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Diffstat (limited to 'Stars45/Weather.cpp')
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1 files changed, 202 insertions, 0 deletions
diff --git a/Stars45/Weather.cpp b/Stars45/Weather.cpp new file mode 100644 index 0000000..56b7847 --- /dev/null +++ b/Stars45/Weather.cpp @@ -0,0 +1,202 @@ +/* Starshatter OpenSource Distribution + Copyright (c) 1997-2004, Destroyer Studios LLC. + All Rights Reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, + this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + * Neither the name "Destroyer Studios" nor the names of its contributors + may be used to endorse or promote products derived from this software + without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + POSSIBILITY OF SUCH DAMAGE. + + SUBSYSTEM: Stars.exe + FILE: Weather.cpp + AUTHOR: John DiCamillo + + + OVERVIEW + ======== + Manages local weather conditions according to the system stardate +*/ + +#include "MemDebug.h" +#include "Weather.h" +#include "StarSystem.h" +#include "Game.h" + +// +--------------------------------------------------------------------+ + +Weather::Weather() +{ + state = CLEAR; + period = 7 * 20 * 3600; + ceiling = 0; + visibility = 1; + + for (int i = 0; i < NUM_STATES; i++) + chances[i] = 0; + + chances[0] = 1; +} + +// +--------------------------------------------------------------------+ + +Weather::~Weather() +{ } + +// +--------------------------------------------------------------------+ + +void +Weather::SetChance(int n, double c) +{ + if (n >= 0 && n < NUM_STATES) { + if (c > 1 && c <= 100) + chances[n] = c / 100; + + else if (c < 1) + chances[n] = c; + } +} + +void +Weather::NormalizeChances() +{ + double total = 0; + + for (int i = 1; i < NUM_STATES; i++) + total += chances[i]; + + if (total <= 1) { + chances[0] = 1 - total; + } + + else { + chances[0] = 0; + + for (int i = 1; i < NUM_STATES; i++) + chances[i] /= total; + } + + int index = 0; + double level = 0; + + for (int i = 0; i < NUM_STATES; i++) { + if (chances[i] > 0) { + level += chances[i]; + + active_states[index] = (STATE) i; + thresholds[index] = level; + + index++; + } + } + + while (index < NUM_STATES) + thresholds[index++] = 10; +} + +// +--------------------------------------------------------------------+ + +void +Weather::Update() +{ + NormalizeChances(); + + double weather = (sin(StarSystem::Stardate() * 2 * PI / period)+1)/2; + + state = active_states[0]; + + for (int i = 1; i < NUM_STATES; i++) { + if (weather > thresholds[i-1] && weather <= thresholds[i]) { + state = active_states[i]; + break; + } + } + + switch (state) { + default: + case CLEAR: + ceiling = 0; + visibility = 1.0; + break; + + case HIGH_CLOUDS: + ceiling = 0; + visibility = 0.9; + break; + + case MODERATE_CLOUDS: + ceiling = 0; + visibility = 0.8; + break; + + case OVERCAST: + ceiling = 6000; + visibility = 0.7; + break; + + case FOG: + ceiling = 3500; + visibility = 0.6; + break; + + case STORM: + ceiling = 7500; + visibility = 0.5; + break; + } +} + +// +--------------------------------------------------------------------+ + +Text +Weather::Description() const +{ + Text description; + + switch (state) { + default: + case CLEAR: + description = Game::GetText("weather.clear"); + break; + + case HIGH_CLOUDS: + description = Game::GetText("weather.high-clouds"); + break; + + case MODERATE_CLOUDS: + description = Game::GetText("weather.partly-cloudy"); + break; + + case OVERCAST: + description = Game::GetText("weather.overcast"); + break; + + case FOG: + description = Game::GetText("weather.fog"); + break; + + case STORM: + description = Game::GetText("weather.storm"); + break; + } + + return description; +}
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