How do I make my actor die, if he falls down a hole, to the bottom of the world?
Dom wrote ...
2012/3/4
Game Help
You basically said what you wanted to code:
"If my actor is at the bottom of the world, then remove it."
Put this in your actor class (the one that dies) in the method that makes him fall, right after the setLocation() or move() statement. If it is in a move() method, you may have to add a line right after the calling statement in the act() method 'if (getWorld() == null) return;'.
1 2 3 4 5 | if (getY() == getWorld().getHeight() - 1){ getWorld().removeObject(this); return;} |
How do I create:
1) Menus,
2) Scorecounters
3) Livescounters
If anyone could just shed some light on these?
There subjects often come up on the discussion board. There is much information to be gained from them. Do a search on them and check them out.
I had a look and I cant find the exact answer I'm looking for, for any of these items. I need a simple explanation of how to create each of these, and I cant find that.
The menu one is by far the hardest one to create. You can use re-usable sub-classes (copy/paste) for this one (go here).The other two are, simply put, a matter of creating Actor subclasses with instance integer counters and putting 'updateImage()' methods in them to create and set the current image needed (and public methods for changing the counts).
A simple Scoreboard class would be something like:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | import greenfoot.*;import java.awt.Color;public class Scoreboard extends Actor{ int score = 0; public Scoreboard() { updateBoard(); } private void updateBoard() { setImage(new GreenfootImage("Score: " + score, 20, Color.black, new Color(0, 0, 0, 0))); } public void add(int addVal) { score += addVal; updateBoard(); } public int getScore() { return score; }} |
You can use the same code for the lives counter with minor modifications and some extra code to check for 'no life remaining':
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | import greenfoot.*;import java.awt.Color;public class Lifeboard extends Actor{ int lives = 0; public Lifeboard() { updateBoard(); } private void updateBoard() { setImage(new GreenfootImage("Lives remaining: " + score, 20, Color.black, new Color(0, 0, 0, 0))); } public void add(int addVal) { if (lives == 0 && addVal == -1) { // ^ (lost a life and no lives remaining) // play sound, showGameOver/Final score // whatever you want to do for ending game Greenfoot.stop(); return; } lives += addVal; updateBoard(); } public int getLivesLeft() { return lives; }} |
For the lives code, when i tried to compile it, it said that 'cannot find symbol - variable score'
1 2 3 4 | private void updateBoard() { setImage(new GreenfootImage("Lives remaining: " + score, 20, Color.black, new Color(0, 0, 0, 0))); } |
I missed that one in re-writing it for that class.
Change the work 'score' in line 3 of your last post to 'lives'.
Set up a reference to the Scoreboard and Lifeboard in the world class when you create them, and store them in world class instance Object variables
Then in the world constructor, or a method that it calls, add them to the world
Of course, the location to add them is of your choice.
Now, in the actor class, when you need to adjust the score, create a reference to the world it is in (let us just say that you named your world sub-class 'Arena') and access the lifeboard and scoreboard from there.
arena.scoreboard.add(10);
1 2 | public Scoreboard scoreboard = new Scoreboard();public Lifeboard lifeboard = new Lifeboard(); |
1 2 | addObject(scoreboard, 100, 20);addObject(lifeboard, 500, 20); |
1 2 3 | Arena arena = (Arena) getWorld();Scoreboard sBoard = arena.scoreboard;sBoard.add(10); // adds 10 to the score |
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