mirror of https://github.com/OpenRCT2/OpenRCT2.git
252 lines
11 KiB
C
252 lines
11 KiB
C
/*****************************************************************************
|
|
* Copyright (c) 2014 Ted John
|
|
* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
|
|
*
|
|
* This file is part of OpenRCT2.
|
|
*
|
|
* OpenRCT2 is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*****************************************************************************/
|
|
|
|
#include "addresses.h"
|
|
#include "climate.h"
|
|
#include "date.h"
|
|
#include "gfx.h"
|
|
#include "rct2.h"
|
|
|
|
typedef struct {
|
|
sint8 base_temperature;
|
|
sint8 distribution_size;
|
|
sint8 distribution[24];
|
|
} rct_weather_transition;
|
|
|
|
int gClimateNextWeather;
|
|
|
|
static int _climateNextTemperature;
|
|
static int _climateNextWeatherEffect;
|
|
static int _climateNextWeatherGloom;
|
|
static int _climateNextRainLevel;
|
|
|
|
static const rct_weather_transition* climate_transitions[4];
|
|
|
|
static void climate_determine_future_weather();
|
|
|
|
int climate_celcius_to_fahrenheit(int celcius)
|
|
{
|
|
return (celcius * 29) / 16 + 32;
|
|
}
|
|
|
|
/**
|
|
* Set climate and determine start weather.
|
|
* rct2: 0x006C45ED
|
|
*/
|
|
void climate_reset(int climate)
|
|
{
|
|
RCT2_GLOBAL(RCT2_ADDRESS_CLIMATE, sint8) = climate;
|
|
climate_determine_future_weather();
|
|
}
|
|
|
|
|
|
/**
|
|
* Weather & climate update iteration.
|
|
* Gradually changes the weather parameters towards their determined next values.
|
|
*
|
|
* rct2: 0x006C46B1
|
|
*/
|
|
void climate_update()
|
|
{
|
|
uint8 screen_flags = RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8);
|
|
sint8 temperature = RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_TEMPERATURE, sint8),
|
|
target_temperature = _climateNextTemperature,
|
|
cur_gloom = RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_WEATHER_GLOOM, sint8),
|
|
next_gloom = _climateNextWeatherGloom,
|
|
cur_rain = RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_RAIN_LEVEL, sint8),
|
|
next_rain = _climateNextRainLevel;
|
|
|
|
|
|
if (screen_flags & (~SCREEN_FLAGS_PLAYING)) // only normal play mode gets climate
|
|
return;
|
|
|
|
if (RCT2_GLOBAL(RCT2_ADDRESS_CLIMATE_UPDATE_TIMER, sint16)) {
|
|
|
|
if (RCT2_GLOBAL(RCT2_ADDRESS_CLIMATE_UPDATE_TIMER, sint16) == 960)
|
|
RCT2_GLOBAL(0x009A9804, uint32) |= 8; // climate dirty flag?
|
|
|
|
RCT2_GLOBAL(RCT2_ADDRESS_CLIMATE_UPDATE_TIMER, sint16)--;
|
|
|
|
} else if (!(RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_TICKS, sint32) & 0x7F)) {
|
|
|
|
if (temperature == target_temperature) {
|
|
if (cur_gloom == next_gloom) {
|
|
RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_WEATHER_EFFECT, sint8) = _climateNextWeatherEffect;
|
|
|
|
if (cur_rain == next_rain) {
|
|
RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_WEATHER, sint8) = gClimateNextWeather;
|
|
climate_determine_future_weather();
|
|
RCT2_GLOBAL(0x009A9804, uint32) |= 8; // climate dirty flag?
|
|
} else {
|
|
if (next_rain == 3) {
|
|
cur_rain = 3;
|
|
} else {
|
|
sint8 next_rain_step = cur_rain + 1;
|
|
if (cur_rain > next_rain)
|
|
next_rain_step = cur_rain - 1;
|
|
RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_RAIN_LEVEL, sint8) = next_rain_step;
|
|
}
|
|
}
|
|
} else {
|
|
sint8 next_gloom_step = cur_gloom + 1;
|
|
if (cur_gloom > next_gloom)
|
|
next_gloom_step = cur_gloom - 1;
|
|
|
|
RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_WEATHER_GLOOM, sint8) = next_gloom_step;
|
|
gfx_invalidate_screen();
|
|
}
|
|
|
|
} else {
|
|
sint8 newtemp = temperature + 1;
|
|
if (temperature > target_temperature)
|
|
newtemp = temperature - 1;
|
|
|
|
RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_TEMPERATURE, sint8) = newtemp;
|
|
RCT2_GLOBAL(0x009A9804, uint32) |= 8; // climate dirty flag?
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Calculates future weather development.
|
|
* RCT2 implements this as discrete probability distributions dependant on month and climate
|
|
* for next_weather. The other weather parameters are then looked up depending only on the
|
|
* next weather.
