How can I add 2 asteroids every time one gets shot instead of 1 to my game?

Programming Questions

quattle20..

How can I add 2 asteroids every time one gets shot instead of 1 to my game?

in Programming Questions • 5 months ago

The game currently adds just one asteroid every time one is destroyed. How can I add 2 asteroids each time?

PFont fontA;
int sphereDiameter = 20;
boolean shoot = false;
int randx()
{
return int(random(1000));
}
int[] sphereXCoords = {randx(), randx(), randx(), randx(), randx(), randx(), randx(), randx(), randx(), randx(), randx(), randx()};
int[] sphereYCoords = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
void setup()
{
size(1000, 620);
}
void draw()
{
background(255);
fill(color(0, 255, 0));
stroke(color(0, 255, 0));
beginShape();
fill(102);
stroke(255);
strokeWeight(2);
vertex(mouseX, 530);
vertex(mouseX+10, 550);
vertex(mouseX+40,580);
vertex(mouseX+50,585);
vertex(mouseX+55, 570);
vertex(mouseX+60, 575);
vertex(mouseX+75, 590);
vertex(mouseX+5, 605);
vertex(mouseX+10, 615);
vertex(mouseX-10, 625);
vertex(mouseX-5, 605);
vertex(mouseX-75, 590);
vertex(mouseX-60, 585);
vertex(mouseX-55,570);
vertex(mouseX-50,585);
vertex(mouseX-40,580);
vertex(mouseX-10,550);
endShape(CLOSE);
fill(color(255, 0, 0));
stroke(color(255, 0, 0));
if (shoot==true)
{
sphereKiller(mouseX);
shoot = false;
}
sphereDropper();
gameEnder();
}
void mousePressed()
{
shoot = true;
}
void sphereDropper()
{
stroke(87,54,10);
fill(87,54,10);
for (int i=0; i<5; i++)
{
ellipse(sphereXCoords[i], sphereYCoords[i]++,
sphereDiameter, sphereDiameter);
}
}
void sphereKiller(int shotX)
{
boolean hit = false;
for (int i=0; i<5; i++)
{
if ((shotX >= (sphereXCoords[i]-sphereDiameter/2)) &&
(shotX <= (sphereXCoords[i]+sphereDiameter/2)))
{
hit = true;
line(mouseX, 532, mouseX, sphereYCoords[i]);
ellipse(sphereXCoords[i], sphereYCoords[i],
sphereDiameter+25, sphereDiameter+25);
sphereXCoords[i] = randx();
sphereYCoords[i] = 0;
}
}
if (hit == false)
{
line(mouseX, 532, mouseX, 0);
}
}
void gameEnder()
{
for (int i=0; i<5; i++)
{
if (sphereYCoords[i]==600)
{
fill(color(255, 0, 0));
noLoop();
}
}
}

Replies(1)

dr.mo

Re: How can I add 2 asteroids every time one gets shot instead of 1 to my game?

5 months ago

it's a very small program and already it has spagetti-esque feeling to it. i would suggest to learn what a class is. then write a class that encapsulates the functionality of an astroid. i.e the class would store the shape (vertex positions), the centre position, the velocity and also have a function so the asteroid can draw itself. then you just have a list of asteroids you draw. if one is destroyed you remove it from the list and add two new ones.

here a quick example, so you get an idea of what i mean. PLEASE NOTE: this is JUST and example, i haven't tried this code, it won't run, it's not complete and it may have mistakes in it etc

class Asterdoid

{

Point[] _shape; //the polygon

Point _position; //the position of the whole astroid

Point _velocity; //how many pixels this moves per update

Asteroid() //constructor

{

//initialsise the _shape values here

//set initial values for velocity and position

}

void Update()

{

//update position

_position.x += _velocity.x;

_position.y += _velocity.y;

//maybe rotation?

//check what happens when it moves off screen etc

}

void Draw()

{

for(int i = 0 ;i < _shape.length; i++)

{

Point pc = _shape[i];

beginShape();

vertex(pc.x + _position.x, pc.y + _position.y);

end Shape();

}

and then in your processing application you just do this:

Asterdoid[] astroids;

void setup()

{

asterdoids = new Asterdoid[10];

for(int i = 0; i < asterdoids.length; i++)

{

asterdoids[i] = new Asterdoid();

}

void draw()

{

for(int i = 0; i < asterdoids.length; i++)

{

asterdoids[i].Update();

asterdoids[i].Draw();

}

//check if an asterdoid has been destroyed (you could have a hit test part of Asterdoid class)

//do all the other stuff you need to do...

}

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