Routing restriction discussion

Aegir · Post by **Aegir** » 16 Nov 2006 10:59

Uwe wrote:Ok, thanks to you guys, I understood it now I don't know yet what examples will be in, so if anyone has some really clever restriction for a certain task, post it somewhere and maybe it'll get included at some point.

If you haven't already gotten it down already, I'd suggest writing something about using route-restrictions for filtering high and low speed traffic on big trunk lines.

Similar for filtering high-powered engines on steeper routes, and lower powered engines for that long-as-heck-snaking-route-around-the-mountains.

Uwe · Post by **Uwe** » 23 Dec 2006 23:01

Alright, I finally got round to start writing a guide on routing restrictions. A work-in-progress version can be found at http://www-user.tu-chemnitz.de/~dou/ttdx/alpha.html. It is nowhere near finished, though. I won't be able to continue working on it over the Christmas days, so I'd doubt there will be further updates this year. Could a patchdev (JGR?) please confirm that the information given in the guide so far is correct?

JGR · Post by **JGR** » 09 Jan 2007 19:48

-->Uwe

I must say that your guide is very good.
I can only spot one minor error:

These are the valid NW signals. For the diagonal rails (leftmost one and second from right), they face towards the left (west), for horizontal tracks they are the ones for the upper (north) track facing east, for the vertical tracks it's the one on the lefthand (west) track facing upwards (north).

It should say west.

Thanks for your contribution.

JGR

The Irish · Post by **The Irish** » 20 Feb 2007 19:28

I was finaly able to spot a bug which I had the feeling it is there but somehow never captured.
In below screen, the signal leading into the tunnel, for which train 58 has reserved the track has the restrictation:

Order of current station is not Sundwood
or
Order of next station is not Sundwood

As you can see, the current order is Sundwood, but somehow it still reserves the track to that signal, where as the correct route should be down the electrified line running in parallel trough a signal without restrictions.

Savegame and config attached. running on r1380

Scautura · Post by **Scautura** » 20 Feb 2007 20:48

That's because boolean logic dictates that statement will be true...

The station of current order is Sundwood, and hence that part is false.
The station of next order is Bristol Victoria, that part is true (not Sundwood == true)

As far as I read it, that should mean it's a valid option for the train to choose.

Try using "And" instead of "Or", and that should solve the problem (in this case, at least)
Edit: After a little testing (10 minutes running the scenario) it seems to work fine.

Perhaps a new restriction would help as well? Adding one for electrification, so as to prevent electrified trains trying to go down non electrified routes?

Scautura

DaleStan · Post by **DaleStan** » 20 Feb 2007 21:17

That is really something the pathfinder should deal with automatically, but being able to test total HP of all non-electric engines could be useful.

phantom25 · Post by **phantom25** » 24 Mar 2007 06:12

Reading this post, I have a suggestion.

I see that current boolean logic possible is:

and
or
xor (exclusive or)

Isn't "not" also an boolean operator?

Just a thought, is it much effort to introduce?
So to be able to set additional criteria modifier i.e. not electrified?

DaleStan · Post by **DaleStan** » 24 Mar 2007 06:20

Just reverse the test of the item you want to negate. (eg, test "<= 100" instead of ">100", or "is red" instead of "is green".)
And "electrified rail"/"not electrified rail" is not an interesting test. The test is attached to the signal, not the train, so you'd just be testing a constant.

phantom25 · Post by **phantom25** » 26 Mar 2007 17:12

OK, thanks for that clarification.

Now understood...

Scautura · Post by **Scautura** » 26 Mar 2007 18:24

How about "Powertrain"? (Or however you'd like to phrase it) e.g. "is not electric" to prevent an electric train going down the wrong alley and getting stuck on a non-electrified track?

Oh poo... Now I'm repeating myself... As you replied, I could cover that as "Total HP of non-electric trains is 0"

Scautura (Now I just have to learn ASM and "make it so"

)

Post by **WWTBAM** » 27 Mar 2007 07:21

a suggestion for the guide Uwe, ive used depot of current order on trains that need to go through a specific platform on a station so they dont terminate and have to find their way elsewhere. if they arent ordered to stop at the tation.

squishycube · Post by **squishycube** » 03 Apr 2007 12:08

I just started using the routing restrictions signals so I may be missing something, but is it true that only the default goods are listed in the Cargo list? Because I was missing paper in there. Maybe a later version of this patch could read cargo's from GRF?
Great patch anyhow, it already made my game a much smoother.

Post by **PikkaBird** » 03 Apr 2007 12:56

squishycube wrote:is it true that only the default goods are listed in the Cargo list?

No, it's not true. Not here at least.

m3henry · Post by **m3henry** » 03 Apr 2007 13:42

for instance 'Train cargo' does it ask for the train's cargo capacity type or current cago loaded

squishycube · Post by **squishycube** » 03 Apr 2007 15:23

A screenshot for more clarity.
The two signals I circled with red are "cargo is not wood" and "cargo is wood or goods". I'd like to be able to change the second one to "cargo is not paper"

Pookey · Post by **Pookey** » 03 Apr 2007 23:24

m3henry wrote:for instance 'Train cargo' does it ask for the train's cargo capacity type or current cago loaded

The trains cargo capacity type, so if it has empty coal hoppers and it says 'cargo=coal' the train will be allowed through.

JGR · Post by **JGR** » 04 Apr 2007 21:18

Squishycube:
This will be fixed in the next nightly. (Commit r1543)
If it still doesn't work or you find any bugs, please post; although it should work fine.

JGR

squishycube · Post by **squishycube** » 05 Apr 2007 12:59

Thanks for the quick action JGR. It doesn't really work though, see screenshot.
Extra notes:
If "Paper" is selected, "Food" is displayed. If "Food", "Beer" or "Fish" are selected, "Cannot remove obstacles on land" is displayed, like in the screenshot.

I didn't test whether the signal actually works for Food when I select Paper, but it didn't work for Paper.

Also, as not to clutter the Nightly discussion thread: I love the new support for enhanced tunnel tracks in a direction not perpendicular to the tunnel direction! I got to use it immediately.

Post by **PikkaBird** » 05 Apr 2007 13:18

I'm thinking this is more likely a problem with an outdated cargo grf, rather than with the restricted signaling patch.

squishycube · Post by **squishycube** » 05 Apr 2007 14:30

I don't know about you, but I use the one on this page: http://www.ttdpatch.net/newgrf.html
New cargo types (v0.12) last updated Sep 15 2005 01:34:48 GMT.
I think I started using the newcargo's later then that date.

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