Fix gimbal-lock when controller pointed up or down

Compare old and new pose via a relative quaternion rather than relative yaw, then calculate the resulting yaw-difference from the quaternion in one go.
2019-01-17 02:32:08 +09:00
parent 0c0a616691
commit 47920bfa74
4 changed files with 71 additions and 18 deletions
@@ -67,9 +67,9 @@ private:
    bool m_lockYToggle = false;
    bool m_lockZToggle = false;
    std::chrono::system_clock::time_point lastMoveButtonClick[2];
-    // Set to -10.0 when last hand is invalid.
-    double lastHandYaw = -10.0;
-    double handYaw;
+    // Set lastHandQuaternion.w to -1000.0 when last hand is invalid.
+    vr::HmdQuaternion_t lastHandQuaternion = { -1000.0, 0.0, 0.0, 0.0 };
+    vr::HmdQuaternion_t handQuaternion;

    unsigned settingsUpdateCounter = 0;