hi everyone,
i need your help again. I want an actor to die when a certain picture of another actor touches him.
thanking you in anticipation :)
Benedict wrote ...
2012/6/10
Actors death
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if(getOneIntersectingObject(Enemy.class) != null)
{
if(){
getWorld().removeObject(this);
return;
}
}Sorry, I accidentally posted while writing the code. This is the actual code:
When defining your variables in the actor's class that is being attacked, just define the image that will destroy it as killer.
if(getOneIntersectingObject(Enemy.class) != null)
{
Actor enemy = getOneIntersectingObject(Enemy.class);
if(enemy.getImage() == killer){
getWorld().removeObject(this);
return;
}
} i dont understand, should i replace "killer" by the name of the image of Enemy.class or what?
The best way to handle it, is to add an instance String variable to hold the name of the image that the actor currently displays (set the variable in the constructor; and anywhere else that the image may change at). Then use the following code:
where 'killer.png' is the name of the image you are checking for and 'currentImage' is the name of the String instance variable that holds the name of the current image.
if (getOneIntersectingObject(Enemy.class) != null)
{
Enemy enemy = (Enemy) getOneIntersectingObject(Enemy.class);
if ("killer.png".equals(enemy.currentImage)) getWorld().removeObject(this);
}i figured out an easier way, but still really need your help
i made a variable named "health".
public void getHurt()
{
health--;
}
public void die()
{
if(health <= 0)
{
setImage("death.PNG");
Greenfoot.delay(5);
getWorld().removeObject(this);
}
}
now the problem is that i cant figure out how to activate getHurt(); when the certain picture of the other character touches him.
thanking you in anticipation :)
Use the same code as above; just replace 'getWorld().removeObject(this)' with 'getHurt()' and adjust the image name.
Did you declare the variable 'currentImage' as a String type variable, and set it to the filename of the image that the actor is currently using?
hello I have got the same problem.
I have got a sheep that will die if it touches a bear for example.
how will it happens?
i set the code from danpost but there is a errore with the 'currentImage'
it cann't find the symbol. why?
You need to set the String variable of 'currentImage' to the name of the image (i.e. "bear.png" or "sheep.png") that the object is currently showing. So, for example, let us say you have 2 images for the bear object. You could start your class this way:
Then, let us say that when the bear eats a sheep, its image changes:
This code is just an example of how to set up a String to track to current image of an actor. The actual use of it in the example is not neccessary, but the setting up and code usage of it is valid.
@Girl2012, if you are just removing the sheep when it touches a bear, and the bear image will not change, then you really do not need to use a 'currentImage' variable in your code.
Normally, you will see the methods 'eat(Class cls)' and 'see(Class cls)' together; called by a statement similar to:
where the 'see(Class cls)' method is:
You could move the image manipulation code to a seperate method, and instead of 'if(see)eat;', you could use:
where 'alterImage(String img)' is:
public class Bear extends Actor
{
String image1 = "bear.png";
String image2 = "bear2.png";
String currentImage = image1;private void eat(Class cls)
{
Actor actor = getOneIntersectingObject(cls);
getWorld().removeObject(actor);
currentImage = image2;
setImage(currentImage);
}if (see(Sheep.class)) eat(Sheep.class);
private boolean see(Class cls)
{
return getOneIntersectingObject(cls) != null;
}if (see(Sheep.class))
{
eat(Sheep.class);
alterImage(image2);
}private void alterImage(String img)
{
currentImage = img;
setImage(currentImage);
}There are more replies on the next page.
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