GTR2 Weather

Weather.txt

• Weather.txt is in UserData\Log
• It is automatically generated every race session
• To prevent it from being re-generated, set it read-only: Right Click > Properties > Attributes: Read-only
• Game generated weather.txt files are pretty boring and rarely exhibit any changing weather, even when Changeable weather is set in-game
• Use an app like Autosim Weather Generator for GTR2 to generate more plausible weather scenarios. It has a rather nice and intuitive visual, drag-and-drop style interface that anyone can grasp.

Autosim Weather Generator:

(1) Autosim Weather Generator Demonstration, (2) Using the Autosim generated weather.txt in GTR2:

Changeable Weather

• Setting Rain to Changeable in-game is the only setting which will use Weather.txt

Threads

• Efforts to create weather file sets like we create new sky sets?
  • "Has there ever been an effort to create weather.txt files for all the kinds of weather conditions, something like how various people over the years have made sky textures for all the kinds of weather conditions?"
• Weather files?
• GTR2 not reading or generating weather.txt
• Changeable Weather Problem
• Cloudy skies, Rainy days in GTR2
• can't really see the dry line after a rain
  • "you need to wait around 8 laps then you will see what is shown on screenshots"
  • "What I still wonder ... does the track really gets dry after rain finally ?" [1]
    • "yes the track does indeed get dry but it takes some time but the more wet the track is the faster it will dry out..."
• Rainfall Settings Observations
  • List of Rainfall, Track, Ambient, Conditions, Forecast, Tyres Autoselected at various rain levels
• Off course there are dry and wet paths in the AIW files!
  • "At least in all base tracks from Simbin. It is defined as Lateral Offsets in the WP_path. First parameters are dry path and second are wet path."
• Revisiting the Changing Weather Patch Mod
  • "Problem: Temperance variance too wide: Can be 10C Ambient and 20C Track or 30C+ Ambient 40C+ Track"
  • "Problem: Temperature doesn't go up during the day and down during the night"
  • "Problem: Temperature doesn't go down with rain meaning wet tires overheat on a wet track because the track temperature doesn't go down being wet"
  • "Theory: I don't think these problems are solvable but a good work-around might be to replace the UserData\LOG\weather.txt with a 'good all-round' weather file that can address the first two issues (I think)."
  • "Modifying Average rain = 0.x to a higher value just gave me higher chance of constant rain. Think it just a multiplier of chance of a rain day?"
  • Hex edit EXE to enable changeable weather broken in Steam GTR2
• How to make a dynamic weather during race sessions in GTR2?
  • Weather files explained - NoGripRacing Forums

Apps

• Autosim Weather Generator for GTR2
• Weather Generator for GTR2
• Weatherfile Generator for GTR2 2.3

Car Setups

• Nissan 350Z - Monza (100% Rain)
• Porsche 911 Bi-Turbo - Monza (100% Rain)
• Mosler MT900 - Monza (100% Rain)
• Gillet Vertigo Streiff - Spa

Modding

• Simple Tire Modding for GTR 2

Related

• RFE Weather - RFE Plugin Series 1.1 for rFactor
  • RFE Update for rFactor Default Tracks 1.2
    • Sardian Heights RFE 2.1 - Sardian Heights RFE pista convertida para o plugin weather.
    • Lienz GP RFE 2.1 - Lienz GP RFE convertido para plugin weather
    • F1 1988 Track Pack RFE - All featuring season accurate laps, weather, and grids, complete with the RFE weather plugin to provide the best possible experience.
    • Toban Raceway RFE - Unofficial conversion of the Toban Raceway track to "Plugin RFE Weather" adding weather effects.
    • More Race Department "weather" search results for rFactor downloads

Shovas's Weather Scratchpad

weather.txt

File Structure and Synatx:
- Confirm Rainfall Changeable in-game
- Use spaces not tabs
  ^ Symptom: Conditions/Forecast Icons stop working reliably.
- Use space indents to be safe and to be consistent with original weather.txt
- Check brackets
- End with empty blank line

?Forecast is the last minute of the session for Practice1 45min
~ Practice2 45min
~ Qualify1 30min
~ Qualify2 30min
~ Warmup 10min
~ Race 60min: Forecast is Minute 1
  - Race is special: Time is stopped until you start race, then you can't get back to the timing screen with the weather forecast
  - Any Minute with a different Conditions?
- There's something weird about 'minimum threshold of change' to update the Forecast icon
  
SCRATCH: HAT file caching appears to cache weather file data so consider enabling auto rebuilding:

  Always Rebuild HAT="1" // Build HAT database everytime tracks are loaded (for development purposes)
  
  ^ SCRATCHED: Nope, still happens.

