1 files changed, 160 insertions, 0 deletions
diff --git a/sc4pd/source/ExpRand.cpp b/sc4pd/source/ExpRand.cpp
new file mode 100644
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+++ b/sc4pd/source/ExpRand.cpp
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+/* sc4pd 
+   ExpRand, ExpRand~
+
+   Copyright (c) 2004 Tim Blechmann.
+
+   This code is derived from:
+	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.
+
+   Based on:
+     PureData by Miller Puckette and others.
+         http://www.crca.ucsd.edu/~msp/software.html
+     FLEXT by Thomas Grill
+         http://www.parasitaere-kapazitaeten.net/ext
+     SuperCollider by James McCartney
+         http://www.audiosynth.com
+     
+   Coded while listening to: Jim O'Rourke & Loren Mazzacane Connors: In Bern
+   
+*/
+
+#include "sc4pd.hpp"
+
+/* ------------------------ ExpRand~ -------------------------------*/
+
+class ExpRand_ar:
+    public sc4pd_dsp
+{
+    FLEXT_HEADER(ExpRand_ar,sc4pd_dsp);
+    
+public:
+    ExpRand_ar(int argc, t_atom *argv);
+    
+protected:
+    virtual void m_signal(int n, t_sample *const *in, t_sample *const *out);
+    virtual void m_dsp(int n, t_sample *const *in, t_sample *const *out);
+
+    void m_seed(int i)
+    {
+	rgen.init(i);
+    }
+    
+private:
+    float m_sample;
+    float lo;
+    float hi;
+    int sc_n;
+    RGen rgen;
+    FLEXT_CALLBACK_I(m_seed);
+};
+
+FLEXT_LIB_DSP_V("ExpRand~",ExpRand_ar);
+
+ExpRand_ar::ExpRand_ar(int argc, t_atom *argv)
+{
+    FLEXT_ADDMETHOD_(0,"seed",m_seed);
+
+    AtomList Args(argc,argv);
+
+    if (Args.Count() != 2)
+    {
+	post("not enough arguments");
+	return;
+    }
+    lo=sc_getfloatarg(Args,0);
+    hi=sc_getfloatarg(Args,1);
+    
+    rgen.init(timeseed());
+
+    AddOutSignal();
+}
+
+void ExpRand_ar::m_dsp(int n, t_sample *const *in, t_sample *const *out)
+{
+    float ratio = hi / lo;
+    m_sample = pow(ratio,rgen.frand()) * lo;
+}
+
+
+void ExpRand_ar::m_signal(int n, t_sample *const *in, 
+		       t_sample *const *out)
+{
+    t_sample *nout = *out;
+    
+    float sample = m_sample;
+    
+    for (int i = 0; i!= n;++i)
+    {
+	(*(nout)++) = sample;
+    }
+}
+
+
+/* ------------------------ ExpRand ---------------------------------*/
+
+class ExpRand_kr:
+    public flext_base
+{
+    FLEXT_HEADER(ExpRand_kr,flext_base);
+
+public:
+    ExpRand_kr(int argc, t_atom *argv);
+    
+protected:
+    void m_loadbang();
+
+    void m_seed(int i)
+    {
+	rgen.init(i);
+    }
+
+private:
+    float lo;
+    float hi;
+    int sc_n;
+    RGen rgen;
+    FLEXT_CALLBACK_I(m_seed);
+};
+
+FLEXT_LIB_V("ExpRand",ExpRand_kr);
+
+ExpRand_kr::ExpRand_kr(int argc, t_atom *argv)
+{
+    FLEXT_ADDMETHOD_(0,"seed",m_seed);
+
+    AtomList Args(argc,argv);
+    if (Args.Count() != 2)
+    {
+	post("not enough arguments");
+	return;
+    }
+    lo=sc_getfloatarg(Args,0);
+    hi=sc_getfloatarg(Args,1);
+    
+    rgen.init(timeseed());
+
+    AddOutFloat();
+}
+
+void ExpRand_kr::m_loadbang()
+{
+    float ratio = hi / lo;
+    ToOutFloat(0,pow(ratio,rgen.frand()) * lo);
+}