/**
* Prüft, ob wir auf einen Wurm gestoßen sind.
* Wenn ja, wird er gefressen. Wenn nein, passiert nichts.
*/
public void lookForWorm()
{
if(canSee(Worm.class))
{
eat(Worm.class);
}
}
luna124 wrote ...
2012/9/8
Little Crab
The problem is not is this method. It is either in the 'canSee(class)' or the 'eat(class)' method.
Thanks, but I don't know where I can make any changes because I'm a total beginner.
/**
* Return true if we can see an object of class 'clss' right where we are.
* False if there is no such object here.
*/
public boolean canSee(Class clss)
{
Actor actor = getOneObjectAtOffset(0, 0, clss);
return actor != null;
}
/**
* Try to eat an object of class 'clss'. This is only successful if there
* is such an object where we currently are. Otherwise this method does
* nothing.
*/
public void eat(Class clss)
{
Actor actor = getOneObjectAtOffset(0, 0, clss);
if(actor != null) {
getWorld().removeObject(actor);
}
}public void act()
{
move();
if(atWorldEdge())
{
turn(17);
}
if(Greenfoot.getRandomNumber(100)<20)
{
turn(Greenfoot.getRandomNumber(45)-45);
}
move();
}
I do not see any mistakes here, either. But, also, i do not see any calls to 'lookForWorm'.
I do not know if you intended this, but I also see two 'move()' calls in the method.
Our teacher told us to call the method "lookForWorm"- not my idea ;-) Do you think the problem are the two
"move()" methods?
I think you misunderstand. By 'call the method', we mean to add a statement in the act to run that method (I believe you are thinking that the name of the method should be 'lookForWorm').
The two move methods will not really present a problem. Although the crab will be traveling twice as fast (when able).
Putting it another way: your act method calls move() twice, without calling lookForWorm() at all; it should instead call move() only once and should also call lookForWorm() once.
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