Week 11 – Production Exercises

Exercise 1

• Drawing an ellipse and making it move horizontally based on photoresistor

Code:

let x=0;

function setup() {
  createCanvas(400,400);
  textSize(18);
}

function draw() {
  if (serialActive){
    background("white");
    ellipse(map(x,0,1023,0,400),height/2,50,50);
  }else{
    background("white");
    console.log("not connected");
  }
}

function keyPressed() {
  if (key == " ") {
    // important to have in order to start the serial connection!!
    setUpSerial();
  }
}

function readSerial(data) {
  
  if (data != null) {
    x = int(data);
  }else{
    x = 0;
  }
}

//Arduino code
// void setup() {
//     Serial.begin(9600);
//     pinMode(A0, INPUT);
// }

// void loop() {
//   Serial.println(analogRead(A0));
// }

Exercise 2

• Increase the brightness of the LED with mouse click

Code:

let bright=0;

function setup() {
  createCanvas(400,400);
  textSize(18);
}

function draw() {
  if (serialActive){
    background("white");
    text(bright,10,10);
  }else{
    background("white");
    console.log("not connected");
  }
}

function keyPressed() {
  if (key == " ") {
    // important to have in order to start the serial connection!!
    setUpSerial();
  }
}

function mousePressed(){
  if(serialActive){
    bright+=1;
    writeSerial(bright);
  }
  
}
function readSerial(data) {
  
}

//Arduino code
// int brightness;
// void setup() {
//     Serial.begin(9600);
//     pinMode(9, OUTPUT);
// }

// void loop() {
//   brightness = Serial.parseInt();
//   analogWrite(9,brightness);
// }

Exercise 3

• Turning on LED when the ball bounces and use photoresistor to control wind movement

Circuit

Video:

Code:

let velocity;
let gravity;
let position;
let acceleration;
let wind;
let drag = 0.99;
let mass = 50;
let bounce = 0;

function setup() {
  createCanvas(640, 360);
  noFill();
  position = createVector(width/2, 0);
  velocity = createVector(0,0);
  acceleration = createVector(0,0);
  gravity = createVector(0, 0.5*mass);
  wind = createVector(0,0);
}

function draw() {
  background(255);
  if(!serialActive){
    console.log("PRESS a TO CONNECT");
  }
   else{
    applyForce(wind);
    applyForce(gravity);
    velocity.add(acceleration);
    velocity.mult(drag);
    position.add(velocity);
    acceleration.mult(0);
    ellipse(position.x,position.y,mass,mass);
    if (position.y > height-mass/2) {
        velocity.y *= -0.9;  // A little dampening when hitting the bottom
        position.y = height-mass/2;
        bounce = 1;
      }else{
        bounce = 0; 
      }
    
  }
}

function applyForce(force){
  // Newton's 2nd law: F = M * A
  // or A = F / M
  let f = p5.Vector.div(force, mass);
  acceleration.add(f);
}

function keyPressed(){
  if (keyCode==LEFT_ARROW){
    wind.x=-1;
  }
  if (keyCode==RIGHT_ARROW){
    wind.x=1;
  }
  if (key==' '){
    mass=random(15,80);
    position.y=-mass;
    velocity.mult(0);
  }
   if (key == "a") {
    // important to have in order to start the serial connection!!
    setUpSerial();
  }
}
function readSerial(data) {
  if (data != null) {
        console.log(data);
        wind.x = map(int(data), 0, 1023, -2, 2);
        writeSerial(bounce + '\n');
  }
}

//Arduino code
// int bounce;
// void setup() {
//   Serial.begin(9600);
//   pinMode(9,OUTPUT);
//   while (Serial.available() <= 0) {
//     Serial.println("0"); // send a starting message
//   }
// }

// void loop() {
//   while(Serial.available()){
    
//     bounce = Serial.parseInt();
//     if (Serial.read() == '\n') {
//       digitalWrite(9,bounce);
      
//     }
    
//   }
//   int sensor = analogRead(A1);
//   Serial.println(sensor);
//   // Serial.println(analogRead(A0));
  
// }