Precision fixes

src/ifcconvert/WavefrontObjSerializer.cpp

@@ -17,12 +17,13 @@
  *                                                                              *
  ********************************************************************************/
 
+#include <limits>
+#include <iomanip>
+
 #include "../ifcgeom/IfcGeomRenderStyles.h"
 
 #include "WavefrontObjSerializer.h"
 
-#include <iomanip>
-
 bool WaveFrontOBJSerializer::ready() {
 	return obj_stream.is_open() && mtl_stream.is_open();
 }
@@ -70,6 +71,8 @@ void WaveFrontOBJSerializer::write(const IfcGeom::TriangulationElement<double>*
 	obj_stream << "g " << o->unique_id() << "\n";
 	obj_stream << "s 1" << "\n";
 
+	obj_stream << std::setprecision(std::numeric_limits<double>::digits10);
+
 	const IfcGeom::Representation::Triangulation<double>& mesh = o->geometry();
 	
 	const int vcount = mesh.verts().size() / 3;

src/ifcparse/IfcWrite.cpp

@@ -19,6 +19,7 @@
 
 #include <iomanip>
 #include <locale>
+#include <limits>
 
 #include <boost/algorithm/string.hpp>
 
@@ -327,7 +328,7 @@ private:
 	std::string format_double(const double& d) {
 		std::ostringstream oss;
 		oss.imbue(std::locale::classic());
-		oss << std::setprecision(15) << d;
+		oss << std::setprecision(std::numeric_limits<double>::digits10) << d;
 		const std::string str = oss.str();
 		oss.str("");
 		std::string::size_type e = str.find('e');