Source code for a plotter drawing based on a @Hau_kun tweet

Hau_kun_sketch.cpp

// Original tweet by @Hau_kun
// https://twitter.com/Hau_kun/status/1397547848015638532

// Made in openFrameworks
// Using ofGCode
// https://github.com/andymasteroffish/ofxGCode

void ofApp::setup(){
    ofxGCode gcode;
    
    ofBackground(5);
    
    float noise_seed = 0;
    
    gcode.setup();
    gcode.demo_col.set(255);
    
    for(float y=0;y<780;y+=60){
        for(float x=0;x<780;x+=60){
            
            //rectangle
            vector<ofVec2f> rect;
            rect.push_back(ofVec2f(x-25,y-25));
            rect.push_back(ofVec2f(x+25,y-25));
            rect.push_back(ofVec2f(x+25,y+25));
            rect.push_back(ofVec2f(x-25,y+25));
            
            //draw it
            gcode.polygon(rect);
            
            //make some circle lines
            float noise_zoom = 0.011;
            for(int i=16; i>0; i--){
                float R=ofNoise(x*noise_zoom,y*noise_zoom, noise_seed)*18 + (int)(i/8) * PI;
                ofVec2f center;
                center.x = x+cos(R)*45;
                center.y = y+sin(R)*45;
                vector<ofVec2f> pnts = ofxGCode::get_circle_pnts(center,(i*9)/2, 70);
                vector<GLine> lines = ofxGCode::pnts_to_lines(pnts, true);
                lines = ofxGCode::trim_lines_outside(lines, rect);
                gcode.add_lines(lines);
            }
        }
      }
    
    gcode.sort();
    gcode.save("hau_kun.nc");
    
}