# Coding game: catching coins and avoiding bombs

**URL:** <https://discourse.processing.org/t/coding-game-catching-coins-and-avoiding-bombs/30709>\
**Category:** Coding Questions\
**Tags:** homework\
**Created:** [June 14, 2021, 6:25pm UTC](https://discourse.processing.org/t/coding-game-catching-coins-and-avoiding-bombs/30709 "2021-06-14T18:25:43Z")\
**Posts on this page:** 10\
**Page:** 1

<div class="post-metadata">

**Author:** ![processinggg](https://avatars.discourse-cdn.com/v4/letter/p/d2c977/32.png) [@processinggg](https://discourse.processing.org/u/processinggg)\
**Post date:** [June 14, 2021, 6:25pm UTC](https://discourse.processing.org/t/coding-game-catching-coins-and-avoiding-bombs/30709/1 "2021-06-14T18:25:43Z")

</div>

Hello, I have a few questions about following code. I have coins, which are being caught by the ship and b0mbs which have to be avoided. However, the b0mbs are somehow stuck with the coins and they aren’t their own objects. The score should start at 0 and every time you catch coins, it should goes up and when a b0mb does hit the ship, the high score and life/health should go down, but it doesn’t work because I don’t know how to code the health and the high score is faulty. I could really use the help. Thanks in advance!

\<

//main  
int score; //Score Variable  
float x = 100;  
float y = 500;  
int gefangCoins = 0;

PImage image;

Balken balken; //One ship object  
Timer timer;  
Ball ball; //An array of ball objects

void setup() {  
size(1280, 720);  
smooth();  
frameRate(30);  
textSize(15);

image = loadImage(“PirateIsland.jpg”);

balken = new Balken(20);  
ball = new Ball[100]; //Create 1000 spots in the array  
timer = new Timer(300);  
timer.start();  
}

void draw() {  
image(image,width,height);  
background(image);

// Display the catcher  
balken.display(); //Balken/ship display

// Check the timer  
if (timer.isFinished()) {  
// Deal with coins  
ball[gefangCoins] = new Ball(); // Initialize one coin  
gefangCoins++; // Increment totalCoins

```
// If we hit the end of the array
if (gefangCoins >= ball.length) {
  gefangCoins = 0; // Start over
  score = 0;
}
timer.start();

```

}

// Move and display all drops  
for (int i = 0; i \< gefangCoins; i++ ) {  
ball[i].move();  
ball[i].display();  
if (balken.intersect(ball[i])) {  
ball[i].caught();  
score++;  
}  
}  
textSize(15);  
text("Score = "+score, 10, 20);  
}

//class Ship/Balken

class Balken {

float xSpeed = 0; //Speed in direction X  
float ySpeed = 0; //Speed in direction Y

float r; //Radius  
float b, h; //Width and height  
color col; // color  
float x, y; // location

PImage image;

Balken(float tempR) {

```
image = loadImage("ship.png");

b = 150;
h = 150;
r = tempR;
col = color(50, 129, 129);
fill(col);
x = 100;
y = 520;

```

}

void setLocation(float x1, float y1) { //float tempX/Y  
x = x1; //tempX  
y = y1; //temp Y  
}

void move() {  
x -= xSpeed; //Increment x  
y += ySpeed; //Increment y

```
// Check horizontal edges
/* if (x > width || x < 0) {
 xSpeed *= - 1;
 }
 
 // Check vertical edges
 if (y > height || y < 0) {
 ySpeed *= - 1;
 }*/

```

}

void display() {  
stroke(9);  
fill(col);

```
if ((keyPressed == true) && (key == CODED)) {
  if (keyCode == LEFT) {
    x-=10;
  } else if (keyCode == RIGHT) {
    x+=10;
  }
}
  image(image, x, y, b, h);
 
}

```

// A function that returns true or false based on  
// if the catcher intersects a raindrop  
boolean intersect(Ball d) {  
// Calculate distance  
float distance = dist(x, y, d.x, d.y);  
if((d.x \> x && d.x \< x+b) && (dist(d.y, 0, y, 0) \< 54 || d.y\>=y-22))  
{  
return true;  
} else return false;

```
// Compare distance to sum of radii
/*if (distance < r + d.r) { 
  return true;
} else {
  return false;
}*/

```

}  
}

//class ball/coins

class Ball {

float x; //X-Koordinate  
float y; //Y-Koordinate  
float r; // Radius 10

int yDir = 1; //In which direction does it go?  
float y\_speed = random(1, 7);

int score = 0; //Score Variable  
int leben = 5; //Health variable  
boolean lost = false; //shows if you won or not

color c; // Define color ‘c’

