Support relative filenames in serialization

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@3713 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CMeshSceneNode.cpp

@@ -10,6 +10,7 @@
 #include "IMeshCache.h"
 #include "IAnimatedMesh.h"
 #include "IMaterialRenderer.h"
+#include "IFileSystem.h"
 
 namespace irr
 {
@@ -313,7 +314,15 @@ void CMeshSceneNode::serializeAttributes(io::IAttributes* out, io::SAttributeRea
 {
 	IMeshSceneNode::serializeAttributes(out, options);
 
-	out->addString("Mesh", SceneManager->getMeshCache()->getMeshName(Mesh).getPath().c_str());
+	if (options && (options->Flags&io::EARWF_USE_RELATIVE_PATHS) && options->Filename)
+	{
+		const io::path path = SceneManager->getFileSystem()->getRelativeFilename(
+				SceneManager->getFileSystem()->getAbsolutePath(SceneManager->getMeshCache()->getMeshName(Mesh).getPath()),
+				options->Filename);
+		out->addString("Mesh", path.c_str());
+	}
+	else
+		out->addString("Mesh", SceneManager->getMeshCache()->getMeshName(Mesh).getPath().c_str());
 	out->addBool("ReadOnlyMaterials", ReadOnlyMaterials);
 }