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diff --git a/gui/libs/ofxAChaosLib/src/AChaosCollatz.h b/gui/libs/ofxAChaosLib/src/AChaosCollatz.h
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+/*
+ 32/64 bits A-Chaos Lib in openFrameworks
+ (c) s373.net/x 2004, 2012, 2015
+ http://s373.net/code/A-Chaos-Lib/A-Chaos.html
+ programmed by Andre Sier, revised 2015
+ License: MIT
+*/
+
+#pragma once
+#include "AChaosBase.h"
+
+class AChaosCollatz : public AChaosBase {
+public:
+
+ long value, offset;
+ bool mode;
+
+
+ AChaosCollatz(){}
+ ~AChaosCollatz(){}
+
+ vector<string> param_labels={"","offset"};
+
+ virtual void setup(REAL * params = NULL){
+ AChaosBase::init(params, 3, 1);
+
+ if(params==NULL){
+ //init
+ value = offset = 0;
+ mode = 0;
+
+ REAL p[3] = {(REAL)value,(REAL)offset,(REAL)mode};
+ set(p);
+ } else { set(params); }
+ }
+
+ void reset(){
+ value = (long) iv[0];
+ offset = (long) iv[1];
+ mode = iv[2]>0;
+ }
+
+ void calc(){
+
+ short int stub = value % 2; //par ou impar
+
+ if(!mode) { // L.Collatz collatz mode
+ if (!stub) value /= 2; //par ]e metade
+ else value = 3*value+1; //impar ]e 3n+1
+ }
+ else if (mode) { // Terras collatz mode
+ if (!stub) value /= 2; //par ]e metade
+ else value = 0.5*(3*value+1); //impar ]e 1/2(3n+1)
+ }
+
+ ov[0] = (REAL)value;
+ }
+}; \ No newline at end of file