static double HEXA_EPS = 1.0e-3; //1E-3;
-static double HEXA_QUAD_WAY = PI/4.; //3.*PI/8.;
+static double HEXA_QUAD_WAY = M_PI/4.; //3.*PI/8.;
// ============================================================ string2shape
TopoDS_Shape string2shape( const string& brep )