# Week 11 Exercises

### Exercise 1

```function draw() {
background(250, 200, 152);

if (!serialActive) {
print("Press Space Bar to select Serial Port", 20, 30);
} else {
print("Connected");

// ellipse
noStroke();
fill(255, 0, 0);
ellipse(map(rVal, 0, 1023, 0, width), height / 2, 100, 50);
}
}```

Link to the sketch: Sketch Exercise 1

### Exercise 2

```function draw() {
background(250, 200, 152);

if (!serialActive) {
print("Press Space Bar to select Serial Port");
} else {
print("Connected");

brightness = Math.floor(map(rVal, 0, 1023, 0,255));
right = Math.floor(brightness);
}
}```

The only change in Arduino code I made was using analogWrite instead of digitalWrite.

Link to the sketch: Sketch Exercise 2

### Exercise 3

```function draw() {

background(250,200,152);

if (!serialActive) {
print("Press Space Bar to select Serial Port");
} else {
if (state == 1){

applyForce(wind);
applyForce(gravity);
velocity.mult(drag);
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;
}

if (position.y >= height - mass/2 - 5) {
left = 1;
} else {
left = 0;
}

wind.x = map(rVal, 0, 1023, -1, 1)
}
}
}```

For this sketch, I used the state machine to allow the Arduino to load before the ball starts to fall. Otherwise, the LEDs wouldn’t work properly.

Link to the sketch: Sketch Exercise 3

Video demonstration: VIDEO