I would like to create an invisible square in which it would act as an out of bounds area that once my frog was in he would be removed. Can i have help in how i would code that??
LobsterL wrote ...
2018/4/29
Making an invisible square in greenfoot
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Just add a subclass of Actor to create boundaries:
Create the Boundary objects and add them into your world in you world constructor or prepare method
import greenfoot.*;
public class Boundary extends Actor
{
/** giving the actorr an invisible image */
public Boundary()
{
setImage(new GreenfootImage(5, 400)); // adjust size as needed
}
/** removing an intersecting frog */
public void act()
{
if (isTouching(Frog.class)) removeTouching(Frro.class));
}
}Thanks. Was just wondering how i would ignore the remove frog if it is also touching a log>
LobsterL wrote...
Thanks. Was just wondering how i would ignore the remove frog if it is also touching a log>i would also like to know how to change the color of that image so i can see where it is in the world. So that I can position it correctly.
LobsterL wrote...
i would also like to know how to change the color of that image so i can see where it is in the world. So that I can position it correctly.getImage().fill();
i have created the code for the log and boundary but am getting an illegal statement exception error
public boolean OnLog()
{
if (isTouching(Log1.class) || isTouching(Log2.class) || isTouching(Log3.class))
{
return true;
} else
{
return false;
}
} if (isTouching(Frog.class)&&frog.OnLog() == true)
{
return;
}
else
{
removeTouching(Frog.class);
}
You have not given enough code and have not provided the exact error message to facilitate anyone helping you.
this is the error Actor not in world. An attempt was made to use the actor's location while it is not in the world. Either it has not yet been inserted, or it has been removed.
and that is both lines of code in which the error stated
LobsterL wrote...
this is the error Actor not in world. An attempt was made to use the actor's location while it is not in the world. Either it has not yet been inserted, or it has been removed.
and that is both lines of code in which the error statedimport greenfoot.*; // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
/**
* Write a description of class Frog here.
*
* @author (your name)
* @version (a version number or a date)
*/
public class Frog extends Actor
{
private String[] move = {"frogup1.png","frogup2.png","frogup3.png","frogup4.png","frogup5.png","frogup6.png"};
private int frameCounterMove = 0;
private int reload;
int lives = 3;
Lives life = new Lives();
/**
* Act - do whatever the Frog wants to do. This method is called whenever
* the 'Act' or 'Run' button gets pressed in the environment.
*/
public void act()
{
move();
removeWhenTouching();
OnLog();
}
public void move()
{
if (Greenfoot.isKeyDown("up"))
{
setLocation(getX(), getY()-5);
setRotation(360);
animateOnMove();
}
else if (Greenfoot.isKeyDown("left"))
{
setLocation(getX()-5, getY());
setRotation(270);
animateOnMove();
}
else if (Greenfoot.isKeyDown("right"))
{
setLocation(getX()+5, getY());
setRotation(90);
animateOnMove();
}
else if (Greenfoot.isKeyDown("down"))
{
setLocation(getX(), getY()+5);
setRotation(180);
animateOnMove();
}
}
public void animateOnMove()
{
reload++;
if(reload==3)
{
setImage(move[frameCounterMove]);
frameCounterMove++;
if(frameCounterMove >= move.length)
frameCounterMove=0;
reload = 0;
}
}
public int getLives()
{
return lives;
}
public void loseLife()
{
lives = lives - 1;
}
public void removeWhenTouching()
{
if(isTouching(Car1.class))
{
removeTouching(Frog.class);
if(getLives() == 0)
{
}else{
loseLife();
}
reset();
}
if(isTouching(Car2.class))
{
removeTouching(Frog.class);
if(getLives() == 0)
{
}else{
loseLife();
}
reset();
}
if(isTouching(Car3.class))
{
removeTouching(Frog.class);
if(getLives() == 0)
{
}else{
loseLife();
}
reset();
}
}
public void reset()
{
if(this.getWorld() instanceof MyWorld)
{
((MyWorld) this.getWorld()).reset();
}
}
public boolean OnLog()
{
if (isTouching(Log1.class) || isTouching(Log2.class) || isTouching(Log3.class))
{
return true;
} else
{
return false;
}
}
}
import greenfoot.*; // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
import java.awt.Color;
/**
* Write a description of class Boundary here.
*
* @author (your name)
* @version (a version number or a date)
*/
public class Boundary extends Actor
{
Frog frog = new Frog();
/** giving the actorr an invisible image */
public Boundary()
{
setImage(new GreenfootImage(1000, 300)); // size of the boundary
// getImage().fill(); //used to position the boundary
}
/** removing an intersecting frog */
public void act()
{
if (isTouching(Frog.class)&&frog.OnLog() == true)
{
return;
}
else
{
removeTouching(Frog.class);
}
}
}
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