PImage image;  
PImage bombe;

Ball() {  
image = loadImage(“coin.png”);  
bombe = loadImage(“Bombe.png”);  
image.resize(50,0);  
bombe.resize(50,0);  
r = 10; // All coins are the same size  
x = random(width); // Start with a random x location  
y = -r\*4; // Start a little above the window  
y\_speed = random(1, 3); // Pick a random speed  
c = color(255, 129, 129); //Color  
}

// Move the Ball down  
void move() {  
// Increment by speed  
y+=y\_speed;  
}

//Check if it hits the bottom  
boolean Bodenerreicht() {  
//If we go beyond the bottom  
if (y \> height) {  
return true;  
} else {  
return false;  
}  
}

void display() { //Display the ball  
fill(c);  
noStroke();  
//for(int i = 2; i \< r; i++) {  
image(image, x, y);  
image(bombe, x, y);  
//}  
}

//If the drop is caught  
void caught() {  
y\_speed = 0; //Stop it from moving by setting speed equal to zero  
y= -1000; //Set the location to somewhere way off-screen  
}  
}

//timer class

class Timer {

int savedTime; // When Timer started  
int totalTime; // How long Timer should last

Timer(int tempTotalTime) {  
totalTime = tempTotalTime;  
}

// Starting the timer  
void start() {  
// When the timer starts it stores the current time in milliseconds.  
savedTime = millis();  
}

// The function isFinished() returns true if 5,000 ms have passed.  
// The work of the timer is farmed out to this method.  
boolean isFinished() {  
// Check how much time has passed  
int passedTime = millis()- savedTime;  
if (passedTime \> totalTime) {  
return true;  
} else {  
return false;  
}  
}  
}

>

---

<div class="post-metadata">

**Author:** ![Chrisir](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/chrisir/32/45_2.png) [@Chrisir](https://discourse.processing.org/u/Chrisir)\
**Post date:** [June 14, 2021, 7:49pm UTC](https://discourse.processing.org/t/coding-game-catching-coins-and-avoiding-bombs/30709/2 "2021-06-14T19:49:32Z")

</div>

image(image, width, height);

this won’t work. background(image); is better.

- wrong: image(image, width, height);
- it would be image(image, 0, 0); OR
- image(image, 0,0, width, height); // which is not good style (img, pos and size as parameters)

**Your question**

> [@processinggg](#):
>
> the b0mbs are somehow stuck with the coins and they aren’t their own objects

Look here:

> [@processinggg](#):
>
> Ball() {  
> image = loadImage(“coin.png”);  
> bombe = loadImage(“Bombe.png”);

I don’t have your images and can’t run your code but I see here that you have coins and bombs in the same class Ball. **That’s the problem!**

- The image for the bomb is called bombe (good name here) the image for the coin is named image (bad name, doesn’t tell its purpose).

**Remark**

In the function display() in the class Ball you display both images!!!

```auto
    image(image, x, y);
    image(bombe, x, y);

```

That won’t work.

It’s okay that you handle both types in ONE class but you need to distinguish between them!!!

For example make a variable `boolean isCoin=false; ` in the Ball class.

In the constr say `if (random(1) < 0.5) isCoin = true; else isCoin = false;`

then use `isCoin` :

```auto
    if(isCoin)
          image(image, x, y);
    else 
        image(bombe, x, y);

```

and use ` if(isCoin)` also when you register a **HIT** to either decrease health or increase score.

OK?

Warm regards,

Chrisir

---

<div class="post-metadata">

**Author:** ![processinggg](https://avatars.discourse-cdn.com/v4/letter/p/d2c977/32.png) [@processinggg](https://discourse.processing.org/u/processinggg)\
**Post date:** [June 15, 2021, 7:04am UTC](https://discourse.processing.org/t/coding-game-catching-coins-and-avoiding-bombs/30709/4 "2021-06-15T07:04:17Z")

</div>

Thank you so much! The help is really appreciated and it worked too.

---

<div class="post-metadata">

**Author:** ![processinggg](https://avatars.discourse-cdn.com/v4/letter/p/d2c977/32.png) [@processinggg](https://discourse.processing.org/u/processinggg)\
**Post date:** [June 15, 2021, 7:18am UTC](https://discourse.processing.org/t/coding-game-catching-coins-and-avoiding-bombs/30709/5 "2021-06-15T07:18:09Z")

</div>

Update: the health is still not working. The score goes up now but it doesn’t matter if a coin or a bomb hits the ship, even though there should be a difference. It should only go up with the coins and the health doesn’t work at all. I don’t understand what you meant by use if(isCoin) how exactly should I use it in this context?

