Jonas Reith
f84e06507a
A per-cell humidity/cloud/rain cycle advanced on the live clock (PlanetWeather.cpp, raylib-free): evaporate over warm sunlit seas -> advect humidity & cloud along the prevailing wind (upwind differencing) -> condense into cloud (saturation vs temperature + windward orographic lift) -> rain out thick cloud -> dissipate. Bounded exp-rate forms keep it stable at any timestep, so it runs cleanly from hours/sec up to a month/sec. initWeather() spins the fields up from the moisture climatology; fully deterministic (no RNG). Render: a translucent cloud shell over the 3D globe (white -> dark slate where it rains, alpha = cover) plus a matching drawWeather2D layer on the 2D map (shared drawMapTris rasterizer), toggled with K (default on). stepSim runs stepWeather each live frame at the sim-hours added to liveTime (held when paused). Cell-info shows cloud/humidity/raining. Saved as v10 (humidity/cloud/rain, flag-gated; pre-v10 saves spin weather up live). New weather* config knobs. Reseed/regen now also drops out of Live World. test_weather.cpp: fields in range, clouds form + rain falls, oceans moister than land, determinism, v10 round-trip; the other four suites still pass; GUI build clean. Docs updated. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
62 lines
1.8 KiB
CMake
62 lines
1.8 KiB
CMake
cmake_minimum_required(VERSION 3.16)
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project(PlanetSim CXX)
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set(CMAKE_CXX_STANDARD 17)
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set(CMAKE_CXX_STANDARD_REQUIRED ON)
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include(FetchContent)
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FetchContent_Declare(
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raylib
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GIT_REPOSITORY https://github.com/raysan5/raylib.git
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GIT_TAG 5.5
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)
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# Build raylib as a static lib, no examples.
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set(BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
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set(BUILD_GAMES OFF CACHE BOOL "" FORCE)
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FetchContent_MakeAvailable(raylib)
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add_executable(planetsim
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src/main.cpp
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# Engine (raylib-free, testable headless) -- src/sim
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src/sim/IcoSphere.cpp
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src/sim/Planet.cpp
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src/sim/PlanetTectonics.cpp
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src/sim/PlanetDrift.cpp
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src/sim/PlanetErosion.cpp
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src/sim/PlanetHydrology.cpp
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src/sim/PlanetBiomes.cpp
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src/sim/PlanetClimate.cpp
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src/sim/PlanetLive.cpp
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src/sim/PlanetOcean.cpp
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src/sim/PlanetWeather.cpp
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src/sim/PlanetBiota.cpp
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src/sim/PlanetFloraGen.cpp
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src/sim/PlanetFaunaGen.cpp
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src/sim/PlanetFungiGen.cpp
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src/sim/PlanetIO.cpp
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# Viewer (raylib) -- src/render
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src/render/Colors.cpp
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src/render/Map2D.cpp
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src/render/Overlays.cpp
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src/render/Picking.cpp
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src/render/Panels.cpp
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src/render/Viewer.cpp
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src/render/ViewerInput.cpp
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src/render/ViewerRender.cpp
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)
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# Flat includes ("Planet.hpp", "Viewer.hpp", ...) resolve across both folders.
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target_include_directories(planetsim PRIVATE src/sim src/render)
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target_link_libraries(planetsim PRIVATE raylib)
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# OpenMP parallelizes the per-cell passes in Planet::step(). Optional: without
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# it the #pragma omp lines are ignored and the sim runs (correctly) serial.
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find_package(OpenMP)
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if(OpenMP_CXX_FOUND)
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target_link_libraries(planetsim PRIVATE OpenMP::OpenMP_CXX)
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endif()
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# Linux system libs raylib needs at link time.
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if(UNIX AND NOT APPLE)
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target_link_libraries(planetsim PRIVATE m pthread dl)
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endif()
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