X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/19edb09cd9448dc612608df48809683e292f0c06..22423eac8bcfcd3d357465e2cbeba08f1c431181:/include/wx/math.h

diff --git a/include/wx/math.h b/include/wx/math.h
index 6babb4d48b..c1d945c1e2 100644
--- a/include/wx/math.h
+++ b/include/wx/math.h
@@ -1,13 +1,15 @@
-/////////////////////////////////////////////////////////////////////////////
-// 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) John Labenski
+* 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_
@@ -24,7 +26,37 @@
     #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>
@@ -49,4 +81,4 @@
 #endif
 
 
-#endif // _WX_MATH_H_
+#endif /* _WX_MATH_H_ */