From e846014a88551d4e20c94cd23e66d98f6d979095 Mon Sep 17 00:00:00 2001
From: galister <22305755+galister@users.noreply.github.com>
Date: Sun, 4 Feb 2024 03:34:50 +0100
Subject: [PATCH] openxr haptics

---
 src/backend/openxr/input.rs | 20 +++++++++++++++++++-
 src/backend/openxr/mod.rs   |  2 +-
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/src/backend/openxr/input.rs b/src/backend/openxr/input.rs
index e5bdc40..ff93223 100644
--- a/src/backend/openxr/input.rs
+++ b/src/backend/openxr/input.rs
@@ -3,7 +3,10 @@ use std::time::{Duration, Instant};
 use glam::{bool, Affine3A, Quat, Vec3};
 use openxr as xr;
 
-use crate::{backend::input::Pointer, state::AppState};
+use crate::{
+    backend::input::{Haptics, Pointer},
+    state::AppState,
+};
 
 use super::XrState;
 
@@ -77,6 +80,21 @@ impl OpenXrInputSource {
         }
     }
 
+    pub fn haptics(&self, xr: &XrState, hand: usize, haptics: &Haptics) {
+        let action = &self.hands[hand].source.action_haptics;
+
+        let duration_nanos = (haptics.duration as f64) * 1_000_000_000.0;
+
+        let _ = action.apply_feedback(
+            &xr.session,
+            xr::Path::NULL,
+            &xr::HapticVibration::new()
+                .amplitude(haptics.intensity)
+                .frequency(haptics.frequency)
+                .duration(xr::Duration::from_nanos(duration_nanos as _)),
+        );
+    }
+
     pub fn update(&self, xr: &XrState, state: &mut AppState) {
         xr.session
             .sync_actions(&[(&self.action_set).into()])
diff --git a/src/backend/openxr/mod.rs b/src/backend/openxr/mod.rs
index fe2e0b1..ec212ce 100644
--- a/src/backend/openxr/mod.rs
+++ b/src/backend/openxr/mod.rs
@@ -233,7 +233,7 @@ pub fn openxr_run(running: Arc<AtomicBool>) -> Result<(), BackendError> {
                 &app_state.input_state.hmd,
             );
             if let Some(haptics) = haptics {
-                //TODO!
+                input_source.haptics(&xr_state, idx, haptics);
             }
         }