is there anything that can help me?
I need a code so that I have a life of an actor in the form of images, then attack if the actor lives in the form of the image will be reduced.
thank you.
RobiJefferson wrote ...
2013/5/13
Code Help
yes, that's what I was looking for
A simple (though somewhat lengthy) class for what you are looking for could be the following. This class creates an image that displays a framed area containing any number of hearts, each one representing a life for the character that the user controls. You will need to set the image of this class to "herz.png" located in the 'symbols' category. This is just to copy the image file into the images folder of your scenario. Afterwards, you can reset the image of this class to 'No image' (if you wish).
To work with this class, from the world:
From an actor class:
Create a Lives object in the world constructor (or method it calls) with
import greenfoot.*;
public class Lives extends Actor
{
private int maxLives; // holds the maximum lives allowed
private int lifeCount; // holds current number of lives remaining
private int height; // holds the height of the image (frame-height)
// @param lives is initial and maximum number of lives
// @param high is the height of the image (frame-height)
public Lives(int lives, int high)
{
lifeCount = lives; // save number of lives starting with
maxLives = lifeCount; // save the maximum number of lives allowed
height = high; // save the image height
updateImage(); // create the image to display
}
// call this method when losing a life
public boolean loseALife()
{
if (lifeCount == 0) return true; // lives cannot be negative
lifeCount--; // decrement lives remaining
updateImage(); // create the new image to display
return lifeCount == 0; // return game over flag
}
// call this method when gaining a life
public void gainALife()
{
if (lifeCount == maxLives) return; // maximum lives set to five
lifeCount++; // increment lives remaining
updateImage(); // create the new image to display
}
// call this method to get the number of lives remaining
public int getLifeCount()
{
return lifeCount;
}
// internal method to create the image to display
private void updateImage()
{
int buffer = height/8;
GreenfootImage image = new GreenfootImage(maxLives*height+(maxLives+1)*buffer, height); // create the base image
image.drawRect(0, 0, image.getWidth()-1, image.getHeight()-1); // add a frame to base image
GreenfootImage life = new GreenfootImage("herz.png"); // get image of heart
life.scale(3*height/4, 3*height/4); // resize heart image
for (int i=0; i<lifeCount; i++) image.drawImage(life, height/8+buffer+i*9*height/8, buffer); // add hearts to base image
setImage(image); // set the image of this object
}
}((Lives)getObjects(Lives.class).get(0)).gainALife(); // or if (((Lives)getObjects(Lives.class).get(0)).loseALife()) gameOver(); // or Lives lives = (Lives)getObjects(Lives.class).get(0); if (lives.getLifeCount() == 0) gameOver();
Lives lives = (Lives)getWorld().getObjects(Lives.class).get(0);
int maximumLifeCount = 5; int lifeImageHeight = 30; addObject(new Lives(maximumLifeCount lifeImageHeight), /* x, y */);
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