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Thread: Real weather

  1. #121
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    how to know the real forecast for a track? Is there a website? Thanks

  2. #122
    WMD Member Asturbo's Avatar
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    The data of the real weather is obtained from www.openweathermap.org
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  3. #123
    Moderator Bealdor's Avatar
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    Quote Originally Posted by Asturbo View Post
    Update:

    Setting weather to real in the lobby also changes other things. I create a lobby with different parameters, then I log to the DS. When I change the weather to real, looks that every thing resets to previos online session parameters. It's exactly like when you save weather options, instead of that, it loads the parameters of the previous online session. It changes the track, the car and other lobby options. In this new video, the session is in Walkings Glen with the F50 and damage affects performance. When I select Real Weather and save, the car changes to Back Mono, the circuit to Sneterton, and damage to visual. All these parameters was from previous online session. Other parameters as force interior view, allowed assists, cooldown lap also changed. Probably other parameters also would change if it was different in the previous online race.



    The workarround if found is starting the session without touching weather (need to start at least practice). Then exit and log again. In this case if I change the weather, how the previous session was with the parameters I need, I get the right config, even if I change weather options.
    Forwarded...
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  4. #124
    WMD Member Asturbo's Avatar
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    Quote Originally Posted by Bealdor View Post
    Forwarded...
    Thank Bealdor.

    Other curious think I've just observed in the video is that the circuit changes to Snetterton, but the background image of the track, is still Watkins Glen with the caracteristic fences.
    Last edited by Asturbo; 27-03-2018 at 11:50.
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  5. #125
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    Do we know how PCars2 calls the openweathermap api? By cityid or by gps coprdinates?
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  6. #126
    Kart Driver konji's Avatar
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    So i want only confirmation how PC2 fills up weather slot.
    Red numbers - Practice
    Green numbers - Quali
    Grey numbers - Race

    Is it correct? (red 2 is described as clear sky at openweather)
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  7. #127
    Superkart Pilot MaXyM's Avatar
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    In response of Konji's findings, I attempted to sniff network communication between PC2 and mentioned IP: 95.85.63.65.
    It seems the game calls the weather API when you set real time weather in session settings or change the track.
    API is called twice: for current weather and for 8 weather slots. 8 slots means 8 forecast data at every 3 hours. In my particular case, I was starting the game somewhere about 18:30. The game got forecast data for 18:00, 21:00, 00:00 and so forth.

    So far I did quick test with single player AI event. I noticed no any additional calls to API during 30 min practice, 45 min qual nor even at race start.

    I really have no idea how we can get real weather. While weather at a start of the first session might be considered real, further transitions are just a fake. In better case those might be in-time compressed representation of weather changes forecasted for next 12 hours.

    How it does work is very important when preparing to the race. For example, if race length is 1 hour length, but 5 hours after the race will rain (keep in mind those 8 3-hours weather slots loaded from weather service), will rain happen in race? Or weather progression is realistic time-wise?

    Edit: From what Konji said, 4 weather slots are being set for each session. Which does mean, if you go for 1 hour race, you will experience 4 weather "slots", in reality predicted for incoming 12 hours. Isn't it lame?


    Ahh BTW: all game instances uses the same APPID for API calls. Since it seems PC2 is using free of charge service, the API might be easily over-flooded resulting in temporary ban. My guess is, it is what did happen a few months ago, resulting in clear weather for every one trying real weather.
    Last edited by MaXyM; 17-04-2018 at 20:30.
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  8. #128
    WMD Member Asturbo's Avatar
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    Very interesting...
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  9. #129
    WMD Member Mahjik's Avatar
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    Quote Originally Posted by MaXyM View Post
    So far I did quick test with single player AI event. I noticed no any additional calls to API during 30 min practice, 45 min qual nor even at race start.
    PC2 only calls the API once for the session. It gets the current weather and then does a forecast for the rest of the duration of the race session. It does not dynamically update the weather as the session continues based on the API.
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  10. #130
    Superkart Pilot MaXyM's Avatar
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    I would like to be like you say but I already proven it's not true.
    PC2 calls API only once when you are setting the event. Not any more. At least not in case of single player race event.

    And if you missed the point, It cannot effectively predict weather, since it gets forecast for 3-hours time-spans. How can you predict a forecast of 2 hours race started at 18:00 while weather data are for 18:00 and 21:00?

    Another point (Konji's experience, who was using DS started with -searchds). Referring to what he said to me, after connecting to lobby, all 4 slots of weather forecast are filled with data which match weather progression available on openweathermap site. It does mean, for 1 hour race, drivers will experience 12 hours of real live weather. Of course if weather progression will be set to "sync to race". If is set to "Real time", 1 slot is equal to about 1 hour (again referring to Konji). Which is still unrealistic, because there is not such resolution in weather data taken from API. So effectively, one 1-hour slot contains 3 hours of weather from real life.

    Just look at his image. Example event has 1 hour of practice, 1 hour of qual and then race. Then look at hours on openweathermap weather graph. How many hours has been marked for each session? Something is not totally misaligned.
    Last edited by MaXyM; 17-04-2018 at 21:32.
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