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    posted a message on A Random Mob Spawning AI
    Alright...this is the first complex thing I've done with redstone. Until now, the most remarkable thing I've done is a six-switch combination lock...

    Anyways, I was watching the Yogscast play the Minecraft Left 4 Dead mod and thought to myself: "This is nothing like L4D, but wouldn't it be cool if someone made something that was, and it was done in vanilla Minecraft."
    And so this was born:


    That mess of redstone and cloth is a mob Spawning AI that mimics the random zombie spawning AI in the Left 4 Dead games. It will pick one of three spawn points in a room (the massive stone brick building) and spawn mobs from it for a while. Then, it will reset its self and pick another spawn point, which will then repeat the process.

    How it works:
    The heart of the AI is this randomizer (built on the white cloth)


    Basically, it uses 1-clocks to burn out three redstone torches. Because redstone torches come back on at a random time after being burnt out, the outcome of the machine will be completely random. The first torch to come back on will power its corresponding output, and a system of RS NOR latches prevents the other two torches from powering their outputs when they come back on.

    After a random output is chosen, the signal will flow to an extreme delay circuit, shown below (built on blue cloth):

    The circuit consists of two small loops of repeaters hooked up to an AND gate. However, one loop is delayed slightly longer than the other, so the signal flow won't line up for a while after you power them (about a minute in this case). When the delay circuit is powered by the random output, the AND gate's output turns on, because its two inputs no longer line up. It stays on for a minute, until the repeater loops line up again. When it turns off, it switches an RS NOR latch, which resets the whole delay circuit.


    Next comes the zombie spawning system. The output of the AND gate is hooked up to an inverter, which is then hooked up to a 7-clock. This 7 clock connected to a dispenser (which holds the zombie eggs) and a piston that is delayed to activate after the dispenser drops a zombie.

    The 7-clock and the dispenser are on the roof of whatever room this whole setup is in. When there is no signal coming from the AND gate, the 7-clock is being powered, deactivating it. However, for the minute it is activated, the 7-clock will turn on and spawn 28 zombies into the room (a lot, I know, but this was intended to be a co-op thing). They get spawned on the roof, and then the piston pulls the floor out from under them, dropping them into the room.

    Finally, I needed a way to make the entire system reset on its own. This is what I came up with:

    A redstone signal will only pass through this simple machine if the signal is switched from on to off to on again, because of the delay added by that repeater. This allows me to send the signal at the end of all 3 delay circuits back to the original randomizer.

    This is only for one room. Imagine when I start building entire L4D maps with these things. I pray that someone updates MCEdit for the week 7 snapshot so I can just copy-paste this machine a few times, but if not...

    My little brother and I tried the room I built. It works like a charm!
    Posted in: Redstone Discussion and Mechanisms
  • 1

    posted a message on [WIP] [Skyrim!] The College of Winterhold
    Alright...it's currently 1:00 A.M. and my brother and I have been at this for about two hours, so this post may be a little rough, but here we go anyways...

    So, today I was playing Skyrim, doing some quests for the mages of the College of Winterhold, when I thought to myself "Wait. The College would make an excellent Minecraft Megabuild!" After two hours and the recruitment of my brother to help me, we created this:




    This is my first effort at anything close to this size. I started by building the entrance tower. Then, I made the outline of the entire outer wall and two outlying buildings (The Halls of Attainment and Countenance). As of now, I've left out the Hall of Elements, but I'll get to that later in the build. I think that this is going to take a damn long time.

    Some more screenshots:





    This is the Plan...I hope I can make it work


    As you can see, I'm having problems with the pillars of water. If I remove these glass blocks, the water spreads out and won't be in a 1x1 pillar anymore. If there's a way to fix this, let me know!

    Well, that's all I've got for now. It's still a work in progress, and more will be added to it every day (hopefully). Feel free to respond with comments, criticism, suggestions, etc.

    Also, a big thanks to Dangeresque486 for the Gerudoku Faithful texture pack I'm using. It really works with the theme.
    Posted in: Screenshots
  • 1

    posted a message on how to use Arrows
    Quote from UltimateBudgie »
    Press Tab.



    Tab doesn't work for me. I can't shoot arrows at all. Any idea why?
    Posted in: Classic - Survival Mode
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