Please help me to create an explosion when i shooting an enemy.
ali18 wrote ...
2017/5/1
How to create explosion when shooting an enemy?
Create a class for the explosion. Give it the image you desire. Add an int field to it to count act cycles. Have the counter incremented each act cycle. When the counter value reaches some relatively small number (test and adjust it to suit your needs), have the object remove itself.
If the explosion is animated, have the object remove itself when the animation is complete.
I don't know what you mean? I have got a image already and i have already made a class called 'explosion'. Can you please help me by giving me the code? This is what ive got in my class that shoots the bullets
This is the code ive got in my bullet class.
public void shoot()
{ if ("space".equals(Greenfoot.getKey()))
{
bullet shot=new bullet();
getWorld().addObject(shot,getX(),getY());
shot.setRotation(getRotation());
}
}
public void act()
{
move(5);
kill();
remove();
}
public void kill()
{
Actor rocket=getOneIntersectingObject(rocket.class);
if (rocket != null)
{
World myWorld = getWorld();
getWorld().removeObject(rocket);
}
}
public void remove()
{
Actor rocket = getOneObjectAtOffset(0, 0, rocket.class);
if (rocket != null)
{
World world;
World myWorld = getWorld();
getWorld().removeObject(this);
}
else
{
if(getX()==599||getX()==0||getY()==0||getY()==399)
{
getWorld().removeObject(this);
}
}
}Lines 19 will never be true as you call kill and remove any intersectin rocket before calling the remove method.. I would suggest replacing line 18 with line 9 and taking line 13 and inserting it at line 23. Then, remove line 4 and the kill method. You can also remove line 21 and 22 and insert the following line there:
getWorld().addObject(new explosion(), getX(), getY());
OK, i done what you have asked and now when i shoot the rocket, it disappears when the bullet hits them, and the explosion appears, however, the explosion just stays there without disappearing.
the new code within actor that shoots is:
The new code within my bullet class is:
public void shoot()
{ if ("space".equals(Greenfoot.getKey()))
{
bullet shot=new bullet();
getWorld().addObject(shot,getX(),getY());
shot.setRotation(getRotation());
}
}{
/**
* Act - do whatever the bullet wants to do. This method is called whenever
* the 'Act' or 'Run' button gets pressed in the environment.
*/
public void act()
{
move(5);
remove();
}
public void remove()
{
Actor rocket=getOneIntersectingObject(rocket.class);
if (rocket != null)
{
getWorld().addObject(new explosion(), getX(), getY());
getWorld().removeObject(this);
getWorld().removeObject(rocket);
}
else
{
if(getX()==599||getX()==0||getY()==0||getY()==399)
{
getWorld().removeObject(this);
}
}
}
}You need an int field in your explosion class to be used as a timer. Have the act method increment its value every time it executes; and have it check the value of the field for some nominal value for removing itself from the world. If you run into issues doing this, show your attempted code in the explosion class and ask for help on what you are struggling with.
You need to login to post a reply.