Lives in my game continually decrease instead of just by 1

Programming Questions

bokin6

Lives in my game continually decrease instead of just by 1

in Programming Questions • 1 year ago

I've made a very rough herding game.

I have the dog that herds the sheep which is the player and an enemy (the hawk) that eats the sheep.
Currently when the hawk hits the sheep the lives decrease as long as the two are intersecting (which is often for quite a while). I need the lives to only descrease by 1 when the hawk and sheep intersect. I would also like if the sheep disappeared when this happened but one thing at a timre.

this is the specific area in the code where it happens:

    if ( intersectv(enemy.hawkpos, enemy.d, sheep[i].pos, sheep[i].d) == true ) {
      // background(100, 0, 0);
      lives--;
    // freeLife.active = false;
    }

here's a link to the .zip file of my code:
http://www.auriceye.com/outline10.zip

Replies(6)

v.k.

Re: Lives in my game continually decrease instead of just by 1

1 year ago

maybe something like this will do it.

if ( intersectv(enemy.hawkpos, enemy.d, sheep[i].pos, sheep[i].d) == true ) {
// background(100, 0, 0);
If(!isIntersecting)
{
lives--;
isIntersecting = true;
}
// freeLife.active = false;
} else
{
isIntersecting = false;
}

PhiLho

Re: Lives in my game continually decrease instead of just by 1

1 year ago

If you make the sheep to disappear, it will no longer intersect your hawk, and your problem would be solved!
You can also tag the sheep to mark it as attacked, and if tagged, no longer count the intersection toward the score.
A bit what v.k. suggested, but I guess the code above will just decrement the lives at half the rate it did...

v.k.

Re: Lives in my game continually decrease instead of just by 1

1 year ago

I made a test, i think is working :-) look:

int x = 100;
int y = 100;
int sz = 100;
boolean wasOutside = true;
int count = 999;
PFont font;
void setup()
{
size(300, 300);
background(90);
// Uncomment the following two lines to see the available fonts
//String[] fontList = PFont.list();
//println(fontList);
font = createFont("Arial", 40);
}
void draw()
{
if (isOver(x, y, sz))
{
background(90);
if (wasOutside)
{
count --;
wasOutside = false;
}
}
else
{
background(180);
wasOutside = true;
}
fill(255);
stroke(80);
rect(x, y, sz, sz);
// println(count);
textFont(font);
fill(0);
text(count, 132, 197);
}
boolean isOver(int x, int y, int sz)
{
if ( mouseX >= x
&& mouseX <= x+sz
&& mouseY >= y
&& mouseY <= y+sz)
{
return true;
}
else
{
return false;
}
}

PhiLho

Re: Re: Lives in my game continually decrease instead of just by 1

1 year ago

Ah, sorry, I thought the else was on the wasOutside test, not on the isOver one. Indeed, it works. Good job.

bokin6

Re: Lives in my game continually decrease instead of just by 1

1 year ago

thanks everyone for your help! I have it mostly figured out... except it only decreases once. The first time the enemy hits the sheep it calculates -1 life but after that it doesn't.

Here's what I ended up doing:

//check for collision with sheep and hawk
    if ( intersectv(enemy.hawkpos, enemy.d, sheep[i].pos, sheep[i].d) == true && enemy.hit == false ) {
      // background(100, 0, 0);
      image(redsheepimg, sheep[i].pos.x, sheep[i].pos.y);
      lives--;
      enemy.hit = true;
    }

then inside my enemy class I made the boolean variable:

boolean hit;
int d;

Enemy() {
    hawkpos = new PVector(width/2, height/2);
    speed = new PVector( random(-1, 1), random(-1, 1));
    speed.normalize();

    hit = false;
    int d = 50;

    if (hit == true) {
        hit = !hit;
      }

}

PhiLho

Re: Lives in my game continually decrease instead of just by 1

1 year ago

Ah, I didn't understand the sheep had many lives... In general, the hawk takes the sheep and there isn't another chance...
You can try v.k.'s idea which indeed works, (must be adapted to each sheep), or reset the boolean if not intersecting. Somehow, our solutions converge, I think (my idea of class field with v.k.'s idea of testing).

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