# Teaching

### Site Tools

spcs:summer2014:d6

This is an old revision of the document!

Afternoon Teams: (Angel, Ellie), (Clair, Emily, Mei-Ling), (Anastasia, Alix), (Float, Jeni), (Ed, Andrew), (Raymond, Will), (Zuri, Jove), (Fang, Penny)

# Topics

• How do you find the shortest path?
• Alan Turing
• Demos!!
• Coding
• getting things on github.
• More Animations
• Objects!
• Graphs
• Shortest Distance - Traveling Sales Person

Buggy Sorting Code

```// defining the array

int cheesesticks [] = {21, 33, 44, 22 ,55 ,66 ,77, 33, 22, 11, 44, 33, 22, 11, 55 ,66, 5, 2, 100, 20};

// counters
int i = -1;
int j = 0;

// storing the minimum
int min;

// setup runs once
void setup () {

size (800,800);

for (int k=0; k<20; k++)
println(cheesesticks[i]);
}

// runs foreverrrrr! (not really)

void draw () {

background(0);

// only runs after j reaches 20
if ((j == 20) && (i < 19)) {

i++;
j=i+1;
min = cheesesticks[i];
}

// runs as long as j is less than 20
if (j < 20) {

if (cheesesticks[j] < min){
min = cheesesticks[j];
int temp = cheesesticks[i];
cheesesticks[i] = cheesesticks[j];
cheesesticks[j] = temp;
}
j++;
}

// Draws the state of the cheesesticks
fill (0,0,255);

for (int l=0; l<20; l++)
{
rect(0, l*20, cheesesticks[l]*5, 10);
}

println("poop");

}```

Ball Code

```int x = 30;
int dx = 0;

int y = 20;
int dy = 0;

void setup() {
size (500,500);

}

void draw() {
//background(255,255,0);
fill(random(256),random(256),random(256));

ellipse(x,y,20,20);

if (keyPressed && key == 'd') {
dx = 1;
}
else {
dx = 0;
}

if (keyPressed && key == 's') {
dy = 1;
}
else {
dy = 0;
}

x = dx + x;
y = dy + y;

/*

// Collision Detection

if (y > 480 || y < 0) {
dy = dy * -1;
}

y = y + dy;

if (x > 480 || x < 0) {
dx = dx * -1;
}

x = x + dx;
*/

}```

# Assignments

## Part 1: Blog and Github (Review)

1. Blog: All your completed projects (you don't have to blog if you still want to work on them, but if you are done, blog what you have).
2. Blog: ALAN TURING. You must address these points:
1. Mention the new movie coming out
2. Talk about the imitation game
3. Briefly look at this paper and link it to your post
4. Put an image in your post

## Part 2: Bouncing Balls: Objects and Collision (Teams)

Review: Go back to the lecture on Bouncing Balls. Try to create your own Ball class that can bounce around the screen.

Make 4 balls bounce around the screen.

• ball 1 goes left and right
• ball 2 goes up and down
• ball 3 goes diagonal
• ball 4 goes diagonal and moves to where the player clicks the screen (mouseX, mouseY)

You must create a Ball class. Read: http://www.processing.org/tutorials/objects/

See this sample code for the Car class.

```// Example: Two Car objects
Car myCar1;
Car myCar2; // Two objects!

void setup() {
size(200,200);
// Parameters go inside the parentheses when the object is constructed.
myCar1 = new Car(color(255,0,0),0,100,2);
myCar2 = new Car(color(0,0,255),0,10,1);
}

void draw() {
background(255);
myCar1.drive();
myCar1.display();
myCar2.drive();
myCar2.display();
}

// Even though there are multiple objects, we still only need one class.
// No matter how many cookies we make, only one cookie cutter is needed.
class Car {
color c;
float xpos;
float ypos;
float xspeed;

// The Constructor is defined with arguments.
Car(color tempC, float tempXpos, float tempYpos, float tempXspeed) {
c = tempC;
xpos = tempXpos;
ypos = tempYpos;
xspeed = tempXspeed;
}

void display() {
stroke(0);
fill(c);
rectMode(CENTER);
rect(xpos,ypos,20,10);
}

void drive() {
xpos = xpos + xspeed;
if (xpos > width) {
xpos = 0;
}
}
}```

## Part 3: Processing (Teams) - Around the world for Mousey

Mousey the Mouse wants to visit each of you next month. Download a world map, NOT the one on this page. Any kind of world map will do (as long as it's a valid image file format). Find out where everyone lives in the class and help Mousey plan the shortest possible trip. You will approximate the locations based off of the map you choose. Mousey has a jetpack and starts at Stanford.

### Step 1: Background image

1. Find an image of the world
3. Find out where everyone is from in our class
4. Place an ellipse at every location
1. You may want to create a class object to handle these “vertices” or locations.

### Step 2: An object that has x and y

You may have realized that using a matrix (or 2-D array) makes it easy to represent the graph. Construct an Adjacency Matrix, where the weights of the edges are the distances between one point and every other point.

### Step 4: Shortest Path

Using some algorithm… Maybe Breadth First Search, draw a path that on the screen that highlights what's going on in the code. See example of lines above.

### Step 5: Travelling Sales Person

Find the shortest distance that Mousey can go INCLUDING his return home.

### Step 6: Animation

Now make the program animate!

## Part 4 - JS Platformer

Cookbook! You know what to do.