Paper Instruments

/* OpenProcessing Tweak of *@*http://www.openprocessing.org/sketch/2363*@* */
/* !do not delete the line above, required for linking your tweak if you upload again */

import processing.serial.*;
import java.util.ArrayList;
import themidibus.*;


String val;

int maxNumberOfSensors = 12;       // Arduino has 6 analog inputs, so I chose 6

boolean fontInitialized = false;  // whether the font's been initialized
PFont myFont;                     // font for writing text to the window
int STARTED =0;

Serial myPort; 
particle[] Z = new particle[9000];
float colour = random(1);

boolean PRESSED=false;
int screenCounter=0;
PVector v1;
long counter=0;
MidiBus myMidi;
ArrayList<Note> keyboard;
boolean[] keyIsPressed;
int[] lastPressed;
final float KEYDOWN_THRESHOLD = 1000f;

void setup() {
  smooth();
  size(1800, 1000, P2D);  
  background(255);
  v1=new PVector(width/2, height/2);
  for (int i = 0; i < Z.length; i++) {
    Z[i] = new particle( random(width), random(height), 0, 0, 1 );
  }

  /* Setup all sound */
  myMidi = new MidiBus(this, -1, 0);
  myMidi.sendTimestamps(false);
  keyboard = new ArrayList<Note>();
  int channel = 0;
  int velocity = 127;
  for(int pitch = 71; pitch > 59; pitch--) {
    keyboard.add(new Note(channel, pitch, velocity));
  }

  keyIsPressed = new boolean[keyboard.size()];
  lastPressed = new int[keyboard.size()];

  frameRate(60);
  colorMode(RGB, 255);

  String portName = Serial.list()[2];
  myPort = new Serial(this, portName, 115200);
  myPort.clear();
  myPort.bufferUntil('\n');  // don't generate a serialEvent() until you get a newline (\n) byte
}

void draw() {
  filter(INVERT);
  float r;
  stroke(0);
  fill(255, 10);

  rect(0, 0, width, height);

  colorMode(HSB, 1);
  for (int i = 0; i < Z.length; i++) {
    if (PRESSED==true) {
      Z[i].gravitate (new particle(v1.x, v1.y, 0, 0, 5));
      //fill(colour, 10);
      //ellipse(v1.x, v1.y, 20, 20);
    }
    else {
      //Z[i].gravitate (new particle(width/2, height/2, 0, 0, 1));
      screenCounter++;
      if(screenCounter<5000){
        // Z[i].repel (new particle(v1.x, v1.y, 0, 0, 1));
        screenCounter=0;  
      }
      Z[i].deteriorate();
    }
    Z[i].update();
    r = float(i)/Z.length;
    stroke( colour, pow(r, 0.1), 1-r, 0.15 );
    Z[i].display();
  }
  colorMode(RGB, 255);

  //colour+=random(0.01);
  if ( colour > 1 ) { 
    colour = colour%1;
  }

  filter(INVERT);
}

void startNote(int keyIndex) {
  if(!keyIsPressed[keyIndex]) {
    Note note = keyboard.get(keyIndex);
    myMidi.sendNoteOn(note);
    keyIsPressed[keyIndex] = true;
  }
}

void delay(int time) {
  int current = millis();
  while(millis() < current + time) {
    Thread.yield();
  }
}

void endNote(int keyIndex) {
  if(keyIsPressed[keyIndex]) {
    Note note = keyboard.get(keyIndex);
    myMidi.sendNoteOff(note);
    keyIsPressed[keyIndex] = false;
  }
}

void serialEvent (Serial myPort) {
  String inString = myPort.readStringUntil('\n');  // get the ASCII string
  if (inString != null) {  // if it's not empty
    inString = trim(inString);  // trim off any whitespace
    /*
    System.out.format("Length: %d\n", length);
    double[] incomingValues = new double[length];
    for(int i = 0; i < length; i++) {
      incomingValues[i] = Double.valueOf(tmp[i]);
    }
    System.out.format("Double: %f\n", incomingValues[0]);
    */
    String[] tmp = split(inString, ",");
    float[] incomingValues = float(tmp);
    int length = incomingValues.length;
    if (length == maxNumberOfSensors+1 && length > 0) {
      for (int i = 0; i < length-1; i++) {
        counter+=incomingValues[i];
        /* Key is Pressed */      
        if (incomingValues[i] > KEYDOWN_THRESHOLD) {
          PRESSED=true;
          v1.x=width/2-(i-6)*(width/2)/8 ;
          v1.y=height/2;
          colour+=random(0.01);
          if (i==1|i==3|i==5|i==8|i==10) {
            v1.y=height/2+random(-height/2, height/2); 
          }
          startNote(i);
        }

        /* Key is not pressed */
        if (counter<1000) {
          PRESSED=false;
          endNote(i);
        }
        if (i==11) {
          counter=0;
        }

        /*if (i>6) {
          v1.x=random(width/4, width/2);
          }
          else {
          v1.x=(width/2);
          }
         */
      }
    }
  }
}