|
|
*
|
|
* rct2: 0x006C461C
|
|
*/
|
|
static void climate_determine_future_weather()
|
|
{
|
|
sint8 climate = RCT2_GLOBAL(RCT2_ADDRESS_CLIMATE, sint8);
|
|
const rct_weather_transition* climate_table = climate_transitions[climate];
|
|
sint8 month = RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_MONTH_YEAR, sint16) & 7;
|
|
rct_weather_transition transition = climate_table[month];
|
|
|
|
// Generate a random variable with values 0 upto distribution_size-1 and chose weather from the distribution table accordingly
|
|
sint8 next_weather = transition.distribution[ ((rand() & 0xFF) * transition.distribution_size) >> 8 ];
|
|
gClimateNextWeather = next_weather;
|
|
|
|
_climateNextTemperature = transition.base_temperature + climate_weather_data[next_weather].temp_delta;
|
|
_climateNextWeatherEffect = climate_weather_data[next_weather].effect_level;
|
|
_climateNextWeatherGloom = climate_weather_data[next_weather].gloom_level;
|
|
_climateNextRainLevel = climate_weather_data[next_weather].rain_level;
|
|
|
|
RCT2_GLOBAL(RCT2_ADDRESS_CLIMATE_UPDATE_TIMER, sint16) = 1920;
|
|
}
|
|
|
|
|
|
|
|
#pragma region Climate / Weather data tables
|
|
|
|
// rct2: 0x00993C94
|
|
// There is actually a sprite at 0x5A9C for snow but only these weather types seem to be fully implemented
|
|
const rct_weather climate_weather_data[6] = {
|
|
{ .temp_delta = 10, .effect_level = 0, .gloom_level = 0, .rain_level = 0, .sprite_id = 0x5A96 }, // Sunny
|
|
{ .temp_delta = 5, .effect_level = 0, .gloom_level = 0, .rain_level = 0, .sprite_id = 0x5A97 }, // Partially Cloudy
|
|
{ .temp_delta = 0, .effect_level = 0, .gloom_level = 0, .rain_level = 0, .sprite_id = 0x5A98 }, // Cloudy
|
|
{ .temp_delta = -2, .effect_level = 1, .gloom_level = 1, .rain_level = 1, .sprite_id = 0x5A99 }, // Rain
|
|
{ .temp_delta = -4, .effect_level = 1, .gloom_level = 2, .rain_level = 2, .sprite_id = 0x5A9A }, // Heavy Rain
|
|
{ .temp_delta = 2, .effect_level = 2, .gloom_level = 2, .rain_level = 2, .sprite_id = 0x5A9B }, // Thunderstorm
|
|
};
|
|
|
|
|
|
// rct2: 00993998
|
|
static const rct_weather_transition climate_cool_and_wet_transitions[] = {
|
|
{ .base_temperature = 8, .distribution_size = 18,
|
|
.distribution = { 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 10, .distribution_size = 21,
|
|
.distribution = { 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 0, 0 } },
|
|
{ .base_temperature = 14, .distribution_size = 17,
|
|
.distribution = { 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 4, 0, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 17, .distribution_size = 17,
|
|
.distribution = { 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 0, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 19, .distribution_size = 23,
|
|
.distribution = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 4 } },
|
|
{ .base_temperature = 20, .distribution_size = 23,
|
|
.distribution = { 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 4, 4, 4, 5 } },
|
|
{ .base_temperature = 16, .distribution_size = 19,
|
|
.distribution = { 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 4, 4, 5, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 13, .distribution_size = 16,
|
|
.distribution = { 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0 } }
|
|
};
|
|
static const rct_weather_transition climate_warm_transitions[] = {
|
|
{ .base_temperature = 12, .distribution_size = 21,
|
|
.distribution = { 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 4, 0, 0 } },
|
|
{ .base_temperature = 13, .distribution_size = 22,
|
|
.distribution = { 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 5, 0 } },
|
|
{ .base_temperature = 16, .distribution_size = 17,
|
|
.distribution = { 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 0, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 19, .distribution_size = 18,
|
|
.distribution = { 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 21, .distribution_size = 22,
|
|
.distribution = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 0 } },
|
|
{ .base_temperature = 22, .distribution_size = 17,
|
|
.distribution = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 5, 0, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 19, .distribution_size = 17,
|
|
.distribution = { 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 0, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 16, .distribution_size = 17,
|
|
.distribution = { 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 4, 0, 0, 0, 0, 0, 0 } }
|
|
};
|
|
static const rct_weather_transition climate_hot_and_dry_transitions[] = {
|
|
{ .base_temperature = 12, .distribution_size = 15,
|
|
.distribution = { 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 14, .distribution_size = 12,
|
|
.distribution = { 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 16, .distribution_size = 11,
|
|
.distribution = { 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 19, .distribution_size = 9,
|
|
.distribution = { 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 21, .distribution_size = 13,
|
|
.distribution = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 22, .distribution_size = 11,
|
|
.distribution = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 21, .distribution_size = 12,
|
|
.distribution = { 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 2, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 16, .distribution_size = 13,
|
|
.distribution = { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }
|
|
};
|
|
static const rct_weather_transition climate_cold_transitions[] = {
|
|
{ .base_temperature = 4, .distribution_size = 18,
|
|
.distribution = { 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 3, 4, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 5, .distribution_size = 21,
|
|
.distribution = { 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 4, 5, 0, 0 } },
|
|
{ .base_temperature = 7, .distribution_size = 17,
|
|
.distribution = { 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 4, 0, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 9, .distribution_size = 17,
|
|
.distribution = { 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 0, 0, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 10, .distribution_size = 23,
|
|
.distribution = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 4 } },
|
|
{ .base_temperature = 11, .distribution_size = 23,
|
|
.distribution = { 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 4, 5 } },
|
|
{ .base_temperature = 9, .distribution_size = 19,
|
|
.distribution = { 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 4, 5, 0, 0, 0, 0 } },
|
|
{ .base_temperature = 6, .distribution_size = 16,
|
|
.distribution = { 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0 } }
|
|
};
|
|
|
|
static const rct_weather_transition* climate_transitions[] = {
|
|
climate_cool_and_wet_transitions,
|
|
climate_warm_transitions,
|
|
climate_hot_and_dry_transitions,
|
|
climate_cold_transitions
|
|
};
|
|
|
|
#pragma endregion |