feat(input): hand

src/objects/input/mod.rs

@@ -1 +1,2 @@
 pub mod mouse_pointer;
+pub mod sk_hand;

src/objects/input/sk_hand.rs

@@ -0,0 +1,72 @@
+use crate::nodes::{
+	input::{InputMethod, InputType},
+	spatial::Spatial,
+};
+use glam::Mat4;
+use libstardustxr::schemas::{common::JointT, input_hand::HandT};
+use std::sync::{Arc, Weak};
+use stereokit::{
+	input::{Handed, Joint as SkJoint},
+	StereoKit,
+};
+
+fn convert_joint(joint: SkJoint) -> JointT {
+	JointT {
+		position: joint.position.into(),
+		rotation: joint.orientation.into(),
+		radius: joint.radius,
+	}
+}
+
+pub struct SkHand {
+	hand: Arc<InputMethod>,
+	handed: Handed,
+}
+impl SkHand {
+	pub fn new(handed: Handed) -> Self {
+		let mut sk_hand = HandT::default();
+		sk_hand.right = handed == Handed::Right;
+		SkHand {
+			hand: InputMethod::new(
+				Spatial::new(Weak::new(), None, Mat4::IDENTITY),
+				InputType::Hand(Box::new(sk_hand)),
+			),
+			handed,
+		}
+	}
+	pub fn update(&mut self, sk: &StereoKit) {
+		if let InputType::Hand(hand) = &mut *self.hand.specialization.lock() {
+			let sk_hand = *sk.input_hand(self.handed);
+			// *self.hand.enabled.lock() = sk_hand.tracked_state.is_active();
+			// if sk_hand.tracked_state.is_active() {
+			hand.thumb.tip = convert_joint(sk_hand.fingers[0][4]);
+			hand.thumb.distal = convert_joint(sk_hand.fingers[0][3]);
+			hand.thumb.proximal = convert_joint(sk_hand.fingers[0][2]);
+			hand.thumb.metacarpal = convert_joint(sk_hand.fingers[0][1]);
+
+			for (finger, sk_finger) in [
+				(&mut hand.index, sk_hand.fingers[1]),
+				(&mut hand.middle, sk_hand.fingers[2]),
+				(&mut hand.ring, sk_hand.fingers[3]),
+				(&mut hand.little, sk_hand.fingers[4]),
+			] {
+				finger.tip = convert_joint(sk_finger[4]);
+				finger.distal = convert_joint(sk_finger[3]);
+				finger.intermediate = convert_joint(sk_finger[2]);
+				finger.proximal = convert_joint(sk_finger[1]);
+				finger.metacarpal = convert_joint(sk_finger[0]);
+			}
+
+			hand.palm.position = sk_hand.palm.position.into();
+			hand.palm.rotation = sk_hand.palm.orientation.into();
+			hand.palm.radius = (sk_hand.fingers[2][0].radius + sk_hand.fingers[2][1].radius) * 0.5;
+
+			hand.wrist.position = sk_hand.wrist.position.into();
+			hand.wrist.rotation = sk_hand.wrist.orientation.into();
+			hand.wrist.radius = (sk_hand.fingers[0][0].radius + sk_hand.fingers[4][0].radius) * 0.5;
+
+			hand.elbow = None;
+			// }
+		}
+	}
+}