im trying to make a game where an ant is chasing lots of other small and im trying to make them face away and i don't know how
any ideas?
nooby123 wrote ...
2011/7/12
how do you make an object point away from another object?
You could take a look at the source code of my 'Catch the fly scenario' ( http://greenfootgallery.org/scenarios/3221 )
This is the code you might be interested in.
Write this in your chased Actor:
Ant a = new Ant(); int x = a.getX() - getX(); int y = a.getY() - getY(); r = Math.toDegrees(Math.atan2(x, y)) - 270; setRotation(-(int) r); move(...speed...);
Oh sorry forgot an 'int' :
Ant a = new Ant(); int x = a.getX() - getX(); int y = a.getY() - getY(); [b]int[/b] r = Math.toDegrees(Math.atan2(x, y)) - 270; setRotation(-(int) r); move(...speed...);
Oh sorry forgot an 'int' :
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Ant a = new Ant();
int x = a.getX() - getX();
int y = a.getY() - getY();
int r = Math.toDegrees(Math.atan2(x, y)) - 270;
setRotation(-(int) r);
move(...speed...);
my editor looks like this:
Ant a = new Ant();
int x = a.getX() - getX();
int y = a.getY() - getY();
int r = Math.toDegrees(Math.atan2(x, y)) - 270; <- It says here " possible loss of precision found
setRotation(-(int) r); :doublerquired: int "
move(2);
soory again but this terminal error thingy keeps popping up when i press the run button and saying
java.lang.IllegalStateException: The actor has not been inserted into a world so it has no location yet. You might want to look at the method addedToWorld on the Actor class.
at greenfoot.Actor.failIfNotInWorld(Actor.java:659)
at greenfoot.Actor.getX(Actor.java:157)
at EvenSmallerAnt.turnAway(EvenSmallerAnt.java:51)
at EvenSmallerAnt.act(EvenSmallerAnt.java:18)
at greenfoot.core.Simulation.actActor(Simulation.java:498)
at greenfoot.core.Simulation.runOneLoop(Simulation.java:461)
at greenfoot.core.Simulation.runContent(Simulation.java:197)
at greenfoot.core.Simulation.run(Simulation.java:187)
You cannot call getX() or getY() from the constructor of an object (public ())
Move the code that uses these calls into the act method and you should be good.
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