MiddleMetacarpal = 11,
+    MiddleProximal = 12,
+    MiddleIntermediate = 13,
+    MiddleDistal = 14,
+    MiddleTip = 15,
+    RingMetacarpal = 16,
+    RingProximal = 17,
+    RingIntermediate = 18,
+    RingDistal = 19,
+    RingTip = 20,
+    LittleMetacarpal = 21,
+    LittleProximal = 22,
+    LittleIntermediate = 23,
+    LittleDistal = 24,
+    LittleTip = 25,
+}
+
+impl HandBone {
+    pub const fn is_metacarpal(&self) -> bool {
+        matches!(
+            self,
+            HandBone::ThumbMetacarpal
+                | HandBone::IndexMetacarpal
+                | HandBone::MiddleMetacarpal
+                | HandBone::RingMetacarpal
+                | HandBone::LittleMetacarpal
+        )
+    }
+    pub const fn is_thumb(&self) -> bool {
+        matches!(
+            self,
+            HandBone::ThumbMetacarpal
+                | HandBone::ThumbProximal
+                | HandBone::ThumbDistal
+                | HandBone::ThumbTip
+        )
+    }
+    pub const fn is_index(&self) -> bool {
+        matches!(
+            self,
+            HandBone::IndexMetacarpal
+                | HandBone::IndexProximal
+                | HandBone::IndexIntermediate
+                | HandBone::IndexDistal
+                | HandBone::IndexTip
+        )
+    }
+    pub const fn is_middle(&self) -> bool {
+        matches!(
+            self,
+            HandBone::MiddleMetacarpal
+                | HandBone::MiddleProximal
+                | HandBone::MiddleIntermediate
+                | HandBone::MiddleDistal
+                | HandBone::MiddleTip
+        )
+    }
+    pub const fn is_ring(&self) -> bool {
+        matches!(
+            self,
+            HandBone::RingMetacarpal
+                | HandBone::RingProximal
+                | HandBone::RingIntermediate
+                | HandBone::RingDistal
+                | HandBone::RingTip
+        )
+    }
+    pub const fn is_little(&self) -> bool {
+        matches!(
+            self,
+            HandBone::LittleMetacarpal
+                | HandBone::LittleProximal
+                | HandBone::LittleIntermediate
+                | HandBone::LittleDistal
+                | HandBone::LittleTip
+        )
+    }
+
+    pub const fn get_all_bones() -> [HandBone; 26] {
+        [
+            HandBone::Palm,
+            HandBone::Wrist,
+            HandBone::ThumbMetacarpal,
+            HandBone::ThumbProximal,
+            HandBone::ThumbDistal,
+            HandBone::ThumbTip,
+            HandBone::IndexMetacarpal,
+            HandBone::IndexProximal,
+            HandBone::IndexIntermediate,
+            HandBone::IndexDistal,
+            HandBone::IndexTip,
+            HandBone::MiddleMetacarpal,
+            HandBone::MiddleProximal,
+            HandBone::MiddleIntermediate,
+            HandBone::MiddleDistal,
+            HandBone::MiddleTip,
+            HandBone::RingMetacarpal,
+            HandBone::RingProximal,
+            HandBone::RingIntermediate,
+            HandBone::RingDistal,
+            HandBone::RingTip,
+            HandBone::LittleMetacarpal,
+            HandBone::LittleProximal,
+            HandBone::LittleIntermediate,
+            HandBone::LittleDistal,
+            HandBone::LittleTip,
+        ]
+    }
+}

crates/bevy_xr/src/lib.rs

@@ -1,4 +1,5 @@
 pub mod actions;
 pub mod camera;
 pub mod session;
-pub mod types;
+pub mod types;
+pub mod hands;