---

<div class="post-metadata">

**Author:** ![Chrisir](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/chrisir/32/45_2.png) [@Chrisir](https://discourse.processing.org/u/Chrisir)\
**Post date:** [June 15, 2021, 7:32am UTC](https://discourse.processing.org/t/coding-game-catching-coins-and-avoiding-bombs/30709/6 "2021-06-15T07:32:10Z")

</div>

Does it show different images now?

Then you used isCoin already to distinguish between them.

Now use `if (isCoin)....` to either change score or health  
upon a collision

---

<div class="post-metadata">

**Author:** ![processinggg](https://avatars.discourse-cdn.com/v4/letter/p/d2c977/32.png) [@processinggg](https://discourse.processing.org/u/processinggg)\
**Post date:** [June 15, 2021, 7:35am UTC](https://discourse.processing.org/t/coding-game-catching-coins-and-avoiding-bombs/30709/7 "2021-06-15T07:35:30Z")

</div>

It does, but I don’t know where I should use the second isCoin and how exactly I should write it for the health and score

---

<div class="post-metadata">

**Author:** ![Chrisir](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/chrisir/32/45_2.png) [@Chrisir](https://discourse.processing.org/u/Chrisir)\
**Post date:** [June 15, 2021, 10:14am UTC](https://discourse.processing.org/t/coding-game-catching-coins-and-avoiding-bombs/30709/8 "2021-06-15T10:14:39Z")

</div>

Do you have the collision check?

There you have to have the distinction with isCoin between

- increasing score OR
- decreasing health

_Please note that it is policy of this forum not to do homework. That’s why I don’t do the full Sketch…_

---

<div class="post-metadata">

**Author:** ![Chrisir](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/chrisir/32/45_2.png) [@Chrisir](https://discourse.processing.org/u/Chrisir)\
**Post date:** [June 15, 2021, 11:16am UTC](https://discourse.processing.org/t/coding-game-catching-coins-and-avoiding-bombs/30709/9 "2021-06-15T11:16:31Z")

</div>

> [@processinggg](#):
>
> The score goes up now but it doesn’t matter if a coin or a bomb hits the ship, even though there should be a difference.

As I tried to explain, when something hits the ship (an item from class Ball I suppose) distinguish whether it was a bomb or a coin:

```auto
if(isCoin) 
   score++; 
     else 
  health--;

```

**Show your entire code so we can take a look.**

---

<div class="post-metadata">

**Author:** ![processinggg](https://avatars.discourse-cdn.com/v4/letter/p/d2c977/32.png) [@processinggg](https://discourse.processing.org/u/processinggg)\
**Post date:** [June 15, 2021, 6:29pm UTC](https://discourse.processing.org/t/coding-game-catching-coins-and-avoiding-bombs/30709/10 "2021-06-15T18:29:12Z")

</div>

Okay, so the lives do go down now but the game doesn’t stop when the lives hit 0

//main

int score; //Ergebnisanzeige Variable  
int lives = 5;  
float x = 100;  
float y = 500;  
int gefangCoins = 0;

PImage image;

Balken balken; //One Balken object  
Timer timer;  
Ball[] ball; //An array of ball objects

void setup() {  
size(1280, 720);  
smooth();  
frameRate(30);  
textSize(15);

image = loadImage(“PirateIsland.jpg”);

balken = new Balken(20);  
ball = new Ball[100]; //Create 1000 spots in the array  
timer = new Timer(300);  
timer.start();  
}

void draw() {  
image(image,width,height);  
//image(image, 0, 0);  
background(image);

// Display the catcher  
balken.display(); //Balken anzeige

// Check the timer  
if (timer.isFinished()) {  
// Deal with coins  
ball[gefangCoins] = new Ball(); // Initialize one coin  
gefangCoins++; // Increment totalCoins

```
// If we hit the end of the array
if (gefangCoins >= ball.length) {
  gefangCoins = 0; // Start over
  score = 0;
 
}
timer.start();

```

}

// Move and display all drops  
for (int i = 0; i \< gefangCoins; i++ ) {  
ball[i].move();  
ball[i].display();  
if (balken.intersect(ball[i])) {  
ball[i].caught();  
// score++;  
}  
}  
textSize(15);  
text("Score = "+score, 10, 20);  
text("Lives = "+lives, 10, 40);

