So I want a loop to prepare all the stuff I have in my world in a random place and one class with a random number of that
class in the world but I can't find a loop method that may help? Have I over looked a loop?
Avast wrote ...
2013/9/14
Prepare loop method
You should use a for loop. Thats the easyest way.
To add a fixed number of actors to the world you can use a for loop like this one:
This loop will add a fixed number of your actors at random places in the world.
To add a random number of actors your can use it like this:
1 2 3 | for (int i = 0; i < numberOfActors; i++) { addObject(new YourActor(), Greenfoot.getRandomNumber(getWidth()), Greenfoot.getRandomNumber(getHeight()));} |
1 2 3 4 | int randomNumber = Greenfoot.getRandomNumber(10);//add something between 0 and 9 actors;for (int i = 0; i < randomNumber; i++) { addObject(new YourActor(), Greenfoot.getRandomNumber(getWidth()), Greenfoot.getRandomNumber(getHeight()));} |
Do I have to repeat this for each object I want to create for the fixed actors? And what is "i".
"i" is the name of an 'int' field. In this instance it is being used as the counter for the loop. The loop will start with 'int i = 0' which will be the value for the first execution of the loop. On each subsequent execution of the loop, the value is changed (in this case by 'i++') until the condition 'i < randomNumber' becomes false, at which point the loop is not executed anymore and the statement following the loop block will be executed (if any).
You will only need to use a loop when a specific set of instructions are executed multiple times. So, for those objects that only one of its type are placed in the world, you do not need to use a loop.
Peach wrote...
what is the difference between i++ and i = i + 1?You need to login to post a reply.