u3d exporter first version

wrap/io_trimesh/export_u3d.h

@@ -0,0 +1,70 @@
+#ifndef __VCGLIB_EXPORTERU3D
+#define __VCGLIB_EXPORTERU3D
+
+#include <string>
+
+namespace vcg {
+namespace tri {
+namespace io {
+
+template<typename SaveMeshType>
+class ExporterU3D
+{
+private:
+
+#ifdef WIN32
+	static void CreateDir()
+	{
+		system("mkdir __tmp_dir");
+	}
+
+	static void RemoveDir()
+	{
+		system("rmdir /S /Q __tmp_dir");
+	}
+
+	static void InvokeConverter(const char* converter_path,const char* idtf_file,const char* u3d_file)
+	{
+		std::string com(converter_path);
+		system(("cd " + com).c_str());
+		com = std::string("IDTFConverter.exe -input ") + idtf_file + " -output " + u3d_file;
+		system(com.c_str());
+	}
+
+#else
+	#ifdef LINUX
+	static void CreateDir()
+	{
+		system("echo off mkdir __tmp_dir");
+	}
+
+	static void RemoveDir()
+	{
+		system("echo off rmdir -ignore-fail-on-non-empty __tmp_dir");
+	}
+
+	static void InvokeConverter(const char* converter_path,const char* idtf_file,const char* u3d_file)
+	{
+
+	}
+	#endif
+#endif
+
+public:
+	
+	static void Save(SaveMeshType& m,const char* outputfile,const int mask)
+	{
+		CreateDir();
+		std::string tmp(outputfile);
+		tmp = "tmp_dir/" + tmp + ".idtf";
+		vcg::tri::io::ExporterIDTF<SaveMeshType>::Save(m,tmp.c_str(),mask);
+		InvokeConverter("../../code/lib/U3D/Bin/Win32/Release",tmp.c_str() ,outputfile);
+		RemoveDir();
+	}
+};
+
+}
+}
+}
+
+#endif