Variable seaon lengths and other season variables

hobophobe · 2018-03-20T03:20:21.341Z

Would be very cool to be able to change the length and intensity of each individual season, so you can basically simulate any temperate climate or just make up your own.

Zhilkin · 2018-03-20T07:46:27.869Z

Intensity? Do you mean weather parameters?

hobophobe · 2018-03-20T15:29:46.554Z

Basically just how hot summers get and how cold winters gets. What are weather parameters?

Zhilkin · 2018-03-20T15:51:41.172Z

Weather parameters:

github.com

CleverRaven/Cataclysm-DDA/blob/39600bc352d4a229a6bcf561bf2a5c13ca0a8998/data/json/regional_map_settings.json#L182-L187


"weather": {
  "base_temperature" : 6.5,
  "base_humidity" : 66.0,
  "base_pressure" : 1015.0,
  "base_acid" : 0.0
}

github.com

CleverRaven/Cataclysm-DDA/blob/0054fb69cf6b82b7ae69749204a58c31bd7011eb/src/weather_gen.h#L19-L25


class weather_generator
{
public:
    double base_temperature = 6.5; // Average temperature of New England
    double base_humidity = 66.0; // Average humidity
    double base_pressure = 1015.0; // Average atmospheric pressure
    double base_acid = 0.0;

github.com

CleverRaven/Cataclysm-DDA/blob/93f2979292e8e0082ea32f6a9720ef51d810b8e8/src/weather_gen.cpp#L190-L198


weather_generator weather_generator::load( JsonObject &jo )
{
weather_generator ret;
ret.base_temperature = jo.get_float( "base_temperature", 6.5 );
ret.base_humidity = jo.get_float( "base_humidity", 66.0 );
ret.base_pressure = jo.get_float( "base_pressure", 1015.0 );
ret.base_acid = jo.get_float( "base_acid", 1015.0 );
return ret;
}

Weather calculation:

github.com

CleverRaven/Cataclysm-DDA/blob/93f2979292e8e0082ea32f6a9720ef51d810b8e8/src/weather_gen.cpp#L21-L86


w_point weather_generator::get_weather( const tripoint &location, const calendar &t,
                                    unsigned seed ) const
{
const double x( location.x /
                2000.0 ); // Integer x position / widening factor of the Perlin function.
const double y( location.y /
                2000.0 ); // Integer y position / widening factor of the Perlin function.
const double z( double( t.get_turn() + to_turns<int>( calendar::season_length() ) ) /
                2000.0 ); // Integer turn / widening factor of the Perlin function.


const double dayFraction = time_past_midnight( t ) / 1_days;


//limit the random seed during noise calculation, a large value flattens the noise generator to zero
//Windows has a rand limit of 32768, other operating systems can have higher limits
const unsigned modSEED = seed % 32768;


// Noise factors
double T( raw_noise_4d( x, y, z, modSEED ) * 4.0 );
double H( raw_noise_4d( x, y, z / 5, modSEED + 101 ) );
double H2( raw_noise_4d( x, y, z, modSEED + 151 ) / 4 );

This file has been truncated. show original

Coolthulhu · 2018-03-21T09:38:35.229Z

In case someone can’t read the above:
Directly setting parameters is not possible because they are used in complex formulas that calculate things in such a way that they are consistent across the map.

Adding some specific settings like temperature amplitude (so that you can have harsh winters and scorching summers) is doable, though.

hobophobe · 2018-03-22T00:51:17.936Z

Coolthulhu:

Adding some specific settings like temperature amplitude (so that you can have harsh winters and scorching summers) is doable, though.

Even this would be great, I think my biggest issue is that winter is a bit too easy, all you need to is a couple layers of very easy to craft or acquire clothing and you’re good to go, actual winter gear doesn’t really seem at all necessary. As a Canadian, I’d appreciate seeing weather so cold you can barely stay outside even in full winter gear.

hobophobe · 2018-03-22T01:21:29.192Z

Is there any way to change season lengths in an ongoing game?

EnDSchultz · 2018-03-23T02:33:17.829Z

If you’re talking about the in game option, I recall that changing it mid game should take effect immediately. It’s measured from the start of the game though, so your day and season will spontaneously change.

hobophobe · 2018-03-23T09:51:59.208Z

Wait… how do you do this? Not from the Settings menu on the main screen, what am I missing?

EnDSchultz · 2018-03-23T23:09:34.211Z

In the newest experimental: Options -> Current World -> Line 17 “Season Length”