hello. i want to make a lives timer so that when an asteroid hits earth, earth loses a life until it reacher zero, then Greenfoot should stop. any advise?
dillyduck wrote ...
2017/2/13
Lives counter
Have a variable that is equal to the amount of lives you want earth to have, each time an asteroid hits earth decrease the lives variable by one if lives equals zero do Greenfoot.stop();.
private int lives;
public Space()
{
// Create a new world with 600x400 cells with a cell size of 1x1 pixels.
super(1050, 400, 1);
prepare();
score = 0;
showScore();
time = 2000;
showTime();
lives = 3;
showLives();
}
/**
* If an Asteroid hits Earth, remove life until 0
*/
private void removeLives()
{
lives--;
showLives();
if( lives == 0 )
{
Greenfoot.stop();
showEndMessage();
}
}
private void showLives()
{
showText("Lives:" + lives, 400, 350);
} 
The code that was showed looks fine to me. What doesn't work exactly, otherwise there's no way that I can help you.
where do i put the BigAsteroid and SmallAsteroid to collide with the Earth in order to make the lives counter go down
In your earth code do:
and use the same code for the SmallAsteroid.
if(isTouching(BigAsteroid.class))
{
Space space = (Space)getWorld();
space.removeLives();
removeTouching(BigAtseroid.class);
}im making final touches and when i put everything to gather it gives me an error on line 4 that says removeLines() has private access in Space. Any idea on how to fix?
dillyduck wrote...
im making final touches and when i put everything to gather it gives me an error on line 4 that says removeLines() has private access in Space. Any idea on how to fix?danpost wrote...
Make it 'public' instead of 'private'./**
* If an Asteroid hits Earth, remove life until 0
*/
public void removeLives()
{
lives--;
showLives();
if( lives == 0 )
{
Greenfoot.stop();
showEndMessage();
}
}Nosson1459 wrote...
danpost wrote...
Make it 'public' instead of 'private'.dillyduck wrote...
it gives me an error on line 4 that says removeLines() has private access in Space.I didn't say it could be anything else but the question was "Any idea on how to fix?" meaning the problem so I thought that by him "it" means the error/problem so he has to edit that method not just edit it.
You need to login to post a reply.