Discussions

Set speed doesn't set the speed of only one class but of whole Greenfoot. so if you say Greenfoot.setSpeed(35); and then Greenfoot.setSpeed(15); Greenfoot will only use the second of this values. Also in the botom right of greenfoot there is a scrollbar to set Greenfoots speed.

Do you want to write the code for me? :D I am not able to do this :(

Thanks, i think i got My expected answer

<Code Omitted> Yes, because if Enemies.main is null the call to Enemies.main.getWorld() causes a NullPointerException. However, you can simply change the order: <Code Omitted> In this version, due to "lazy evaluation", if Enemies.main is null then Enemies.main.getWorld() will not be evaluated.

Some other thing is wrong wrong now. This shows up java.lang.ArrayIndexOutOfBoundsException: 3 at Snake.act(Snake.java:34) 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) I uploaded this scenario so you you can see whats wrong. I would be very grateful. http://www.greenfoot.org/scenarios/6773 This is how i did it.

We could say that the code to get a square/rectangle is built into the GreenfootImage of the Actor. Each actor has an 'image' which IS a rectangular area. Within the bounds of this rectangle is where the image of the actor appears. You only need to create a GreenfootImage object of appropriate size and draw along each edge the image of the brick (just program it to draw one edge, then rotate the main image to continue drawing the brick image around all four edges).

ahhh, thanks just a simple error.

Never mind I got it, thanks though!

Thanks

Well apparently, the C++ copy method returns: The effective length of the sequence of characters copied to s. This may either be equal to parameter n or to size()-pos, whichever is smaller (see description of parameter n). which also makes me notice that the code I gave above doesn't account for when the specified substring would be longer than the string itself. But you can check that for yourself, adjust the second parameter of substr appropriately, and calculate the amount "copied" by subtracting the first parameter value from the second (or even just taking the length of the

Is the middle bit all supposed to go into the world class?

I wuv yu~ nohomo but iwuvyu~

thank you

Thank you very much!

Being 'getOneObjectAtOffset' returns one object (if any) whose image intersects the point in question, your actor could end up partially overlapping the food and not detect it. Better would be to use the 'getOneIntersectingObject' method (unless, of course, you want to make it much more difficult to 'eat' the food -- cutting the 'hit-zone' in half). At any rate, when food is being placed, you should use the 'getOneIntersectingObject' method; otherwise it may be very difficult (or impossible) for the actor to find the food without hitting the obstacle.