hello_xr: Add Valve Index bindings

Author: ChristophHaag

src/tests/hello_xr/openxr_program.cpp

@@ -413,6 +413,7 @@ struct OpenXrProgram : IOpenXrProgram {
         std::array<XrPath, Side::COUNT> posePath;
         std::array<XrPath, Side::COUNT> hapticPath;
         std::array<XrPath, Side::COUNT> menuClickPath;
+        std::array<XrPath, Side::COUNT> bClickPath;
         CHECK_XRCMD(xrStringToPath(m_instance, "/user/hand/left/input/select/click", &selectPath[Side::LEFT]));
         CHECK_XRCMD(xrStringToPath(m_instance, "/user/hand/right/input/select/click", &selectPath[Side::RIGHT]));
         CHECK_XRCMD(xrStringToPath(m_instance, "/user/hand/left/input/squeeze/value", &squeezeValuePath[Side::LEFT]));
@@ -425,6 +426,8 @@ struct OpenXrProgram : IOpenXrProgram {
         CHECK_XRCMD(xrStringToPath(m_instance, "/user/hand/right/output/haptic", &hapticPath[Side::RIGHT]));
         CHECK_XRCMD(xrStringToPath(m_instance, "/user/hand/left/input/menu/click", &menuClickPath[Side::LEFT]));
         CHECK_XRCMD(xrStringToPath(m_instance, "/user/hand/right/input/menu/click", &menuClickPath[Side::RIGHT]));
+        CHECK_XRCMD(xrStringToPath(m_instance, "/user/hand/left/input/b/click", &bClickPath[Side::LEFT]));
+        CHECK_XRCMD(xrStringToPath(m_instance, "/user/hand/right/input/b/click", &bClickPath[Side::RIGHT]));
         // Suggest bindings for KHR Simple.
         {
             XrPath khrSimpleInteractionProfilePath;
@@ -483,6 +486,26 @@ struct OpenXrProgram : IOpenXrProgram {
             CHECK_XRCMD(xrSuggestInteractionProfileBindings(m_instance, &suggestedBindings));
         }
 
+        // Suggest bindings for the Valve Index Controller.
+        {
+            XrPath indexControllerInteractionProfilePath;
+            CHECK_XRCMD(
+                xrStringToPath(m_instance, "/interaction_profiles/valve/index_controller", &indexControllerInteractionProfilePath));
+            std::vector<XrActionSuggestedBinding> bindings{{{m_input.grabAction, squeezeValuePath[Side::LEFT]},
+                                                            {m_input.grabAction, squeezeValuePath[Side::RIGHT]},
+                                                            {m_input.poseAction, posePath[Side::LEFT]},
+                                                            {m_input.poseAction, posePath[Side::RIGHT]},
+                                                            {m_input.quitAction, bClickPath[Side::LEFT]},
+                                                            {m_input.quitAction, bClickPath[Side::RIGHT]},
+                                                            {m_input.vibrateAction, hapticPath[Side::LEFT]},
+                                                            {m_input.vibrateAction, hapticPath[Side::RIGHT]}}};
+            XrInteractionProfileSuggestedBinding suggestedBindings{XR_TYPE_INTERACTION_PROFILE_SUGGESTED_BINDING};
+            suggestedBindings.interactionProfile = indexControllerInteractionProfilePath;
+            suggestedBindings.suggestedBindings = bindings.data();
+            suggestedBindings.countSuggestedBindings = (uint32_t)bindings.size();
+            CHECK_XRCMD(xrSuggestInteractionProfileBindings(m_instance, &suggestedBindings));
+        }
+
         // Suggest bindings for the Microsoft Mixed Reality Motion Controller.
         {
             XrPath microsoftMixedRealityInteractionProfilePath;