}

//class bar/ship

class Balken {

float xSpeed = 0; //Speed in direction X  
float ySpeed = 0; //Speed in direction Y

float r; //Radius  
float b, h; //Width and Height  
color col; // color  
float x, y; // location

PImage image;

Balken(float tempR) {

```
image = loadImage("ship.png");

b = 150;
h = 150;
r = tempR;
col = color(50, 129, 129);
fill(col);
x = 100;
y = 520;

```

}

void setLocation(float x1, float y1) { //float tempX/Y  
x = x1; //tempX  
y = y1; //temp Y  
}

void move() {  
x -= xSpeed; //Increment x  
y += ySpeed; //Increment y

}

void display() {  
stroke(9);  
fill(col);

```
if ((keyPressed == true) && (key == CODED)) {
  if (keyCode == LEFT) {
    x-=10;
  } else if (keyCode == RIGHT) {
    x+=10;
  }
}
  image(image, x, y, b, h);
 
}

```

// A function that returns true or false based on  
// if the catcher intersects a raindrop  
boolean intersect(Ball d) {  
// Calculate distance  
float distance = dist(x, y, d.x, d.y);  
if((d.x \> x && d.x \< x+b) && (dist(d.y, 0, y, 0) \< 54 || d.y\>=y-22))  
{  
return true;  
} else return false;

}  
}

//class ball

class Ball {

float x; //X-Koordinate  
float y; //Y-Koordinate  
float r; // Radius 10

int yDir = 1; //In Welche Richtung geht es?  
float y\_speed = random(1, 7);

int score = 0; //Ergebnisanzeige Variable  
int leben = 5; //Lebensanzeige variable  
boolean lost = false; //Anzeige ob man verloren hat oder nicht

color c; // Define color ‘c’

PImage muenze;  
PImage bombe;

boolean isCoin ;

Ball() {  
muenze = loadImage(“coin.png”);  
bombe = loadImage(“Bombe.png”);  
muenze.resize(50, 0);  
bombe.resize(50, 0);  
r = 10; // All coins are the same size  
if (random(1) \< 0.5)  
{  
isCoin = true;  
} else {  
isCoin = false;  
}

```
x = random(width); // Start with a random x location
y = -r*4; // Start a little above the window
y_speed = random(1, 3); // Pick a random speed
c = color(255, 129, 129); //Color

```

}

// Move the Ball down  
void move() {  
// Increment by speed  
y+=y\_speed;  
}

//Check if it hits the bottom  
boolean Bodenerreicht() {  
//If we go beyond the bottom  
if (y \> height) {  
return true;  
} else {  
return false;  
}  
}

void display() { //Display the ball  
fill(c);  
noStroke();  
// image(muenze, x, y);  
// image(bombe, x, y);

```
 if(isCoin)
      image(muenze, x, y);
else 
    image(bombe, x, y);

```

}

//If the drop is caught  
void caught() {  
y\_speed = 0; //Stop it from moving by setting speed equal to zero  
y= -1000; //Set the location to somewhere way off-screen

```
if(isCoin) 

```

score++;

```
 else 

```

lives–;

}

}

//class timer

class Timer {

int savedTime; // When Timer started  
int totalTime; // How long Timer should last

Timer(int tempTotalTime) {  
totalTime = tempTotalTime;  
}

// Starting the timer  
void start() {  
// When the timer starts it stores the current time in milliseconds.  
savedTime = millis();  
}

// The function isFinished() returns true if 5,000 ms have passed.  
// The work of the timer is farmed out to this method.  
boolean isFinished() {  
// Check how much time has passed  
int passedTime = millis()- savedTime;  
if (passedTime \> totalTime) {  
return true;  
} else {  
return false;  
}  
}  
}

---

<div class="post-metadata">

**Author:** ![Chrisir](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/chrisir/32/45_2.png) [@Chrisir](https://discourse.processing.org/u/Chrisir)\
**Post date:** [June 15, 2021, 6:50pm UTC](https://discourse.processing.org/t/coding-game-catching-coins-and-avoiding-bombs/30709/11 "2021-06-15T18:50:40Z")

</div>

> [@processinggg](#):
>
> the game doesn’t stop when the lives hit 0

I see. Did you implement that the games stops when the lives hit 0?

In which line or function is it?

processing won’t do this automatically, you know.