createByHeart.pde

import processing.serial.*;
import processing.video.*;
import java.awt.*;

/*------from the lecture note------*/

Serial myPort;  // Create object from Serial class

/*------from the processing libraries------*/
import gab.opencv.*; 

OpenCV opencv;
Capture capture;

/*-------Button variables--------*/
String val="n";      // button value of changing shapes
String save="q"; // value of save button

/*-------Camera function--------*/
boolean backgroundCaptured = false; // this variable show the functionality
PImage samplingImage; // this is the image that is used to check the differences with the live image

/*-------Data of pulse sensor--------*/
int Sensor;      // HOLDS PULSE SENSOR DATA FROM ARDUINO 
int IBI;         // HOLDS TIME BETWEN HEARTBEATS FROM ARDUINO
int BPM;         // HOLDS HEART RATE VALUE FROM ARDUINO
boolean beat = false; 

/*-------paint function--------*/
float j = 0; // j is the value fed into sine functions
float speedPaint = 0; // speedPaint is mapped to mouse x and added into j per frame
float z = 0; // used to oscilate ring thickness using sine(j)
float size = 196; // used to translate shapes downwards in the for loop to make ring rather than circle
float col; // makes the shapes glow white when they get to center using sin

/*-------boolean switches--------*/
boolean shape = true; // if true then use circles, otherwise rectanges
boolean play = true; // if false then pause the animation

void setup() {
  size(960, 960); 
  myPort=new Serial(this, "COM3", 115200); // set port 
  myPort.clear();
  myPort.bufferUntil('\n');  // set buffer full flag on receipt of carriage return
  colorMode(HSB, 360); // uses hue, saturation and brightness colour mode
  smooth(); // smooth dem lines
  frameRate(225);

  String[] cameras = Capture.list(); 

  samplingImage = createImage(320, 240, RGB); // create a new blank image to define its dimensions
  capture = new Capture(this, 320, 240, cameras[0]); 
  // here begins a new sessions of capturing of the images from the webcam
  capture.start();
  opencv = new OpenCV(this, 320, 240); 
  opencv.loadCascade(OpenCV.CASCADE_FRONTALFACE); // It is used for face detection
}

void captureEvent (Capture myCapture) {
  capture.read();
}

void draw() {
  background(360); // some shade of grey that works visually
  cam();// call cam function
  BPM = min(BPM, 200); 
  paint(width/2, height/2, IBI*0.2, BPM, -IBI, -BPM, 100, 100, 30, 58, 86, 75, 20, 75, 200, 320);
  if (Sensor == 0) {
    play=!play;
  }
    savef();
  }

// camera function with face detection
void cam() {
  if (capture.available()==true)
  capture.read(); 
  opencv.loadImage(capture);
  Rectangle[] faces = opencv.detect(); 

  image( capture, 0, -50); //show the live webcam image in different positions
  set(0, -50, capture);
  image( capture, 320, -50); //show the live webcam image in different positions
  set(320, -50, capture);
  // when the cam detected the face, image will build out and follow your face position
  if (faces.length>0) {
    for ( int i=0; i<faces.length; i++)
    {
      paint(faces[i].x-10+faces[i].width/2, faces[i].y+this.height/2+faces[i].height/2, IBI*0.4, BPM, -IBI, -BPM, 10, 10, 30, 58, 86, 75, 20, 75, 100, 120);
    }
  }
  image( capture, 640, -50); // show the live webcam image in different positions
  set(640, -50, capture);
  image( capture, 0, 770); // show the live webcam image in different positions
  set(0, 770, capture);
  image( capture, 320, 770); // show the live webcam image in different positions
  set(320, 770, capture);
  // when the cam detected the face, image will build out and follow your face position
  if (faces.length>0) {
    for ( int i=0; i<faces.length; i++)
    {
      paint(faces[i].x+640+faces[i].width/2, faces[i].y+this.height/2+faces[i].height/2, IBI*0.4, BPM, -IBI, -BPM, 10, 10, 30, 58, 86, 75, 20, 75, 100, 120);
    }
  }
  image( capture, 640, 770); // show the live webcam image in different positions
  set(640, 770, capture);
}

void changeShape() {
  shape = !shape;
}

/*------reference from  https://processing.org/reference/saveFrame_.html ------*/

// screen capture to png file
void savef() {
  if (save.charAt(0)!='q') {
    saveFrame("image/artwork-####.png");
  } else {
  }
}