-/////////////////////////////////////////////////////////////////////////////
-// Name: math.h
-// Purpose: Declarations/definitions of common math functions
-// Author: John Labenski and others
-// Modified by:
-// Created: 02/02/03
-// RCS-ID:
-// Copyright: (c)
-// Licence: wxWindows licence
-/////////////////////////////////////////////////////////////////////////////
+/**
+* Name: math.h
+* Purpose: Declarations/definitions of common math functions
+* Author: John Labenski and others
+* Modified by:
+* Created: 02/02/03
+* RCS-ID:
+* Copyright: (c)
+* Licence: wxWindows licence
+*/
+
+/* THIS IS A C FILE, DON'T USE C++ FEATURES (IN PARTICULAR COMMENTS) IN IT */
#ifndef _WX_MATH_H_
#define _WX_MATH_H_
#define M_PI 3.1415926535897932384626433832795
#endif
-// unknown __VISAGECC__, __SYMANTECCC__
+// Scaling factors for various unit conversions
+#ifndef METRIC_CONVERSION_CONSTANT
+ #define METRIC_CONVERSION_CONSTANT 0.0393700787
+#endif
+
+#ifndef mm2inches
+ #define mm2inches (METRIC_CONVERSION_CONSTANT)
+#endif
+
+#ifndef inches2mm
+ #define inches2mm (1/(mm2inches))
+#endif
+
+#ifndef mm2twips
+ #define mm2twips (METRIC_CONVERSION_CONSTANT*1440)
+#endif
+
+#ifndef twips2mm
+ #define twips2mm (1/(mm2twips))
+#endif
+
+#ifndef mm2pt
+ #define mm2pt (METRIC_CONVERSION_CONSTANT*72)
+#endif
+
+#ifndef pt2mm
+ #define pt2mm (1/(mm2pt))
+#endif
+
+
+/* unknown __VISAGECC__, __SYMANTECCC__ */
#if defined(__VISUALC__) || defined(__BORLANDC__) || defined(__WATCOMC__)
#include <float.h>
#endif
-#endif // _WX_MATH_H_
+#endif
+ /* _WX_MATH_H_ */