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  Demon Attack 4K [Atari 2600] [Work In Progress]  (Read 2650 times)
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Offline zeroone
« Posted 2010-12-01 00:04:27 »

http://meatfighter.com/java4k2011/demonattack4k/













Post your high scores.  Let's see who has what it takes.
Offline SquashMonster

Senior Member


Medals: 1
Projects: 2



« Reply #1 - Posted 2010-12-02 21:52:50 »

I got 3615 on my first time.

I really like all the different graphics, especially of enemy shots.  That's the sort of touch you don't see very often.  The gameplay is pretty solid too, though it seems like the player's craft sometimes coasts a little bit if you attempt to fire and quickly change direction.  Is that intentional?

Do enemies start to fall to the ground to attack before splitting is introduced?  I first noticed it on the splitting level, but I can't be sure.  If they do both start at once, I'd recommend moving that apart, since different concepts should be introduced in different levels.  And if there's anything new after splitting, I recommend moving that earlier so people actually see it, unless I just suck at this game Wink.

Finally, are you using a while/yield loop for timing?  If so, try using Thread.sleep(desired frame delay) instead.  Even with the code to ignore an Exception I've found that it takes less room (your mileage may vary) and, more importantly, it prevents the game from taking up 50% of CPU and needlessly spinning up the user's fan.
Offline zeroone
« Reply #2 - Posted 2010-12-03 01:14:11 »

Quote
I got 3615 on my first time.

Nice.  Thanks for playing.

Quote
I really like all the different graphics, especially of enemy shots.  That's the sort of touch you don't see very often.  The gameplay is pretty solid too, though it seems like the player's craft sometimes coasts a little bit if you attempt to fire and quickly change direction.  Is that intentional?

Do enemies start to fall to the ground to attack before splitting is introduced?  I first noticed it on the splitting level, but I can't be sure.  If they do both start at once, I'd recommend moving that apart, since different concepts should be introduced in different levels.  And if there's anything new after splitting, I recommend moving that earlier so people actually see it, unless I just suck at this game.

Demon Attack was one of my favorite game for the Atari 2600.  I tried to stay as authentic as possible to the original.  The enemy types, behaviors and weapons are introduced in exactly the same sequence.  The game demands a certain level of skill before revealing everything that it has to offer.  A cursory glance may suggest that Demon Attack is just a Space Invaders ripoff, but in actuality, it provides a much richer gaming experience.

Quote
Finally, are you using a while/yield loop for timing?  If so, try using Thread.sleep(desired frame delay) instead.  Even with the code to ignore an Exception I've found that it takes less room (your mileage may vary) and, more importantly, it prevents the game from taking up 50% of CPU and needlessly spinning up the user's fan.

A link to the source code of all of my games is located at the bottom of each of the associated web pages.  I am actually using yield because someone mentioned that it has more consistent timing on some machines.  I never obtained any proof of that, but I felt for 4K, full CPU consumption probably did not matter.
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Offline SquashMonster

Senior Member


Medals: 1
Projects: 2



« Reply #3 - Posted 2010-12-03 01:24:46 »

Ah, if you're trying to mimic a game's gameplay faithfully then you shouldn't take my suggestions on how to change the gameplay, heh.

And Thread.sleep() is only noticeably less consistent if you don't change the amount of time you pass to it based on the output of something like nanoTime.  I'd recommend trying both and seeing which packs better, at least.
Offline pjt33
« Reply #4 - Posted 2010-12-03 10:37:04 »

And Thread.sleep() is only noticeably less consistent if you don't change the amount of time you pass to it based on the output of something like nanoTime.  I'd recommend trying both and seeing which packs better, at least.
No, with Thread.sleep you also have to work around a Windows bug whereby (IIRC) it uses a more or less precise timer depending on whether the value you pass is a multiple of 50 or not.
Offline Terminalord

Senior Newbie





« Reply #5 - Posted 2010-12-09 02:31:49 »

7020 - had this game when it was new also. Bringing back some fond memories.

Terminalord
Offline zeroone
« Reply #6 - Posted 2011-03-06 00:27:42 »

<a href="http://www.youtube.com/v/g9EbbOJgfxs?fs=1&amp;amp;hl=en_US" target="_blank">http://www.youtube.com/v/g9EbbOJgfxs?fs=1&amp;amp;hl=en_US</a>

http://www.youtube.com/watch?v=g9EbbOJgfxs
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