Hi,
Recently I saw a scenario about a ball which you could pull and when you'd release it the ball bounced very far and high, when the ball would go above the screen, it would place a counter so you'd know how high the ball was. I haven't been able to find it since then, but luckily I had saved the scenario.
I then used the code to display the same counter for my helicopter, if it would go above the screen. And this worked ever since.
Sadly it has been getting an error lately because I've been using a rope which is placed under my helicopter, so people are able to hang on to them for them to be saved. The Rope class isn't using anything from the counter class or the other way around. This is the code the counter uses:
The error never happens when I'm just flying with the helicopter, it doesn't happen when I'm placing the rope under my helicopter. It only happens when I'm removing the rope.
The error :
This would mean that either the helicopter dissappears when I'm trying to delete my rope or that the counter.act:26 code which is : int heliY = heli.getY(); is actually trying to get the Y from the rope, which no longer exists.
When I remove the counter.class from the game, it gives no Actor not in World errors with other classes, this would mean the helicopter doesn't dissappear from the game, because I would get alot of Actor not in World errors.
This is the code for the Touw, which is Dutch for Rope, commented in English.
I don't mind uploading the scenario if you want to see the entire game.
Help would be appreciated, thanks in advance!
public class counter extends Helikoptergame
{
helicopter heli;
public counter(helicopter heli)
{
this.heli = heli;
}
public void addedToWorld(World w)
{
setImage(new GreenfootImage(1, 1));
}
public void act()
{
int heliY = heli.getY();
makeImage(heliY);
int x = heli.getX();
if(x < getImage().getWidth()/2) x = getImage().getWidth()/2;
if(x > getWorld().getWidth() - getImage().getWidth()/2) x = getWorld().getWidth() - getImage().getWidth()/2;
setLocation(x, getImage().getHeight()/2);
}
private void makeImage(int y)
{
y = -y/10;
if(y > 0) setImage(new GreenfootImage("+" + y + "m", 30, Color.GREEN, new Color(0, 0, 0, 0)));
else setImage(new GreenfootImage(1, 1));
}
}java.lang.IllegalStateException: 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. at greenfoot.Actor.failIfNotInWorld(Actor.java:663) at greenfoot.Actor.getY(Actor.java:170) at counter.act(counter.java:26) at greenfoot.core.Simulation.actActor(Simulation.java:565) at greenfoot.core.Simulation.runOneLoop(Simulation.java:523) at greenfoot.core.Simulation.runContent(Simulation.java:213) at greenfoot.core.Simulation.run(Simulation.java:203)
public class Touw extends helicopter
{
private int frame = 2; // Makes the rope drop and go back accordingly
private int dropRopeCount = 0; // Makes the rope drop slowly
private boolean civilOnRope = false; // Returns wheter a civilion is hanging on the rope.
Actor ropeCivilIntersect = null;
public void act()
{
if(exploded == false){
setRopeLocation();
setHelicopterRotation();
setRopeImage();
checkCivilIntersect();
checkSpacePressed();
System.out.println(frame);
}
}
public void setRopeLocation(){
if(getRotationHeli == 0 && rechts == true){
setLocation(heliX+37, heliY+75);
}
else if(getRotationHeli == 4 && rechts == true){
setLocation(heliX+30, heliY+76);
}
else if(getRotationHeli == 8 && rechts == true){
setLocation(heliX+28, heliY+79);
}
else if(getRotationHeli == 12 && rechts == true){
setLocation(heliX+23, heliY+82);
}
else if(getRotationHeli == 16 && rechts == true){
setLocation(heliX+17, heliY+82);
}
else if(getRotationHeli == 20 && rechts == true){
setLocation(heliX+11, heliY+82);
}
else if(getRotationHeli == 24 && rechts == true){
setLocation(heliX+5, heliY+82);
}
else if(getRotationHeli == 18 && rechts == true){
setLocation(heliX+14, heliY+82);
}
else if(getRotationHeli == 10 && rechts == true){
setLocation(heliX+26, heliY+79);
}
else if(getRotationHeli == 345 && rechts == true){
setLocation(heliX+49, heliY+65);
}
else if(getRotationHeli == 350 && rechts == true){
setLocation(heliX+45, heliY+70);
}
if(getRotationHeli == 0 && links == true){
setLocation(heliX-37, heliY+75);
}
else if(getRotationHeli == 356 && links == true){
setLocation(heliX-30, heliY+76);
}
else if(getRotationHeli == 352 && links == true){
setLocation(heliX-28, heliY+79);
}
else if(getRotationHeli == 348 && links == true){
setLocation(heliX-23, heliY+82);
}
else if(getRotationHeli == 344 && links == true){
setLocation(heliX-17, heliY+82);
}
else if(getRotationHeli == 340 && links == true){
setLocation(heliX-11, heliY+82);
}
else if(getRotationHeli == 336 && links == true){
setLocation(heliX-5, heliY+82);
}
else if(getRotationHeli == 342 && links == true){
setLocation(heliX-14, heliY+82);
}
else if(getRotationHeli == 350 && links == true){
setLocation(heliX-26, heliY+79);
}
else if(getRotationHeli == 15 && links == true){
setLocation(heliX-49, heliY+65);
}
else if(getRotationHeli == 10 && links == true){
setLocation(heliX-45, heliY+70);
}
}
private void setRopeImage(){
dropRopeCount++;
if(civilOnRope == true){// If civilian is on the rope, show right picture
// if space is pressed, drop rope
if(Greenfoot.isKeyDown("space") && frame < 42 && dropRopeCount == 3){
setImage("touwburger("+frame+").png");
frame ++;
dropRopeCount = 0;
}
else if(frame==42 && Greenfoot.isKeyDown("space") && dropRopeCount == 3){ //removes bug that stops the rope from going up after it has dropped completely
setImage("touwburger("+frame+").png");
dropRopeCount = 0;
}
//
else if(frame>0 && dropRopeCount == 3){
setImage("touwburger("+frame+").png");
frame --;
dropRopeCount = 0;
//Remove rope if it is entirely back in the heli
if(frame == 1){
getWorld().removeObjects(getWorld().getObjects(Touw.class));
ropeCount = 0;
}
}
}
else{//If there is no civilian on the rope, display normal picture
// If space is pressed, drop rope
if(Greenfoot.isKeyDown("space") && frame < 42 && dropRopeCount == 3){
setImage("touw("+frame+").png");
frame ++;
dropRopeCount = 0;
}
else if(frame==42 && Greenfoot.isKeyDown("space") && dropRopeCount == 3){ //removes bug that stops the rope from going up after it has dropped completely
setImage("touw("+frame+").png");
dropRopeCount = 0;
}
//Drops rope even when space is not pressed
else if(frame>0 && dropRopeCount == 3){
setImage("touw("+frame+").png");
frame --;
dropRopeCount = 0;
//Remove rope if it is entirely back in the heli
if(frame == 1){
getWorld().removeObjects(getWorld().getObjects(Touw.class));
ropeCount = 0;
}
}
}
}
private void checkCivilIntersect(){
if(checkSpacePressed() == true){// removes error "Actor not in World"
Actor ropeCivilIntersect = getOneIntersectingObject(Burger.class);
if(ropeCivilIntersect != null && frame ==42){ // Only lets civilians on rope when it has dropped at least 35 frames
civilOnRope = true;
getWorld().removeObject(ropeCivilIntersect);
}
}
}
private boolean checkSpacePressed(){ //Makes sure pressing space doesn't cause a bug in repeating setRopeImage()
if(Greenfoot.isKeyDown("space")){
return true;
}
else{
return false;
}
}
}
