Collision Detection

Programming Questions

etan32

in Programming Questions • 4 months ago

Hey, I am currently making a game similar to frogger but in space! I need help with collision detection when the spaceship crashes into the other aliens and asteroids!

Any help would be appreciated. I know I need make array classes, will do that later when closer to finishing when I tidy it up and add comments :)

PImage space;
PImage trader;
PImage trader2;
PImage ship;
PImage ufo;
PImage ufo2;
PImage earth;
PImage uranaus;
PImage mars;
PImage venus;
PImage work;
PImage blackhole;
PImage asteroid;
PImage sun;
PImage safe;
float a;
float b;
float c;
float d;
float e;
float f;
float g;
float h;
float i;
float j;
float k;
float l;
float m;
float n;
float o;
float p;
float q;
float r;
int posx;
int posy;
boolean left, right, up, down;
boolean runOnce = true;
void setup() {
size (1249, 768);
smooth();
space = loadImage("space.png");
trader = loadImage("trader.png");
trader2 = loadImage("trader2.png");
ufo = loadImage("ufo.png");
ufo2 = loadImage("ufo2.png");
earth = loadImage("earth.png");
uranaus = loadImage("uranaus.png");
venus = loadImage("venus.png");
work = loadImage("work.png");
blackhole = loadImage("blackhole.png");
asteroid = loadImage("astroid.png");
sun = loadImage("sun.png");
safe = loadImage("safe.png");
a = 100;
b = 200;
c = 300;
d = 400;
e = 580;
f = 670;
g = 760;
h = 1200;
i = 835;
j = 920;
k = 1000;
l = 1100;
m = 1200;
n = 110;
o = 240;
p = 380;
q = 225;
r = 625;
posx = 600;
posy = 725;
}
void draw() {
background(space);
imageMode(CENTER);
// Alien Level 1
image(ufo, a, 600);
image(ufo, b, 550);
image(ufo, c, 550);
image(ufo, d, 550);
image(ufo, e, 550);
image(ufo, g, 550);
image(ufo, h, 550);
image(ufo, i, 550);
image(ufo2, j, 450);
image(ufo2, k, 650);
image(ufo2, l, 450);
image(ufo2, m, 650);
image(ufo2, n, 450);
image(ufo2, o, 650);
image(ufo2, p, 450);
// Alien Level 2
image(ufo, a, 200);
image(ufo, b, 250);
image(ufo, c, 300);
image(ufo, d, 150);
image(asteroid, q, 200);
image(asteroid, q, 100);
image(asteroid, r, 250);
image(asteroid, r, 225);
//misc images
image(earth, 1030, 25);
image(uranaus, 630, 25);
image(venus, 230, 25);
image(blackhole, 310, 30);
image(blackhole, 940, 30);
image(sun, 100, 30);
image(sun, 1150, 30);
image(safe, 623, 380);
image(trader2, posx, posy);
//movement of aliens
a +=3;
b -=4;
c +=5;
d -=6;
e +=3;
f -=4;
g +=5;
h -=6;
i +=3;
j -=4;
l +=5;
k +=6;
m +=3;
n -=4;
o +=5;
p -=6;
q -=9;
r +=8;
if(a>width) a=0;
if(b<0) b=width;
if(c>width) c=0;
if(d<0) d=width;
if(e>width) e=0;
if(f<0) f=width;
if(g>width) g=0;
if(h<0) h=width;
if(i>width) i=0;
if(j<0) j=width;
if(k>width) k=0;
if(l<0) l=width;
if(m>width) m=0;
if(n<0) n=width;
if(o>width) o=0;
if(q<0) q=width;
if(r>width) r=0;
}
void keyPressed()
{
if (keyCode== RIGHT)
posx+=10;
if (keyCode== LEFT)
posx-=10;
if (posx<0) posx=0;
if (posx>width) posx=width;
if (keyCode== DOWN)
posy+=10;
if (keyCode== UP)
posy-=10;
if (posy<0) posy=0;
if (posy>height) posy=height;
}

Thanks :)

Replies(4)

GoToLoop

Re: Collision Detection

4 months ago

I know I need make array classes...

Even regular Arrays would do. But creating a Enemy class is the best!

Unfortunately, w/o organizing your objects,

you'd need x tailor-made collision functions for each of your x objects!

No need to say that'd be tiresome to the extreme!

So you can't post-pone that demand for when your project is almost finished!

etan32

Re: Collision Detection

4 months ago

Haha, would it be easier if I made classes first? Would it make doing collision detection easier?

Edit: Thanks for the quick reply too :)

quarks

Why reinvent the wheel - use the Sprites library. It will handle sprite movement, animation and collision detection all in an infinite game world. True it will take some time to become familiar with the library but at least the hardcore programming is done for you.

alvar.0

Re: Collision Detection

4 months ago

Quarks, is this a new library? Never heard of it. I'll take a look. Seems interesting!

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