add audioplotter source

2 files changed, 139 insertions, 0 deletions

diff --git a/gui/src/AudioPlotter.cpp b/gui/src/AudioPlotter.cpp
new file mode 100644
index 0000000..dba6765
--- /dev/null
+++ b/gui/src/AudioPlotter.cpp
@@ -0,0 +1,86 @@
+#include "Audioplotter.h"
+
+colourPolyline Audioplotter::compute_chaos(colourPolyline& poly,float colourFade){
+    colourPolyline tempPoly;
+    for (int i=0;i<poly.size();i++){
+            REAL iv[6]={poly[i].x,poly[i].y,chaos_a,chaos_b,chaos_k,chaos_p};
+            //ofLog() << i<<": calculating chaos with: "<<poly[i].x<<" "<<poly[i].y<<" "<<attractor.a<<" "<<attractor.b<<" "<<attractor.k<<" "<<attractor.p;
+            attractor.set(iv);
+            attractor.calc();
+            //ofLog() << i<<": got points: "<<attractor.nx<<" "<<attractor.ny;
+            tempPoly.addVertex(ofPoint(attractor.nx,attractor.ny),poly.getColourAt(i)*colourFade);
+    }
+    return tempPoly;
+}
+vector <colourPolyline> Audioplotter::output(float scale,float decay){
+
+        ofMatrix4x4 x = ofMatrix4x4::newIdentityMatrix();
+        x.translate((-ofGetWidth()/2)+((ofVec2f)translate).x,(-ofGetHeight()/2)+((ofVec2f)translate).y,0);
+        x.rotate(rotate,0,0,1);
+        //x.scale(((ofVec2f)scale).x,((ofVec2f)scale).y,1.0f);
+        x.translate((ofGetWidth()/2),(ofGetHeight()/2),0);
+    //destructive or non?
+            float fadefactor=decay<0.0f?1.0f-(1.0f/history_size):decay;
+
+            vector <colourPolyline> outdata;
+
+            for (int i=0;i<data.size();i++){
+                    vector <colourPolyline> newdata;
+                    for (int j=0;j<data[i].size();j++){
+                            colourPolyline line=lineTransformer::polyLineTransform(x,data[i][j]); //,fadefactor);
+                            line.setColour((line.getColourAt(0)*fadefactor)+(((ofColor)endColour)*(1.0f-fadefactor)));
+                            
+                            if (usechaos) {
+                                    colourPolyline chaosline=compute_chaos(line); //,fadefactor);
+                                    line.mix(chaosline,chaosamount);
+                            }
+
+                            
+                            //ofLog() << "set colour to "<<col;
+                            newdata.push_back(line);
+                            outdata.push_back(line);
+                    }
+                    data[i]=newdata;
+            }
+            return outdata;
+}
+void Audioplotter::addpoints(vector <float> &audio){
+    int num=min((int)num_points,(int)audio.size());
+    float step=((float)audio.size())/(num+1);
+    vector <colourPolyline> newdata;
+    if (joined){
+            colourPolyline line;
+            if (bars){
+                    for (int i=0;i<num-1;i++){
+                            line.addVertex(((step*(i+1))*ofGetWidth())/audio.size(),(0.5f+audio[step*(i+1)])*ofGetHeight(),startColour);
+                            line.addVertex(((step*(i+2))*ofGetWidth())/audio.size(),(0.5f+audio[step*(i+1)])*ofGetHeight(),startColour);
+                            line.addVertex(((step*(i+2))*ofGetWidth())/audio.size(),(0.5f+audio[step*(i+2)])*ofGetHeight(),startColour);
+                    } 
+            }
+            else {
+                    for (int i=0;i<num;i++){
+                            line.addVertex(((step*(i+1))*ofGetWidth())/audio.size(),(0.5f+audio[step*(i+1)])*ofGetHeight(),startColour);
+                    }   
+            }       
+            newdata.push_back(line);
+    }
+    else{
+            for (int i=0;i<num;i++){
+                    colourPolyline line;
+                    line.addVertex(((step*(i+1))*ofGetWidth())/audio.size(),(0.5f+audio[step*(i+1)])*ofGetHeight(),startColour);
+                    line.addVertex(((step*(i+1))*ofGetWidth())/audio.size()+width,(0.5f+audio[step*(i+1)])*ofGetHeight(),startColour);
+                    newdata.push_back(line);
+            }
+    }
+    data.insert(data.begin(),newdata);
+    while (data.size()>history_size) {
+        data.pop_back();
+    }
+}
+int Audioplotter::numpoints(){
+    int num=0;
+    for (auto d=data.begin();d!=data.end();d++){
+            num+=d->size();
+    }
+    return num;
+}
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diff --git a/gui/src/AudioPlotter.h b/gui/src/AudioPlotter.h
new file mode 100644
index 0000000..a1495c3
--- /dev/null
+++ b/gui/src/AudioPlotter.h
@@ -0,0 +1,53 @@
+#include "ofMain.h"
+#include "ofxAChaoslib.h"
+
+#include "lineTransformer.h"
+
+class Audioplotter{
+    //store and draw a numbr of audio samples
+    //how best to handle transforms - maybe pass in a transform to be added to 2nd and subsequent
+    //how best to handle length of history data - fixed number that can be set, or line budget?
+public:
+    Audioplotter(int _size=1,bool _joined=true,bool _bars=false,int _width=2){
+        setup(_size,_joined,_bars,_width);
+    }
+    void setup(int _size=1,bool _joined=true,bool _bars=false,int _width=2){
+        history_size=_size;
+        joined=_joined;
+        bars=_bars;
+        width=_width;
+        startColour=ofColor(255,255,255);
+        endColour=ofColor(0,0,0);
+        attractor.setup();
+    }
+    colourPolyline compute_chaos(colourPolyline& poly,float colourFade=1.0f);
+    vector <colourPolyline> output(float scale=1.0f,float decay=-1.0f);
+    void addpoints(vector <float> &audio);
+    int numpoints();
+
+    ofParameter<bool> joined;
+    ofParameter<bool> bars;
+    ofParameter<int> width;
+    ofParameter<int> history_size;
+    ofParameter<int> num_points;
+
+//feedback transformation
+    ofParameter<ofVec2f> translate;
+    ofParameter<float> rotate;
+    ofParameter<ofVec2f> scale;
+
+    ofParameter<ofColor> startColour;
+    ofParameter<ofColor> endColour;
+
+    ofParameter<bool> usechaos;
+    ofParameter<float> chaosamount;
+    ofParameter<float> chaos_a;
+    ofParameter<float> chaos_b;
+    ofParameter<float> chaos_k;
+    ofParameter<float> chaos_p;
+
+private:
+    vector < vector<colourPolyline>> data;
+    AChaosIkeda attractor;
+
+};
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