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Assault Andy

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11th January, 2004 at 05:06:47 -

Hey everyone,
I've been working on a project with Yuyu for a little while now. It's a gta style clone and we've done a fair bit. We have tried to make it as flexible as possible, including map makers, customizable graphics. But we can't get around the traffic and the Peds. We've made several small traffic engines, failing somewhere in each. I've gotten very close in one, and it worked great until I overcomplicated it with roads and detectors going everywhere.

If you know of a good traffic engine or could shed any light on the idea, please feel free.

-Andy & Yuyu

 
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Shen

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11th January, 2004 at 06:10:14 -

The only game I can remember doing something like this is Harry Cars (or whatever it was) which used detectors at every junction showing what way the cars could go, and they turned at random.

 
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The Chris Street

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11th January, 2004 at 07:49:35 -

Yup. Say for instance you had a road like:


__|__

A T-Junction.

You'd put a detector in the middle and then make an event which is something like:

ALWAYS: Set Alterable Value A of Car to random (1) - so it randomly flickers between Value 0 and 1.

Only one event while action loops and car is overlapping detector, and Alterable Value A of Car = 0: Set direction to UP

Only one event while action loops and car is overlapping detector, and Alterable Value A of Car = 1: Set direction to CONTINUE

Course, it'd need to be more complex than that, but as far as Im aware, you'd have to do something like this.



 
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Smeggy

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11th January, 2004 at 08:02:24 -

Sounds a very difficult task, I hope you get around it..

 
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Cazra

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11th January, 2004 at 08:15:58 -

I've never played GTA but I've know that Jak II has an engine similar to it.
Like Circy said, use the turning detectors. For pedestrians, give them a more random movement.


 
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AndyUK

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11th January, 2004 at 08:30:40 -

smarties have the answer
but they just wont tell me!!

i would start with the cars as bouncing ball objects and objects at set points in the road to turn them
mabye using flags to stop/start

 
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Zane



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11th January, 2004 at 11:36:34 -

oh god. the memorys of taxi dash ar coming flooding back.
im attempting to make one now using the direction calculator. its not going well. ill keep trying though.

 
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Mr Coffee



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11th January, 2004 at 12:42:18 -

Well, if you really want to make it good, you should have the cars change lanes, pull in and out of parking spots, etc. You would need to use fastloop and link detectors to each car. The cars would then use the detectors to see if it's safe to change lanes, turn right on red, etc. The cars would simply drive around randomly, changing lanes every once in awhile. I actually don't think it's that complicated, just very time consuming to program. The hard part would be programming the cars to navigate a parking lot. That would require quite a bit of work to pull off.

 
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AndyUK

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11th January, 2004 at 14:10:34 -

you could get some ideas if you look at the ai in games like grand theft auto.
the normal traffic is simple.
they just stop when they get too close to other cars and red lights and turn at the right time.
the police cars are more tricky to code because they chase you when you're wanted and aviod other cars by changing lanes.

 
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Kris

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11th January, 2004 at 14:51:30 -

hey, that reminded me of this little train simulation i started.

Works a treat, I just got bored of it too soon.

Image

edit: what bastard admin got rid of my amazing signiture?

Image Edited by the Author.

 
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11th January, 2004 at 15:12:22 -

eh? we can't edit signatures. you need database access.

 
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Kris

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11th January, 2004 at 15:14:06 -

then it was obviously one of the admins with that power

 
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11th January, 2004 at 15:22:24 -

Shadowcaster, maybe? He has the signature-changing power.

Well, here's a VERY simple engine, andy.

0 <---- Car
_|_ <---- Your basic t-junction.
^
Sensor

When the car hits the sensor, set alterable value a to random 1-3. 1=->, 2=->, 3 = ^.

 
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yuyu



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11th January, 2004 at 20:04:13 -

Thanks for helpin out.

 
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Ashman

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12th January, 2004 at 07:31:26 -

Kris you can take comfort in the fact that they also changed my rating! Or you can laugh at me, either way is good.

 
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