Entity parenting on parse

include/Engine/Core/EntityFile.h

@@ -69,6 +69,7 @@ public:
     {
         Unknown,
         Entity,
+        EntityRef,
         Component,
         ComponentField
     };
@@ -77,29 +78,32 @@ public:
         : m_Handler(handler)
         , m_Reader(reader)
     {
-        // 0 is imaginary world entity
-        m_EntityStack.push(0);
+        // Push first parent
+        m_EntityStack.push(EntityID_Invalid);
         m_StateStack.push(State::Unknown);
     }
 
     void startElement(const XMLCh* const _uri, const XMLCh* const _localName, const XMLCh* const _qname, const xercesc::Attributes& attrs) override
     {
         std::string name = XS::ToString(_localName);
-
-        if (m_StateStack.top() == State::Unknown || m_StateStack.top() == State::Entity) {
+        if (m_StateStack.top() == State::Unknown || m_StateStack.top() == State::Entity || m_StateStack.top() == State::EntityRef) {
             if (name == "Entity") {
+                // Handle entity references
+                const XMLCh* refAttr = attrs.getValue(XS::ToXMLCh("ref"));
+                std::string ref = XS::ToString(refAttr);
+                if (ref.empty()) {
                     m_StateStack.push(State::Entity);
                     onStartEntity(attrs);
-                return;
+                } else {
+                    m_StateStack.push(State::EntityRef);
+                    onStartEntityRef(ref, attrs);
                 }
-            if (name == "EntityRef") {
-                onStartEntityRef(attrs);
                 return;
             }
         }
 
         std::string uri = XS::ToString(_uri);
-        if (m_StateStack.top() == State::Entity) {
+        if (m_StateStack.top() == State::Entity || m_StateStack.top() == State::EntityRef) {
             if (uri == "components") {
                 m_StateStack.push(State::Component);
                 onStartComponent(name);
@@ -125,10 +129,16 @@ public:
     void endElement(const XMLCh* const _uri, const XMLCh* const _localName, const XMLCh* const _qname) override
     {
         std::string name = XS::ToString(_localName);
-        if (m_StateStack.top() == State::Entity) {
+        if (m_StateStack.top() == State::Entity || m_StateStack.top() == State::EntityRef) {
             if (name == "Entity") {
+                if (m_StateStack.top() == State::Entity) {
                     m_StateStack.pop();
+                    if (m_StateStack.top() == State::EntityRef) {
+                        onEndEntityRef();
+                    } else {
                         onEndEntity();
+                    }
+                }
                 return;
             }
         }
@@ -188,16 +198,16 @@ private:
     {
         m_EntityStack.pop();
     }
-    void onStartEntityRef(const xercesc::Attributes& attrs)
+    void onStartEntityRef(const std::string& ref, const xercesc::Attributes& attrs)
     {
-        std::string path = XS::ToString(attrs.getValue(XS::ToXMLCh("file")));
-        
         xercesc::SAX2XMLReader* parser = xercesc::XMLReaderFactory::createXMLReader();
         parser->setContentHandler(this);
         parser->setErrorHandler(this);
-        parser->parse(path.c_str());
+        parser->parse(ref.c_str());
         delete parser;
+        //m_StateStack.push(State::Entity);
     }
+    void onEndEntityRef() { }
     void onStartComponent(const std::string& name)
     {
         //LOG_DEBUG("    Component: %s", name.c_str());

include/Engine/Core/EntityFileParser.h

@@ -9,7 +9,7 @@ class EntityFileParser
 public:
     EntityFileParser(const EntityFile* entityFile);
 
