From b2b4597a1b5e4b43c1d10c0e19ca17d77355fea5 Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <eighthave@users.sourceforge.net>
Date: Thu, 25 May 2006 16:47:32 +0000
Subject: appended externals/creb/system/envelope_util.c to the end to make
 building dead simple

svn path=/trunk/externals/creb/; revision=5128
---
 modules/ear~.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

(limited to 'modules/ear~.c')

diff --git a/modules/ear~.c b/modules/ear~.c
index ac70ab1..dcee56e 100644
--- a/modules/ear~.c
+++ b/modules/ear~.c
@@ -142,3 +142,36 @@ void ear_tilde_setup(void)
 
 }
 
+/*
+ *   Utility functions for exponential decay 
+ *   Copyright (c) 2000-2003 by Tom Schouten
+ *
+ *   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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+#include "extlib_util.h"
+
+float milliseconds_2_one_minus_realpole(float time)
+{
+  float r;
+
+  if (time < 0.0f) time = 0.0f;
+  r = -expm1(1000.0f * log(ENVELOPE_RANGE) / (sys_getsr() * time));
+  if (!(r < 1.0f)) r = 1.0f;
+
+  //post("%f",r);
+  return r;
+}
-- 
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