Since the M_PI and M_PI_2 constants are lacking with MSVC (Microsoft
Visual C++) unless you define an extension define (see code below) and
one of the sources in CVS requires the M_PI_2 constant which wasn't in
there, here's a fix for that.
diff included below.
Ger
--- \\Debbie\ger\prj\1original\OpenEXR\src\IlmBase\Imath\ImathPlatform.h
2006-12-09
00:23:08.000000000 +-0200
+++ \\Debbie\ger\prj\3actual\OpenEXR\IlmBase\Imath\ImathPlatform.h
2008-06-17
22:15:23.000000000 +-0200
@@ -43,19 +43,97 @@
//
// This file contains functions and constants which aren't
// provided by the system libraries, compilers, or includes on
// certain platforms.
//----------------------------------------------------------------------------
+#if defined(_MSC_VER)
+/* [i_a] MSVC again: see the comment from Microsoft's math.h below (MSVC2005).
+
+ Other compilers may also lack M_PI / M_PI_2 which both are used in the
+ OpenEXR (test) code.
+
+ Microsoft says:
+
+ Define _USE_MATH_DEFINES before including math.h to expose these macro
+ definitions for common math constants. These are placed under an #ifdef
+ since these commonly-defined names are not part of the C/C++ standards.
+
+ End of quote.
+
+ The other defines have been added for completeness sake (they exist on
+ BSD and Linux at least and other code may expect these).
+
+ Microsoft doesn't define M_2PI ever, other compilers may lack some of these
+ too, hence the sequence as it is: load math.h, then see what's
lacking still.
+*/
+#define _USE_MATH_DEFINES 1
+#endif
+
#include <math.h>
-#if defined _WIN32 || defined _WIN64
+// #if defined _WIN32 || defined _WIN64 -- [i_a] some other platforms
(MingW?) don't have this either, it seems.
#ifndef M_PI
- #define M_PI 3.14159265358979323846
+ #define M_PI 3.14159265358979323846 /* pi */
#endif
+
+ #ifndef M_PI_2
+ #define M_PI_2 1.57079632679489661923 /* pi/2 */
+ #endif
+
+/* Some extra useful constants. */
+
+#ifndef M_E
+#define M_E 2.7182818284590452354 /* e */
#endif
+
+#ifndef M_LOG2E
+#define M_LOG2E 1.4426950408889634074 /* log_2 e */
+#endif
+
+#ifndef M_LOG10E
+#define M_LOG10E 0.43429448190325182765 /* log_10 e */
+#endif
+
+#ifndef M_LN2
+#define M_LN2 0.69314718055994530942 /* log_e 2 */
+#endif
+
+#ifndef M_LN10
+#define M_LN10 2.30258509299404568402 /* log_e 10 */
+#endif
+
+#ifndef M_PI_4
+#define M_PI_4 0.78539816339744830962 /* pi/4 */
+#endif
+
+#ifndef M_1_PI
+#define M_1_PI 0.31830988618379067154 /* 1/pi */
+#endif
+
+#ifndef M_2_PI
+#define M_2_PI 0.63661977236758134308 /* 2/pi */
+#endif
+
+#ifndef M_2_SQRTPI
+#define M_2_SQRTPI 1.12837916709551257390 /* 2/sqrt(pi) */
+#endif
+
+#ifndef M_SQRT2
+#define M_SQRT2 1.41421356237309504880 /* sqrt(2) */
+#endif
+
+#ifndef M_SQRT1_2
+#define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */
+#endif
+
+#ifndef M_2PI
+#define M_2PI 6.283185307179586232 /* 2*pi */
+#endif
+
+// #endif
//-----------------------------------------------------------------------------
//
// Fixes for the "restrict" keyword. These #ifdef's for detecting
// compiler versions courtesy of Boost's select_compiler_config.hpp;
// here is the copyright notice for that file:
--
Met vriendelijke groeten / Best regards,
Ger Hobbelt
--------------------------------------------------
web: http://www.hobbelt.com/
http://www.hebbut.net/
mail: [EMAIL PROTECTED]
mobile: +31-6-11 120 978
--------------------------------------------------
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