CMakeLists.txt

cmake_minimum_required(VERSION 3.0.0)
project(FLUID-SIM VERSION 0.1.0 LANGUAGES CXX CUDA)  # Enable CUDA as a language

# Select C++17 with required standards and disable compiler-specific extensions
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

# Options for building GLFW as a library
set(GLFW_BUILD_DOCS OFF CACHE BOOL "" FORCE)
set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
set(GLFW_INSTALL OFF CACHE BOOL "" FORCE)
set(GLFW_USE_HYBRID_HPG ON CACHE BOOL "" FORCE)
add_subdirectory(external/glfw)

# OpenGL and CUDA dependencies
find_package(OpenGL REQUIRED)
find_package(CUDA REQUIRED)

# GLAD source files
set(GLAD_SOURCE external/glad/src/gl.c)

# Dear ImGui source files
set(IMGUI_SOURCES
    external/imgui/imgui.cpp
    external/imgui/imgui_demo.cpp
    external/imgui/imgui_draw.cpp
    external/imgui/imgui_widgets.cpp
    external/imgui/imgui_impl/imgui_impl_glfw.cpp
    external/imgui/imgui_impl/imgui_impl_opengl3.cpp
)

# CUDA source files (replace with actual CUDA source files if needed)
set(CUDA_SOURCES
    # src/cuda/kernel.cu  # Example CUDA source file
    src/cuda/test.cu
    src/cuda/test.cuh
    src/cuda/utility.cu
    src/cuda/utility.cuh
    src/cuda/fluid/marching-cubes.cu
    src/cuda/fluid/marching-cubes.cuh
    src/cuda/fluid/marching-cubes-tables.cuh
    src/cuda/fluid/sph.cuh
    src/cuda/fluid/sph.cu
)

# Combine all external source files together
set(EXTERNAL_SOURCES ${GLAD_SOURCE} ${IMGUI_SOURCES})

# Common sources
set(COMMON_SOURCES
    src/common/application.hpp
    src/common/application.cpp
    src/common/input/keyboard.hpp
    src/common/input/mouse.hpp
    src/common/asset-loader.cpp
    src/common/asset-loader.hpp
    src/common/deserialize-utils.hpp
    src/common/shader/shader.hpp
    src/common/shader/shader.cpp
    src/common/mesh/vertex.hpp
    src/common/mesh/mesh.hpp
    src/common/mesh/mesh-utils.hpp
    src/common/mesh/mesh-utils.cpp
    src/common/texture/sampler.hpp
    src/common/texture/sampler.cpp
    src/common/texture/texture2d.hpp
    src/common/texture/texture-utils.hpp
    src/common/texture/texture-utils.cpp
    src/common/material/pipeline-state.hpp
    src/common/material/pipeline-state.cpp
    src/common/material/material.hpp
    src/common/material/material.cpp
    src/common/ecs/component.hpp
    src/common/ecs/transform.hpp
    src/common/ecs/transform.cpp
    src/common/ecs/entity.hpp
    src/common/ecs/entity.cpp
    src/common/ecs/world.hpp
    src/common/ecs/world.cpp
    src/common/components/camera.hpp
    src/common/components/camera.cpp
    src/common/components/lighting.hpp
    src/common/components/lighting.cpp
    src/common/components/mesh-renderer.hpp
    src/common/components/mesh-renderer.cpp
    src/common/components/free-camera-controller.hpp
    src/common/components/free-camera-controller.cpp
    src/common/components/movement.hpp
    src/common/components/movement.cpp
    src/common/components/component-deserializer.hpp
    src/common/systems/forward-renderer.hpp
    src/common/systems/forward-renderer.cpp
    src/common/fluid/tuner.hpp
    src/common/fluid/tuner.cpp
    src/common/fluid/params.hpp
    src/common/fluid/particle.hpp
    src/common/fluid/particle.cpp
    src/common/fluid/params.cpp
    src/common/fluid/sphere.cpp
    src/common/fluid/sphere.hpp
    src/common/fluid/marching-cubes-grid.hpp
    src/common/fluid/marching-cubes-grid.cpp
    src/common/systems/free-camera-controller.hpp
    src/common/systems/movement.hpp
)

# Include directories
include_directories(
    src/common
    external/glfw/include
    external/glad/include
    external/glm
    external/imgui
    external/utils
    ${CUDA_INCLUDE_DIRS}
)

# Set runtime output directory
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/bin)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG ${PROJECT_SOURCE_DIR}/bin)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE ${PROJECT_SOURCE_DIR}/bin)

set(SCENES_SOURCES
        src/scenes/sim-scene.hpp
)

find_package(Thrust REQUIRED CONFIG)
thrust_create_target(Thrust)

add_definitions(-DBENCH_KERNELS)

# Define executable with CUDA support
add_executable(AQUA_SIM src/main.cpp ${SCENES_SOURCES} ${COMMON_SOURCES} ${EXTERNAL_SOURCES} ${CUDA_SOURCES})
target_compile_options(AQUA_SIM PRIVATE $<$<COMPILE_LANGUAGE:CUDA>:-w>)
# Apply -O2 only in Release, using the correct flag per compiler
target_compile_options(AQUA_SIM
PRIVATE
    $<$<AND:$<CXX_COMPILER_ID:MSVC>,$<CONFIG:Release>>:/O2>
    $<$<AND:$<NOT:$<CXX_COMPILER_ID:MSVC>>,$<CONFIG:Release>>:-O2>
)
# Link libraries (GLFW, OpenGL, CUDA)
target_link_libraries(AQUA_SIM glfw OpenGL::GL ${CUDA_LIBRARIES} Thrust)
set_property(TARGET AQUA_SIM PROPERTY CUDA_SEPARABLE_COMPILATION ON)