implement picker/getNameForEntity

ios/src/AssetManager.cpp

@@ -946,6 +946,16 @@ size_t AssetManager::getLightEntityCount(EntityId entity) const noexcept {
     return asset.mAsset->getLightEntityCount();
 }
 
+const char* AssetManager::getNameForEntity(EntityId entityId) {
+  const auto& entity = Entity::import(entityId);
+  auto nameInstance = _ncm->getInstance(entity);
+  if(!nameInstance.isValid()) {
+    Log("Failed to find name instance for entity ID %d", entityId);
+    return nullptr;
+  }
+  return _ncm->getName(nameInstance);
+}
+
 
 } // namespace polyvox
 

ios/src/FilamentViewer.cpp

@@ -113,6 +113,8 @@ static const uint16_t sFullScreenTriangleIndices[3] = {0, 1, 2};
 
 FilamentViewer::FilamentViewer(const void* sharedContext, const ResourceLoaderWrapper* const resourceLoaderWrapper, void* const platform, const char* uberArchivePath)
   : _resourceLoaderWrapper(resourceLoaderWrapper) {
+
+  ASSERT_POSTCONDITION(_resourceLoaderWrapper != nullptr, "Resource loader must be non-null");
   
   #if TARGET_OS_IPHONE
     ASSERT_POSTCONDITION(platform == nullptr, "Custom Platform not supported on iOS");
@@ -630,7 +632,7 @@ void FilamentViewer::createRenderTarget(intptr_t texture, uint32_t width, uint32
   // Make a specific viewport just for our render target
   _view->setRenderTarget(_rt);
   
-  Log("Set render target for glTextureId %u %u x %u", texture, width, height);
+  Log("Set render target for texture id %u to %u x %u", texture, width, height);
 
 }
 
@@ -1051,7 +1053,16 @@ void FilamentViewer::scrollUpdate(float x, float y, float delta) {
 }
 
 void FilamentViewer::scrollEnd() {
-  
+  // noop  
+}
+
+void FilamentViewer::pick(uint32_t x, uint32_t y, EntityId* entityId) {
+  Log("Picking at %d,%d", x, y);
+  _view->pick(x, y, [=](filament::View::PickingQueryResult const & result) {
+      
+        *entityId = Entity::smuggle(result.renderable);
+        Log("Got result %d", *entityId);
+  });
 }
 
 } // namespace polyvox

ios/src/PolyvoxFilamentApi.cpp

@@ -373,15 +373,24 @@ extern "C" {
       ((AssetManager*)assetManager)->stopAnimation(asset, index);
   }
 
-  int hide_mesh(void* assetManager, EntityId asset, const char* meshName) {
+  FLUTTER_PLUGIN_EXPORT int hide_mesh(void* assetManager, EntityId asset, const char* meshName) {
       return ((AssetManager*)assetManager)->hide(asset, meshName);
   }
 
-  int reveal_mesh(void* assetManager, EntityId asset, const char* meshName) {
+  FLUTTER_PLUGIN_EXPORT int reveal_mesh(void* assetManager, EntityId asset, const char* meshName) {
       return ((AssetManager*)assetManager)->reveal(asset, meshName);
   }
 
-  FLUTTER_PLUGIN_EXPORT void  ios_dummy() {
+  
+  FLUTTER_PLUGIN_EXPORT void pick(void* const viewer, int x, int y, EntityId* entityId) {
+    ((FilamentViewer*)viewer)->pick(static_cast<uint32_t>(x), static_cast<uint32_t>(y), static_cast<int32_t*>(entityId));
+  }
+
+  FLUTTER_PLUGIN_EXPORT const char* get_name_for_entity(void* const assetManager, const EntityId entityId) {
+    return ((AssetManager*)assetManager)->getNameForEntity(entityId);
+  }
+
+  FLUTTER_PLUGIN_EXPORT void ios_dummy() {
     Log("Dummy called");
   }
 }

ios/src/PolyvoxFilamentFFIApi.cpp

@@ -444,6 +444,16 @@ extern "C"
         fut.wait();
     }
 
+    FLUTTER_PLUGIN_EXPORT const char* get_name_for_entity_ffi(void* const assetManager, const EntityId entityId) { 
+        std::packaged_task<const char*()> lambda([&] {
+            return get_name_for_entity(assetManager, entityId);
+        });
+        auto fut = _rl->add_task(lambda);
+        fut.wait();
+        return fut.get();
+    }
+
+
     FLUTTER_PLUGIN_EXPORT void ios_dummy_ffi() {
         Log("Dummy called");
     }