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Buildings on moving platforms- soon to be possible?

Discussion in 'Mapping Questions & Discussion' started by lerlerson, Mar 25, 2008.

  1. lerlerson

    lerlerson L2: Junior Member

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    If you head over to CVG, you'll see an interview about Gold Rush (FYI, it's not Escort, it's Payload.) and the new unlockables.

    Well, Robin Walker mentions that they were toying with the idea of a Payload map where Red defends a moving platform, and I quote, "which Engineers would be able to build Sentries on."

    Interesting, I wonder if we'll actually get a Source update which will enable us to do that.

    Here's a link: http://www.computerandvideogames.com/article.php?id=185321
     
    Last edited: Mar 25, 2008
  2. dirtyminuth

    dirtyminuth L5: Dapper Member

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  3. lerlerson

    lerlerson L2: Junior Member

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    Last edited: Mar 25, 2008
  4. Cereal_Killer

    Cereal_Killer L1: Registered

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    So what happens right now if you try to build a sentry on a moving platform?
     
  5. lerlerson

    lerlerson L2: Junior Member

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    Explosions.
     
  6. ryodoan

    ryodoan Resident Bum

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    To those who are lazy:
     
    Last edited by a moderator: Aug 29, 2015
  7. Koei

    Koei L4: Comfortable Member

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    No. It stays floating in the air. Just build on a car in....uhm..mario_kart and then drive the car away ;)
     
  8. lerlerson

    lerlerson L2: Junior Member

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    Oh. Good point, I actually remember seeing that... but...

    Well, I suppose considering that the only example of building something on a moving platform fresh in my mind was building a teleporter on top of the train in Well...
     
  9. dookiebot

    dookiebot L1: Registered

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    I remember building a sentry on top of the moving train in Well. The train left and the sentry was in mid air. It was funny looking but it gets destroyed the next time the train comes through.
     
  10. Jeebies

    Jeebies L2: Junior Member

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    I noticed on mario kart now you can build on the cars and they move with them. I'd love to know how they did it. I'm going to decompile and see if I can figure it out.
     
  11. Jeebies

    Jeebies L2: Junior Member

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    I can't figure out why this version of mario's carts can be built on. The only flags they have are HL1 Train and Is unblockable by player. I don't see anything special about this func_tracktrain.

    I'm very interested in doing this. I made this post a while back:
    http://forums.steampowered.com/forums/showthread.php?t=646213

    and there's a suggestion there I haven't had a chance to try yet. Actually, I was going to try it once I knew more about hammer and understood what he was suggesting, but haven't gotten back to it...

    (btw the name of this mario version is mario_kart_cp_a8_8f)
     
  12. zbandito

    zbandito L1: Registered

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    It's possible that the change is a result of TF2 being altered in one of the recent downloads.. even some of the comments in the interview linked above indicate Valve has done a lot of work 'on the back end'. Have you tried a previous version of the map running on a current version of TF2 to see if the behaviour is the same or different?
     
  13. Jeebies

    Jeebies L2: Junior Member

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    No, I haven't tried that.

    Here's something I noticed though. The whole cart is the func_tracktrain, where I've read other people just make one nodraw brush - tie that to tracktrain, then parent their collection of brushes that make up the car/train to that moving nodraw brush. I wonder if that's where the difference - as in if you did it that recommended way, you'd get the car moving out from under the floating sentry.

    I think that maybe the case, because I know when I first started and tried to make this, I did it like mario, where I had a box car all tied to the func_tracktrain and I didn't have the problem where the sentry floated in place - instead, I was never able to build the sentry to begin with. It looked like it would have been able to build though, if the blueprint thing wouldn't stop jumping back and forth real fast, skipping around like the refresh didn't match the speed of the moving train.

    I notice that's the same thing that happens on this mario, the blueprint jumps back and forth. Except in mario you see it flash from the red x telling you you can't build there to the outline showing you can and if you hit the left mouse real fast you can end up putting it down when it's just at the right time and it sticks. (hope this makes sense - you may have to try it to see).

    I wonder if the speed of the train on mario is just closer to being in sync with that blueprint refresh. I maybe far off, but that's what it looks like to me.
     
    Last edited: Mar 28, 2008
  14. Jeebies

    Jeebies L2: Junior Member

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    wups, double post...
     
  15. zbandito

    zbandito L1: Registered

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    I think that is the discrepancy between the rendered world and the physics world as communicated from server to client... similar 'jumpy' behaviour is somewhat common with lifts, for example (try it in thirdperson)...
     
  16. Bonafide

    Bonafide L6: Sharp Member

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    mariokart "cars" arent exactly cars though are they.
     
  17. phatal

    phatal L6: Sharp Member

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    Here's a new mod that does this plus multiple buildings can be built as well. We have this up as I speak just trying it out.

    TF2: Parent Buildables To Moving Entities (Elevators, Cars etc)