Tutorial: How to edit the trader files

[Atrocious]

Usually you don't have to leave the level. You can just quicksave/-load. Also, if only a few items like medkits and ammo show up, but no weapons, then the trader file is probably broken.

About the correctness of the formula I don't know.

[FourAces]

No, the save/load did not work, but I was not editing the stock, just the formula for prices. It must be stored in the save game data. The formula that I posted about the purchase price (from another thread) seems to be correct, since the ".2, .8" I have means that a hostile Sakharov offering me about 25% of the value for my items (not 50%) is correct. Bartender was offering me more due to the fact that he is not hostile and his range for the same item is ".2, .5".

[FourAces]

I need some help with the buy and sell conditions at the top of the trader files. Specifically what does this mean exactly?
{+bar_darklab_document_done} bar_after_darkvalley_sell

I know that for barman this is the condition that must be met before the
bar_after_darkvalley_sell portion of the file will be activated and used. What I need to know is why, when I add a modified version of that to my Ecologist's sell line, it does not work properly.

{+bar_darklab_document_done} ecolog_after_darkvalley_sell
This makes Sakharov act as if he is being attacked, and then somehow lets him phase though the window and out into the hallway of the mobile lab. I thought that it was a simple flag that means that as long as the darkvalley documents were returned to barkeep then this would be activated. Obviously I was wrong, and I can find no decent descriptions of how, or why.

Is there another way trigger new buy&sell points along the main story, so that I can add some variety to my traders?

Thanks!

[Atrocious]

Originally Posted by FourAces

Is there another way trigger new buy&sell points along the main story, so that I can add some variety to my traders?

It's the right way of doing it - just do it right.

When traders act stupid, you have a syntax error in your trade file.

Sell condition:
sell_condition = {+yan_kill_brain_done} ecolog_after_brain_sell, ecolog_start_sell

Translated (the stuff in brackets represents the meaning of the word in ltx configs):
if ( { } ) info portion yan_kill_brain_done is given ( + ) then go to section (in this file - would probably even work with different files) ecolog_after_brain_sell else ( , ) go to section ecolog_start_sell.

Example with a new section:
sell_condition = {+yan_kill_brain_done} ecolog_after_brain_sell, {+bar_darklab_document_done} ecolog_after_darkvalley_sell, ecolog_start_sell

So it's: if X16 done then ... else if X18 done then ... else default.
Note that you have to create the whole new section ecolog_after_darkvalley_sell because it doesn't yet exist!

[Supernatur4L]

Everyone thank Admiral for stickifying this
Thank you sir.

[FourAces]

Originally Posted by Atrocious

It's the right way of doing it - just do it right.

I just wanted to confirm that my reading of the logic behind the structure of the flags was correct. Thanks!

[FourAces]

Well I have just worked out that the equation for the Sell sections is

[someone_sometime_sell]
item_name = A, B

where ((A+B)/2) * 100% = the price the trader will sell item_name for.

It was that illogical multiplication that was confusing me. I just thought that I would spell it in case anyone else is having problems.

Atro, I understood your explanation of A+B/2 = C% but I thought that C% was added not multiplied to the base price (100%).

Cheers for the guide!

[WARCATT]

Ok I'm going to try this out.....on OL.....

[Acid81]

Could someone please take a look at this trader file here and tell me why the items iv modded doesnt show up after "fabric" ?

I have no clue what could be wrong here.

[xArcadianx]

Can somebody upload a trader mod so traders sell EVERYTHING ? i MEAN INCLUDING QUEST ITEMS SUCH AS DOGTAILS,BLOODSUCKER JAWS, ARTIFACTS.. etc PLEASE ! thank you !