Discussions

Thank you, I just now caught the misspelling after I posted the code.

There is no 'stopLoop' method listed in the GreenfootSound API documentation I gave a link to above. Try again. Make use of the documentation. You do not have to memorize it. Just give it a once over to see what is available in the class.

The simplest way to determine where the hit occurs on the brick is to separate the horizontal and vertical movements of the ball (do them individually, checking for collision after each). You will need another method like the one given above to deal with horizontal movement collisions. If you really want accurate brick-ball collision bouncing, check out the code to my Pong Pinball scenario.

I have an uploaded scenario called Space Invaders Movement Demo from which a review of its code might help you. EDIT: I just looked at it again myself. It might not be the best coding for determining if an invader has another below it. I probably decided not to use the 'getObjectsAtOffset' method because one could be found quite a margin below it (with invaders killed off from rows in between) and the way I did it only required one check.

What have you tried? or (if not anything), how do you think this can be appoached (what individual steps, specifically, do you think can be used to accomplish this)?

Hey danpost! thank you for the quick reply , moving lines 49 - 54 was a super simple solution thank you for your help it was greatly appreciated!

Actually ive found a way.

Oh! Thanks for the hint I got it now! In regards to creating fields for the idle images, that's a great idea thanks! Thanks for replying danpost!

Your Enemy actors are not turning -- that is, their rotation is always zero. So, passing 'getRotation()' for the direction of a new Bullet object does not make any sense. There are a couple other anomalies in your code. Line 10 appears to do nothing. Line 55 adjusts the direction of a bullet one degree left for no apparent reason. All your speeds (for both the enemies and the bullets) are negative values which is counter-intuitive. As far as the direction of the bullets, you need to use 'turnToward' with the coordinates of the opponent (or calculate, using trig functions, the angle of

@MrKryptus See the following. "Posting code? read this!"

Remove the line that is causing the error: <Code Omitted>You cannot execute that method until the Spaceship1 object is created and added into a world. Where you have the line, it is executed while the object is being created and before it is added into a world. Change all remaining 'world' in your code to 'getWorld()'. The only thing that should be new in the class are lazer objects. When the 'act' method is executed, which executes the 'shoot' and 'checkKeyPress' (missing from given code) methods, a Spaceship1 object exists and is in a world. You do not want

You were right. I downloaded a WAV to MP3 converter and used the new MP3 file and it worked successfully. Sorry to waste your time, I should have guessed this was the problem all along. Thank you.

An instance variable is (a non-static) one that is declared outside of any method (as opposed to being declared within a method).

Use 'setPaintOrder' method of World class (possibly -- if understood correctly).