Collision Detection Images

Programming Questions

etan32

in Programming Questions • 4 months ago

Hey all, I need major help with the collision detection! I need my spaceship (Trader2) to detect when it collides with the ufo's and asteroids!

//Space Jump - Created By Ethan Keating
//June 1st 2013
// Would like to thank all that helped me when I struggled with programming issues
// when creating this game!
// All the images for the game
Aliens aliens;
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;
// The floats for the images, giving them 2 or more specific jobs.
float enemyX;
float enemyY;
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 for positions of the ufo's
int posx;
int posy;
int posa;
int posb;
// Creates the setup code, loading all the images to be able to be put
// into the game
void setup() {
size (1249, 768); // The size of the game
smooth();
aliens = new Aliens(random(200, 1000), random(100, 768), random(-4, 4));
space = loadImage("space.png"); // The background
trader = loadImage("trader.png"); // Spaceship when not mving
trader2 = loadImage("trader2.png"); // Spaceship when moving
ufo = loadImage("ufo.png"); // Ufo design #1
ufo2 = loadImage("ufo2.png"); // Ufo design #2
earth = loadImage("earth.png"); // Earth
uranaus = loadImage("uranaus.png"); // Uranaus
venus = loadImage("venus.png"); // Venus
blackhole = loadImage("blackhole.png"); // Blackholes
asteroid = loadImage("astroid.png"); // Astroids in level two
sun = loadImage("sun.png"); // The sun
safe = loadImage("safe.png"); // The middle of the map, safe zone for ship
enemyX = 100;
enemyY = 600;
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;
posa = 200;
posb = 500;
}
//
void draw() {
background(space);
aliens.setup();
aliens.draw();
imageMode(CENTER);
// Alien Level 1
image(ufo, enemyX, enemyY);
image(ufo, c, 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, c, 200);
image(ufo, c, 250);
image(ufo, c, 300);
image(ufo, d, 150);
image(asteroid, q, 200);
image(asteroid, c, 100);
image(asteroid, r, 250);
image(asteroid, e, 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
enemyX +=3;
c -=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(enemyX>width) enemyX=0;
if(enemyY<0) enemyY=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;
}

Any help would be greatly appreciated!!

Replies(1)

janjacobsv

Re: Collision Detection Images

4 months ago

usually object collision works as follows:

what you do is test the coordinates of the ship and the objects:
if (shipx + widthShipX > objx +widthObjX AND
shipx + widthShipX < objx +widthObjX AND
shipy + widthShipy > objy +widthObjy AND
shipy + widthShipy < objy +widthObjy) THEN
they collide
They then share the same spot (xy positions) so they collide

To do this i would advise you to put the objects positions in an array so you can use a for loop to test the collisions, this saves a lot of typing. e.g.

arrayXpos[12,3,51,51,51 whatever]
arrayYpos[12,3,51,51,51 whatever]

or a 2d array if you are up to it
arrayPos[][]

for (int i=0;i<arrayXpos.length;i++){
if (shipx + widthShipX > arrayXpos[i] +widthObjX AND
shipx + widthShipX < arrayXpos[i] +widthObjX AND
shipy + widthShipy > arrayYpos[i] +widthObjy AND
shipy + widthShipy < arrayYpos[i] +widthObjy){
//collisionEvent;
}

hope this helps!

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