Minute{} Blocks:
- Must specify numeric minute Minute=1.23 or else GTR2 seems to think the last Minute is the initial conditions and the other Minutes are ignored 

Rain:
- Rain is not the same as Conditions
- No, doesn't seem to be: Does Rain specify max Conditions? Ex. Rain 80% means max Conditions=80?
- Rain:
  - Can't test because Rainfall < Changeable doesn't generate weather.txt
	Rainfall:	Track,		Conditions,				Forecast
	None: 		Dry,		Sunny,					Sunny
	10%:  		Damp, 		Cloudy w/Rain,			Cloudy w/Rain
	20%:  		Damp, 		Cloudy w/Rain,			Cloudy w/Rain
	30%:  		Damp, 		Cloudy w/Rain,			Cloudy w/Rain
	40%:  		Wet,		Cloudy w/Rain,			Cloudy w/Rain
	50%:  		Wet,		Cloudy w/Rain,			Cloudy w/Rain
	60%:  		Wet,		Cloudy w/Rain,			Cloudy w/Rain
	70%:  		Wet,		Cloudy w/Rain,			Cloudy w/Rain
	80%:  		Flooded,	Cloudy w/Thunderstorm,	Cloudy w/Thunderstorm
	90%:  		Flooded,	Cloudy w/Thunderstorm,	Cloudy w/Thunderstorm
	100%: 		Flooded,	Cloudy w/Thunderstorm,	Cloudy w/Thunderstorm

Conditions Icon (Conditions):
- Conditions is not the same as Rain
- Confirmed 240318: 
	0-61 Sunny (Sun)
	62-90 Rainy (Cloud w/Rain)
	91-100 Stormy (Cloud w/Rain and Lightning)

Forecast Icon (Conditions):
- Requires Minute{} block
- When no Minute{} blocks are specified or if there are no more Minute{} blocks remaining then Forecast seems to be the next closest dry/wet level (not sure if it goes up or down or why)
  - Maybe it assumes a return to initial session conditions
    - This seems to be confirmed 240319
- Forecast seems to change 30sec ahead of Minute{} with the change or maybe it's 1 Minute{} block ahead
- Confirmed 240318
	0-61 Sunny (Sun)
	62-90 Rainy (Cloud w/Rain)
	91-100 Stormy (Cloud w/Rain and Lightning)

Track Wetness (On/OffPathWetness):
- Confirmed 240318 ... actually this may have been just dynamically progressing based on Conditions
	0-5 Dry
	6-35 Damp
	36-75 Wet
	76-100 Flooded
- Track wetness (Dry/Damp/Wet/Flooded) is not the same as Conditions (Sunny/Rainy/Storm)
- Related to:
  - OnPathWetness
  - OffPathWetness
- Track wetness does not progress (drier or wetter) by On/OffPathWetness in Minute{} progression.
  - It seems to be based on time, Conditions, and number of laps (the more AI the faster)
- Track wetness floods dynamically based on Conditions and un-floods dynamically
  - Dry->Wet->Flooded->Wet->Dry then:
	  - 0 AI 50min still flooded, ...
	  - 1 AI 50min still flooded, ...
	  - 10 AI 60min flooded->wet, ...
	  - 20 AI 70min flooded->wet, ...
	  - 29 AI 75min to wet, never dry
- Scratch: I bet I could include and progress any of the parameters inside Minute{} blocks (eg. OnPathWetness, OffPathWetness)
  ^ Scratched: Wetness does not seem to progress in Minute{} blocks.
    - But Wetness does progress so it seems it's a function of time-conditions-temperature and those do progress in Minute{} blocks

Default Temperature Progression: Ambient 20+, Track: 22+

Weather start offset by 30sec in sessions(?)

5 Minute{}s +20 steps:
2.5m to Rainy, 4m5s to Stormy for both Real Time and Time Scaled Weather
- Minute 3 = 60 Conditions
- Minute 4 = 80 Conditions

10 Minute{}s +10 steps:
6min to Rainy, 9min to Stormy for both Real Time and Time Scaled Weather
- Minute 6 = 60 Conditions
- Minute 8 = 80 Conditions

15 Minute{}s +6.666 steps:
9min to rainy, 13min to Stormy for Real Time and Time Scaled Weather
- Minute 9 = 60 (59.994) Conditions
- Minute 13 = 80 (86.658) Conditions

30 Minute{}s +3.333steps:
Never gets to rain, never gets to Stormy on Real Time or Time Scaled Weather (
- 10m45s to *Forecast* rainy but never gets there
  - Minute 18 = 60 (59.994) Conditions

Real Time Weather and Time Scaled Weather:
- Time Scaled Weather does not seem to be related to Daylight Acceleration
- Case: No acceleration of Damp to Dry in 15min warmup
  - I had no Minute{} blocks and only the initial Wetness params so no progress of Wetness I guess
- ? Time is scaled down but not up
 - ? If you have less minutes in weather.txt than the actual session then the weather plays out in real-time. It doesn't get stretched to the length of the session. 
  - ? If you have more minutes in weather.txt than the actual session then the weather plays in in compressed time so that it can complete in the length of the session (TODO: Confirm)