-    void MergeEntities(World* world);
+    void MergeEntities(World* world, EntityID parent = EntityID_Invalid);
 
 private:
     const EntityFile* m_EntityFile;

include/Engine/Editor/EditorSystem.h

@@ -31,6 +31,7 @@ private:
     bool m_Visible;
     boost::filesystem::path m_DefaultEntityDir;
     boost::filesystem::path m_CurrentFile;
+    std::map<boost::filesystem::path, EntityID> m_CurrentFiles;
     std::vector<glm::vec2> m_PickingQueue;
 
     enum class WidgetMode

resources/Schema/Entities/EntityRefTest.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
+<Entity xmlns:c="components" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../Types/Entity.xsd">
+
+	<Components>
+	<c:Transform/>
+	</Components>
+
+	<Children>
+		<Entity ref="Schema/Entities/RaptorCopter.xml">
+			<Components>
+				<c:Transform>
+					<Position X="1" Y="2" Z="3" />
+				</c:Transform>
+			</Components>
+		</Entity>
+	</Children>
+
+</Entity>

resources/Schema/Types/Entity.xsd

@@ -24,19 +24,13 @@
 					<xs:complexType>
 						<xs:sequence>
 							<xs:element ref="Entity" minOccurs="0" maxOccurs="unbounded"/>
-							<xs:element name="EntityRef" minOccurs="0" maxOccurs="unbounded">
-								<xs:complexType>
-									<xs:all>
-										<xs:attribute name="file" type="xs:string" minOccurs="0"/>
-									</xs:all>
-								</xs:complexType>
-							</xs:element>
 						</xs:sequence>
 					</xs:complexType>
 				</xs:element>
 			</xs:all>
 			<xs:attribute ref="xml:base"/>
 			<xs:attribute name="name" type="xs:string" minOccurs="0" default=""/>
+			<xs:attribute name="ref" type="xs:string" minOccurs="0" default=""/>
 		</xs:complexType>
 	</xs:element>
 </xs:schema>

src/Engine/Core/EntityFile.cpp

@@ -20,7 +20,7 @@ void EntityFile::Parse(const EntityFileHandler* handler) const
 {
     using namespace xercesc;
 
-    EntityFileSAXHandler saxHandler(handler, nullptr);
+    EntityFileSAXHandler saxHandler(handler, m_SAX2XMLReader);
     m_SAX2XMLReader->setFeature(XMLUni::fgXercesCacheGrammarFromParse, true);
     m_SAX2XMLReader->setFeature(XMLUni::fgXercesUseCachedGrammarInParse, true);
     m_SAX2XMLReader->setContentHandler(&saxHandler);

src/Engine/Core/EntityFileParser.cpp

@@ -9,10 +9,10 @@ EntityFileParser::EntityFileParser(const EntityFile* entityFile)
     m_Handler.SetStartFieldDataCallback(std::bind(&EntityFileParser::onFieldData, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3, std::placeholders::_4));
 }
 
-void EntityFileParser::MergeEntities(World* world)
+void EntityFileParser::MergeEntities(World* world, EntityID parent /*= EntityID_Invalid*/)
 {
     m_World = world;
-    m_EntityIDMapper[0] = 0;
+    m_EntityIDMapper[EntityID_Invalid] = parent;
     m_EntityFile->Parse(&m_Handler);
 }
 

src/Engine/Input/InputProxy.cpp

@@ -62,7 +62,7 @@ void InputProxy::Process()
             e.Command = command;
             e.Value = currentValue;
             m_EventBroker->Publish(e);
-            LOG_DEBUG("Input: Published command %s=%f for player %i", e.Command.c_str(), e.Value, e.PlayerID);
+            //LOG_DEBUG("Input: Published command %s=%f for player %i", e.Command.c_str(), e.Value, e.PlayerID);
             m_LastCommandValues[command] = currentValue;
         }
     }
@@ -78,7 +78,7 @@ void InputProxy::Process()
         }
         //e.Value = std::max(-1.f, std::min(e.Value, 1.f));
         m_EventBroker->Publish(e);
-        LOG_DEBUG("Input: Published command %s=%f for player %i", e.Command.c_str(), e.Value, e.PlayerID);
+        //LOG_DEBUG("Input: Published command %s=%f for player %i", e.Command.c_str(), e.Value, e.PlayerID);
     }
     m_CommandQueue.clear();
 }