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diff --git a/sc4pd/headers/plugin_interface/SC_Constants.h b/sc4pd/headers/plugin_interface/SC_Constants.h
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+++ b/sc4pd/headers/plugin_interface/SC_Constants.h
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+/*
+	SuperCollider real time audio synthesis system
+    Copyright (c) 2002 James McCartney. All rights reserved.
+	http://www.audiosynth.com
+
+    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.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#ifndef _SC_Constants_
+#define _SC_Constants_
+
+#include <math.h>
+
+#ifndef __FP__
+const double pi     = acos(-1.);
+#endif
+const double pi2    = pi * .5;
+const double pi32   = pi * 1.5;
+const double twopi  = pi * 2.;
+const double rtwopi = 1. / twopi;
+const double log001 = log(0.001);
+const double log01  = log(0.01);
+const double log1   = log(0.1);
+const double rlog2  = 1./log(2.);
+const double sqrt2  = sqrt(2.);
+const double rsqrt2 = 1. / sqrt2;
+
+// used to truncate precision
+const float truncFloat = (float)(3. * pow(2,22));
+const double truncDouble = 3. * pow(2,51);
+
+const float kBadValue = 1e20f; // used in the secant table for values very close to 1/0
+
+#endif