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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commit47d455dd55be855e4cc691c32f687f723d9247ee (patch)
tree52e236aaa2576bdb3840ebede26619692fed6d7d /kpovmodeler/pmmath.cpp
downloadtdegraphics-47d455dd55be855e4cc691c32f687f723d9247ee.tar.gz
tdegraphics-47d455dd55be855e4cc691c32f687f723d9247ee.zip
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdegraphics@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
Diffstat (limited to 'kpovmodeler/pmmath.cpp')
-rw-r--r--kpovmodeler/pmmath.cpp67
1 files changed, 67 insertions, 0 deletions
diff --git a/kpovmodeler/pmmath.cpp b/kpovmodeler/pmmath.cpp
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+/*
+**************************************************************************
+ description
+ --------------------
+ copyright : (C) 2000-2001 by Andreas Zehender
+ email : zehender@kde.org
+**************************************************************************
+
+**************************************************************************
+* *
+* This program is free software; you can redistribute it and/or modify *
+* it under the terms of the GNU General Public License as published by *
+* the Free Software Foundation; either version 2 of the License, or *
+* (at your option) any later version. *
+* *
+**************************************************************************/
+
+
+// some helper functions
+
+#include "pmmath.h"
+#include <math.h>
+
+bool approx( double v1, double v2, double epsilon )
+{
+ return fabs( v1 - v2 ) < epsilon;
+}
+
+bool approxZero( double v, double epsilon )
+{
+ return fabs( v ) < epsilon;
+}
+
+double rad2Deg( double rad )
+{
+ return rad / M_PI * 180.0;
+}
+
+double deg2Rad( double deg )
+{
+ return deg * M_PI / 180.0;
+}
+
+double pmatan( double s, double c )
+{
+ double a;
+ if( approxZero( c ) )
+ {
+ if( s > 0 )
+ a = M_PI_2;
+ else
+ a = -M_PI_2;
+ }
+ else
+ a = atan2( s, c );
+
+ return a;
+}
+
+int pmpot( int x, int y )
+{
+ int i;
+ int result = 1;
+ for( i = 0; i < y; i++ )
+ result *= x;
+ return result;
+}