Nav Error: Map is Unplayable

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Summary:

How do I fix this? I've already made a nav file.

Nav Error: Map is Unplayable

Kevimaster 25 Jul 2009 15:37

Alright, I'll list out the exact process I went through when making this map, maybe there isn't a problem with the flow but I problem with how I marked it or something.

1. Build the map in hammer and save

2. Run map, BSP normal, VIS normal, RAD normal, no HDR, run game when finished

3. Get into game, continue on nav error, put in commands director_stop, nb_delete_all, exec nav_mode

4. go to the first open room and place nav_mark_walkable

5. nav_generate_incremental

6. repeat steps 4 and 5 until the entire map is nav'd.

7. go around and nav_build_ladder on all the ladders and check to make sure they are connected to two regions/zones/whatever they're called

8. go to the spawn area and mark PLAYER_START

9. go to the saferoom and mark CHECKPOINT

10. go to panic event and mark everywhere I want panic zombies to spawn and move around in mark BATTLEFIELD

11. mark BATTLESTATION on all the places that I want the survivorbots to be able to fight the panic event from

12. done! nav_save. exit left 4 dead and restart from Hammer

13. NAV ERROR: Map is unplayable! and everything else after that is basically me floundering around trying to fix it and completely and utterly failing as far as I can tell, what do I do to fix this?

Re: Nav Error: Map is Unplayable

Megadude 25 Jul 2009 16:58

Edit: 12. done! nav_save. nav_analyze. nav_save again.exit map and restart map.

Re: Nav Error: Map is Unplayable

Kevimaster 25 Jul 2009 18:07

Sorry, I'm still having problems, I tried restarting the whole thing. but to no avail, still map unplayable. and hordes don't come after me when they spawn (only the panic event hordes actually spawn)

Re: Nav Error: Map is Unplayable

mrfranswa (guest) 25 Jul 2009 19:24

here's a quick trick to making a working nav:

1- Make the nav. Pretty simple, place a lot of walkable surfaces and make sure it works. That means putting in the checkpoints/ player starts/ finale or whatever. Afterwards, turn on the director by saying director_start.

2- Restart the map, and check you console. If you built the nav correctly the only error you should see is, "nav needs a full nav_analysis". If there are any other errors such as "cannot compute flow" or whatever, it means there is a break in your nav mesh. Here you can do two things. The first of which is to type nav_trouble_report. Generally if you see a portion of your nav lit up there is a problem reaching that portion. Play the map and have your bots follow you. The director will spawn infected for you to fight. if a bot has a lot of problems with a spot and needs to either rewalk far away to get to your position, or "teleports", there is generally a problem with your mesh around that point. The three biggest causes of this are meshes not connecting through doorways and stairs, ladders (I've learned to use ladders as little as possible), and meshes connecting through props, (the bot thinks they can walk to another nav point through a static prop).

3- ONLY WHEN THE ONLY ERROR IS "nav needs a full nav analysis", and you have played through the map numerous times finding errors do you need to actually analyze the nav.

Re: Nav Error: Map is Unplayable

mrfranswa (guest) 25 Jul 2009 19:36

oh,

and you don't have to save a nav_analyze. It automatically saves the mesh and restarts the map with the good analyzed mesh.

Re: Nav Error: Map is Unplayable

Kevimaster 26 Jul 2009 02:54

didn't work, I got the 'nav needs a full nav analysis' message and I did that, but it still didn't work and I didn't see any further errors. I'll try taking out my elevator tomorrow, maybe thats the problem, after that I'll try ladders, after that I'm just going to make a completely flat map thats a line and see if I can get the nav to work for that :P

Re: Nav Error: Map is Unplayable

1sg_heartless 29 Jul 2009 06:17

i know how to do nav for the elevators. Had the same issue when i first started using em.
http://www.youtube.com/watch?v=nF13NRDFvDg

millerman (guest) 05 Oct 2010 02:54

this is what i get with nav_troubel_report. and i get what he says.. nav error. map unplayable. but map runs. zombies spawn. tanks spawn off triggers. i did notice without nav_edit 1 on i cant get mollys or ammo i have in a tent . but it works with it on. what is that from? i see fire when i throw them. i get to safe room/checkpoint and map ends as its supposed to. this is my first map ever so i know its not gonna be used ever. but id like to complete 1 lvl completly and get the hang of this before i start to make something i wanna try to post to the public.
] nav_trouble_report
Orphan check found 13 areas
Missing Battlefield check passed
Missing Finale check passed
Missing Checkpoint check passed
Overlap check passed
Corner-to-corner connection check passed
Climb links from stairs check passed
Connection to overlapping area check passed
Long horizontal connection check passed
Double connections check passed
Floating/interpenetrating world check passed
Areas with non-walkable connections check passed
Long vertical connection check passed
Short vertical one way connection check passed
Disconnected ladder check passed
Overlapping ladder check passed
Non-climbable ladder check passed
Tiny nav area check passed
Selected 13 trouble areas

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