mirror of
https://github.com/minetest/minetest.git
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129 lines
3.4 KiB
C++
129 lines
3.4 KiB
C++
/*
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Minetest
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Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <fstream>
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#include "environment.h"
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#include "collision.h"
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#include "serverobject.h"
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#include "serverscripting.h"
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#include "server.h"
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#include "daynightratio.h"
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#include "emerge.h"
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Environment::Environment(IGameDef *gamedef):
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m_time_of_day_speed(0),
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m_time_of_day(9000),
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m_time_of_day_f(9000./24000),
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m_time_conversion_skew(0.0f),
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m_enable_day_night_ratio_override(false),
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m_day_night_ratio_override(0.0f),
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m_gamedef(gamedef)
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{
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m_cache_enable_shaders = g_settings->getBool("enable_shaders");
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m_cache_active_block_mgmt_interval = g_settings->getFloat("active_block_mgmt_interval");
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m_cache_abm_interval = g_settings->getFloat("abm_interval");
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m_cache_nodetimer_interval = g_settings->getFloat("nodetimer_interval");
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}
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Environment::~Environment()
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{
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}
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u32 Environment::getDayNightRatio()
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{
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MutexAutoLock lock(this->m_time_lock);
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if (m_enable_day_night_ratio_override)
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return m_day_night_ratio_override;
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return time_to_daynight_ratio(m_time_of_day_f * 24000, m_cache_enable_shaders);
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}
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void Environment::setTimeOfDaySpeed(float speed)
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{
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m_time_of_day_speed = speed;
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}
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void Environment::setDayNightRatioOverride(bool enable, u32 value)
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{
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MutexAutoLock lock(this->m_time_lock);
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m_enable_day_night_ratio_override = enable;
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m_day_night_ratio_override = value;
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}
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void Environment::setTimeOfDay(u32 time)
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{
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MutexAutoLock lock(this->m_time_lock);
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if (m_time_of_day > time)
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m_day_count++;
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m_time_of_day = time;
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m_time_of_day_f = (float)time / 24000.0;
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}
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u32 Environment::getTimeOfDay()
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{
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MutexAutoLock lock(this->m_time_lock);
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return m_time_of_day;
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}
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float Environment::getTimeOfDayF()
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{
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MutexAutoLock lock(this->m_time_lock);
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return m_time_of_day_f;
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}
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void Environment::stepTimeOfDay(float dtime)
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{
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MutexAutoLock lock(this->m_time_lock);
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// Cached in order to prevent the two reads we do to give
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// different results (can be written by code not under the lock)
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f32 cached_time_of_day_speed = m_time_of_day_speed;
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f32 speed = cached_time_of_day_speed * 24000. / (24. * 3600);
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m_time_conversion_skew += dtime;
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u32 units = (u32)(m_time_conversion_skew * speed);
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bool sync_f = false;
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if (units > 0) {
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// Sync at overflow
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if (m_time_of_day + units >= 24000) {
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sync_f = true;
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m_day_count++;
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}
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m_time_of_day = (m_time_of_day + units) % 24000;
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if (sync_f)
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m_time_of_day_f = (float)m_time_of_day / 24000.0;
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}
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if (speed > 0) {
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m_time_conversion_skew -= (f32)units / speed;
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}
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if (!sync_f) {
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m_time_of_day_f += cached_time_of_day_speed / 24 / 3600 * dtime;
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if (m_time_of_day_f > 1.0)
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m_time_of_day_f -= 1.0;
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if (m_time_of_day_f < 0.0)
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m_time_of_day_f += 1.0;
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}
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}
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u32 Environment::getDayCount()
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{
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// Atomic<u32> counter
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return m_day_count;
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}
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