C4Weather.cpp

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/*
 * OpenClonk, http://www.openclonk.org
 *
 * Copyright (c) 1998-2000, Matthes Bender
 * Copyright (c) 2001-2009, RedWolf Design GmbH, http://www.clonk.de/
 * Copyright (c) 2009-2016, The OpenClonk Team and contributors
 *
 * Distributed under the terms of the ISC license; see accompanying file
 * "COPYING" for details.
 *
 * "Clonk" is a registered trademark of Matthes Bender, used with permission.
 * See accompanying file "TRADEMARK" for details.
 *
 * To redistribute this file separately, substitute the full license texts
 * for the above references.
 */
 
/* Controls temperature, wind, and natural disasters */
 
#include "C4Include.h"
#include "landscape/C4Weather.h"
 
#include "game/C4GraphicsSystem.h"
#include "graphics/C4Draw.h"
#include "lib/C4Random.h"
#include "object/C4Object.h"
#include "platform/C4SoundSystem.h"
 
C4Weather::C4Weather()
{
    Default();
}
 
C4Weather::~C4Weather()
{
    Clear();
}
 
void C4Weather::Init(bool fScenario)
{
    if (fScenario)
    {
        // Season
        Season=Game.C4S.Weather.StartSeason.Evaluate();
        YearSpeed=Game.C4S.Weather.YearSpeed.Evaluate();
        // Temperature
        Climate=100-Game.C4S.Weather.Climate.Evaluate()-50;
        Temperature=Climate;
        // Wind
        Wind=TargetWind=Game.C4S.Weather.Wind.Evaluate();
        // gamma?
        NoGamma=Game.C4S.Weather.NoGamma;
    }
    // set gamma
    SetSeasonGamma();
}
 
void C4Weather::Execute()
{
    // Season
    if (!::Game.iTick35)
    {
        SeasonDelay+=YearSpeed;
        if (SeasonDelay>=200)
        {
            SeasonDelay=0;
            Season++;
            if (Season>Game.C4S.Weather.StartSeason.Max)
                Season=Game.C4S.Weather.StartSeason.Min;
            SetSeasonGamma();
        }
    }
    // Temperature
    if (!::Game.iTick35)
    {
        int32_t iTemperature = Climate - fixtoi(Cos(itofix(36 * Season, 10)), TemperatureRange);
        if (Temperature<iTemperature) Temperature++;
        else if (Temperature>iTemperature) Temperature--;
    }
    // Wind
    if (!::Game.iTick1000)
        TargetWind=Game.C4S.Weather.Wind.Evaluate();
    if (!::Game.iTick10)
        Wind=Clamp<int32_t>(Wind+Sign(TargetWind-Wind),
                              Game.C4S.Weather.Wind.Min,
                              Game.C4S.Weather.Wind.Max);
}
 
void C4Weather::Clear()
{
 
}
 
int32_t C4Weather::GetWind(int32_t x, int32_t y)
{
    if (Landscape.GetBackPix(x,y) != 0) return 0;
    return Wind;
}
 
int32_t C4Weather::GetTemperature()
{
    return Temperature;
}
 
void C4Weather::Default()
{
    Season=0; YearSpeed=0; SeasonDelay=0;
    Wind=TargetWind=0;
    Temperature=Climate=0;
    TemperatureRange=30;
    NoGamma=true;
}
 
void C4Weather::SetWind(int32_t iWind)
{
    Wind=Clamp<int32_t>(iWind,-100,+100);
    TargetWind=Clamp<int32_t>(iWind,-100,+100);
}
 
void C4Weather::SetTemperature(int32_t iTemperature)
{
    Temperature = Clamp<int32_t>(iTemperature,-100,100);
    SetSeasonGamma();
}
 
void C4Weather::SetSeason(int32_t iSeason)
{
    Season = Clamp<int32_t>(iSeason,0,100);
    SetSeasonGamma();
}
 
int32_t C4Weather::GetSeason()
{
    return Season;
}
 
void C4Weather::SetClimate(int32_t iClimate)
{
    Climate = Clamp<int32_t>(iClimate,-50,+50);
    SetSeasonGamma();
}
 
int32_t C4Weather::GetClimate()
{
    return Climate;
}
 
static float SeasonColors[4][3] =
{
    { 0.90f, 0.90f, 1.00f }, // winter: slightly blue; blued out by temperature
    { 1.00f, 1.05f, 0.90f }, // spring: green to yellow
    { 1.00f, 1.00f, 1.00f }, // summer: regular ramp
    { 1.00f, 0.95f, 0.90f }  // fall:   dark, brown ramp
};
 
void C4Weather::SetSeasonGamma()
{
    if (NoGamma) return;
    // get season num and offset
    int32_t iSeason1=(Season/25)%4; int32_t iSeason2=(iSeason1+1)%4;
    int32_t iSeasonOff1=Clamp(Season%25, 5, 19)-5; int32_t iSeasonOff2=15-iSeasonOff1;
    float gamma[3] = { 0.0f, 0.0f, 0.0f };
    // interpolate between season colors
    for (int32_t iChan=0; iChan<3; iChan+=8)
    {
        float c1 = SeasonColors[iSeason1][iChan],
              c2 = SeasonColors[iSeason2][iChan];
        gamma[iChan] = (c1*iSeasonOff2 + c2*iSeasonOff1) / 15;
    }
    // apply gamma ramp
    pDraw->SetGamma(gamma[0], gamma[1], gamma[2], C4GRI_SEASON);
}
 
void C4Weather::CompileFunc(StdCompiler *pComp)
{
    pComp->Value(mkNamingAdapt(Season,           "Season",                0));
    pComp->Value(mkNamingAdapt(YearSpeed,        "YearSpeed",             0));
    pComp->Value(mkNamingAdapt(SeasonDelay,      "SeasonDelay",           0));
    pComp->Value(mkNamingAdapt(Wind,             "Wind",                  0));
    pComp->Value(mkNamingAdapt(TargetWind,       "TargetWind",            0));
    pComp->Value(mkNamingAdapt(Temperature,      "Temperature",           0));
    pComp->Value(mkNamingAdapt(TemperatureRange, "TemperatureRange",      30));
    pComp->Value(mkNamingAdapt(Climate,          "Climate",               0));
    pComp->Value(mkNamingAdapt(NoGamma,          "NoGamma",               0));
 
    int32_t gamma[C4MaxGammaRamps*3],
            gammaDefaults[C4MaxGammaRamps*3];
    for (int32_t i=0; i<C4MaxGammaRamps; ++i)
    {
        gammaDefaults[i*3+0] = 100;
        gammaDefaults[i*3+1] = 100;
        gammaDefaults[i*3+2] = 100;
        gamma[i*3+0] = int(pDraw->gamma[i][0] * 100.0f);
        gamma[i*3+1] = int(pDraw->gamma[i][1] * 100.0f);
        gamma[i*3+2] = int(pDraw->gamma[i][2] * 100.0f);
    }
    pComp->Value(mkNamingAdapt(mkArrayAdaptM(gamma), "Gamma", gammaDefaults));
    for (int32_t i=0; i<C4MaxGammaRamps; ++i)
    {
        pDraw->gamma[i][0] = float(gamma[i*3+0]) / 100.0f;
        pDraw->gamma[i][1] = float(gamma[i*3+1]) / 100.0f;
        pDraw->gamma[i][2] = float(gamma[i*3+2]) / 100.0f;
    }
}
 
C4Weather Weather;