-#ifndef M_PI
-#define M_PI 3.14159265358979323846
-#endif
-
-const double mm2inches = 0.0393700787402;
-const double inches2mm = 25.4;
-const double mm2twips = 56.6929133859;
-const double twips2mm = 0.0176388888889;
-const double mm2pt = 2.83464566929;
-const double pt2mm = 0.352777777778;