clean up main() processing a bit in preparation for metadata loading

src/main.cpp

@@ -47,8 +47,10 @@ int main(int argc, char **argv)
 		}
 	}
 
+	// find file extension part of the string in the input filename
+	// we will use this to make an appropriate output mesh filename *and*
+	// to make an XML metadata filename
 	std::string extension;
-
 	try
 	{
 		extension = file.substr(file.find_last_of('.'), std::string::npos);
@@ -60,20 +62,39 @@ int main(int argc, char **argv)
 		extension = "";
 	}
 	
-	std::string meshFile = "";
+	// make sure the ms3d file didn't have some other extension for some reason
-	if (extension.length() > 0)
+	// which might conflict with our automatic mesh and metadata filename
+	// creation ...
+	if (extension == ".mesh" || extension == ".xml")
 	{
-		meshFile = file;
+		printf("Bad input filename extension.\n\n");
-		meshFile.erase(meshFile.find_last_of('.'), std::string::npos);
+		return 1;
-		meshFile.append(".mesh");
 	}
 
+	// create mesh filename based on ms3d filename
+	std::string meshFile = file;
+	if (extension.length() > 0)
+		meshFile.erase(meshFile.find_last_of('.'), std::string::npos);
+	meshFile.append(".mesh");
+	
+	std::string metadataFile = file;
+	if (extension.length() > 0)
+		metadataFile.erase(metadataFile.find_last_of('.'), std::string::npos);
+	metadataFile.append((".xml"));
+
+	// load the MS3D ...
 	Ms3d *ms3d = new Ms3d();
 	if (!ms3d->Load(file))
 	{
 		printf("Error loading MS3D file.\n\n");
 		return 1;
 	}
+	
+	// attempt to load a metadata file
+	// TODO: write this
+	
+	// convert to a mesh file
+	// TODO: pass in loaded metadata object
 	if (!ConvertToMeshFile(meshFile, ms3d, scaleFactor))
 	{
 		printf("Error converting MS3D to MESH.\n\n");