diff options
Diffstat (limited to 'raytracing')
| -rw-r--r-- | raytracing/.clang-format | 23 | ||||
| -rw-r--r-- | raytracing/.clang-tidy | 9 | ||||
| -rw-r--r-- | raytracing/.gitignore | 269 | ||||
| -rw-r--r-- | raytracing/CMakeLists.txt | 39 | ||||
| -rw-r--r-- | raytracing/LICENSE | 674 | ||||
| -rw-r--r-- | raytracing/README.md | 44 | ||||
| -rw-r--r-- | raytracing/apps/CMakeLists.txt | 3 | ||||
| -rw-r--r-- | raytracing/apps/main.cc | 95 | ||||
| -rw-r--r-- | raytracing/etc/build_type.cmake | 11 | ||||
| -rw-r--r-- | raytracing/etc/ccache.cmake | 5 | ||||
| -rw-r--r-- | raytracing/etc/cflags.cmake | 16 | ||||
| -rw-r--r-- | raytracing/etc/lto.cmake | 8 | ||||
| -rw-r--r-- | raytracing/etc/scanners.cmake | 52 | ||||
| -rwxr-xr-x | raytracing/scripts/make-parallel.sh | 2 | ||||
| -rw-r--r-- | raytracing/src/CMakeLists.txt | 9 | ||||
| -rw-r--r-- | raytracing/src/color.cc | 32 | ||||
| -rw-r--r-- | raytracing/src/color.h | 28 | ||||
| -rw-r--r-- | raytracing/src/ray.cc | 16 | ||||
| -rw-r--r-- | raytracing/src/ray.h | 22 | ||||
| -rw-r--r-- | raytracing/src/vec3.cc | 76 | ||||
| -rw-r--r-- | raytracing/src/vec3.h | 102 |
21 files changed, 1535 insertions, 0 deletions
diff --git a/raytracing/.clang-format b/raytracing/.clang-format new file mode 100644 index 0000000..c49e66b --- /dev/null +++ b/raytracing/.clang-format @@ -0,0 +1,23 @@ +--- +Language: Cpp +BasedOnStyle: Mozilla +ColumnLimit: 116 +SpacesInParentheses: true +AlwaysBreakAfterReturnType: None +AlwaysBreakAfterDefinitionReturnType: None +SpaceBeforeCpp11BracedList: true +BreakBeforeBinaryOperators: All +Cpp11BracedListStyle: true +AllowShortBlocksOnASingleLine: Always +BreakBeforeBraces: Custom +BraceWrapping: + AfterClass: true + AfterControlStatement: Never + AfterFunction: true + AfterStruct: true + AfterEnum: true + SplitEmptyFunction: false + SplitEmptyRecord: false + SplitEmptyNamespace: false +PackConstructorInitializers: NextLine +... diff --git a/raytracing/.clang-tidy b/raytracing/.clang-tidy new file mode 100644 index 0000000..c1d3e9f --- /dev/null +++ b/raytracing/.clang-tidy @@ -0,0 +1,9 @@ +Checks: + '*,-altera-*,-llvmlibc-*,-google-build-using-namespace,-modernize-use-trailing-return-type,-readability-implicit-bool-conversion,-*-non-private-member-variables-in-classes,-modernize-use-nodiscard,-*-magic-numbers,-readability-identifier-length,-concurrency-mt-unsafe,-llvm-header-guard,-fuchsia-default-arguments-calls,-fuchsia-default-arguments-declarations,-fuchsia-overloaded-operator,-android-cloexec-accept,-cppcoreguidelines-pro-type-vararg,-hicpp-vararg,-hicpp-signed-bitwise,-misc-include-cleaner,-readability-redundant-member-init,-boost-use-ranges,-portability-template-virtual-member-function' + +WarningsAsErrors: + '*' + +CheckOptions: + hicpp-special-member-functions.AllowSoleDefaultDtor: true + cppcoreguidelines-special-member-functions.AllowSoleDefaultDtor: true diff --git a/raytracing/.gitignore b/raytracing/.gitignore new file mode 100644 index 0000000..06d9da1 --- /dev/null +++ b/raytracing/.gitignore @@ -0,0 +1,269 @@ + +macOS + +.DS_Store +.AppleDouble +.LSOverride +Icon +._* +.DocumentRevisions-V100 +.fseventsd +.Spotlight-V100 +.TemporaryItems +.Trashes +.VolumeIcon.icns +.com.apple.timemachine.donotpresent + +Windows + +Thumbs.db +Thumbs.db:encryptable +ehthumbs.db +ehthumbs_vista.db +*.cab +*.msi +*.msm +*.msp +*.lnk +desktop.ini + +Linux + +~ +.fuse_hidden +.directory +.Trash-* +.nfs* + +Visual Studio Code + +.vscode/* +# !.vscode/settings.json +# !.vscode/tasks.json +# !.vscode/launch.json +# !.vscode/extensions.json +*.code-workspace +.history/ + +IntelliJ IDEA / WebStorm / PyCharm / PhpStorm (JetBrains) + +.idea/ +*.iml +*.iws +out/ + +Eclipse + +.apt_generated +.classpath +.factorypath +.project +.settings +.springBeans +.sts4-cache +bin/ + +Vim / Emacs + +*.swp +*.swo +~ +## +/.emacs.desktop +/.emacs.desktop.lock +.elc +auto-save-list +tramp +.# + + +.env +.env.local +.env.development.local +.env.test.local +.env.production.local +*.pem +*.key +*.cert +*.cer +*.crt +id_rsa +id_rsa.pub +secrets.yml +auth.json + + +.log +npm-debug.log +yarn-debug.log* +yarn-error.log* +pnpm-debug.log* +lerna-debug.log* +*.sqlite +*.sqlite3 +*.db +*.sql + +Node.js + +node_modules/ +jspm_packages/ +typings/ +.npm +.eslintcache +.stylelintcache +.node_repl_history + + +dist/ +build/ +.next/ +.nuxt/ +.vuepress/dist +.serverless/ +.cache/ + + +coverage/ +.nyc_output/ + +Python + +pycache/ +*.py[cod] +*$py.class +*.so + + + +venv/ +env/ +.env/ +.venv/ +ENV/ +env.bak/ + + + +*.egg +*.egg-info/ +dist/ +build/ +eggs/ +parts/ +var/ +sdist/ +develop-eggs/ +.installed.cfg + + + +.pytest_cache/ +.mypy_cache/ +.tox/ +htmlcov/ + +Java / Maven / Gradle + +*.class +*.log +*.ctxt +.mtj.tmp/ +*.jar +*.war +*.nar +*.ear +*.zip +*.tar.gz +*.rar + +target/ +build/ +!gradle-wrapper.jar +.gradle/ + +C / C++ + + +*.o +*.ko +*.obj +*.elf + + +*.ilk +*.map +*.exp +*.gch +*.pch +*.lib +*.a +*.la +*.lo +*.dll +*.so +.so. +*.dylib + + +*.exe +*.out +*.app +.i86 +*.x86_64 +*.hex + +CMake / Make + +CMakeCache.txt +CMakeFiles/ +CMakeScripts/ +Makefile.cmake +cmake_install.cmake +install_manifest.txt +compile_commands.json + + +Go + +*.test +*.out + +vendor/ + +go.work + +Rust + +target/ + +Cargo.lock + +**/*.rs.bk + +PHP / Composer + +vendor/ +.phpunit.result.cache + +Ruby + +.gem +/.bundle/ +/vendor/bundle +/log/ +/tmp/* +/db/.sqlite3 +/db/.sqlite3-journal +/public/system +/coverage/ +/spec/tmp + + +杂项 + +.sass-cache/ +.jekyll-metadata +*.bak +*.tmp +*.temp
\ No newline at end of file diff --git a/raytracing/CMakeLists.txt b/raytracing/CMakeLists.txt new file mode 100644 index 0000000..c001585 --- /dev/null +++ b/raytracing/CMakeLists.txt @@ -0,0 +1,39 @@ +cmake_minimum_required(VERSION 3.24.2) + +project(RayTracer LANGUAGES CXX) + +set(CMAKE_CXX_STANDARD_REQUIRED True) + +if(${CMAKE_GENERATOR} STREQUAL "Unix Makefiles") + set(CMAKE_MAKE_PROGRAM "${PROJECT_SOURCE_DIR}/scripts/make-parallel.sh" CACHE STRING "" FORCE) +endif() + +if(${PROJECT_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR}) + message(FATAL_ERROR "RayTracer must be built outside its source directory, e.g. `cmake -B build`.") +endif() + +# Default is set to Release if not specified +include(${PROJECT_SOURCE_DIR}/etc/build_type.cmake) + +# Enable LTO +include(${PROJECT_SOURCE_DIR}/etc/lto.cmake) + +# Enable ccache +include(${PROJECT_SOURCE_DIR}/etc/ccache.cmake) + + +# strict compile warnings +include(${PROJECT_SOURCE_DIR}/etc/cflags.cmake) + +# clang-format clang-tidy + +include(${PROJECT_SOURCE_DIR}/etc/scanners.cmake) + +# ctest +# include(${PROJECT_SOURCE_DIR}/etc/ctest.cmake) + +# License +install(FILES LICENSE DESTINATION .) + +add_subdirectory("${PROJECT_SOURCE_DIR}/src") +add_subdirectory("${PROJECT_SOURCE_DIR}/apps")
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"Knowingly relying" means you have +actual knowledge that, but for the patent license, your conveying the +covered work in a country, or your recipient's use of the covered work +in a country, would infringe one or more identifiable patents in that +country that you have reason to believe are valid. + + If, pursuant to or in connection with a single transaction or +arrangement, you convey, or propagate by procuring conveyance of, a +covered work, and grant a patent license to some of the parties +receiving the covered work authorizing them to use, propagate, modify +or convey a specific copy of the covered work, then the patent license +you grant is automatically extended to all recipients of the covered +work and works based on it. + + A patent license is "discriminatory" if it does not include within +the scope of its coverage, prohibits the exercise of, or is +conditioned on the non-exercise of one or more of the rights that are +specifically granted under this License. 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No Surrender of Others' Freedom. + + If conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot convey a +covered work so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you may +not convey it at all. For example, if you agree to terms that obligate you +to collect a royalty for further conveying from those to whom you convey +the Program, the only way you could satisfy both those terms and this +License would be to refrain entirely from conveying the Program. + + 13. Use with the GNU Affero General Public License. + + Notwithstanding any other provision of this License, you have +permission to link or combine any covered work with a work licensed +under version 3 of the GNU Affero General Public License into a single +combined work, and to convey the resulting work. The terms of this +License will continue to apply to the part which is the covered work, +but the special requirements of the GNU Affero General Public License, +section 13, concerning interaction through a network will apply to the +combination as such. + + 14. Revised Versions of this License. + + The Free Software Foundation may publish revised and/or new versions of +the GNU General Public License from time to time. Such new versions will +be similar in spirit to the present version, but may differ in detail to +address new problems or concerns. + + Each version is given a distinguishing version number. If the +Program specifies that a certain numbered version of the GNU General +Public License "or any later version" applies to it, you have the +option of following the terms and conditions either of that numbered +version or of any later version published by the Free Software +Foundation. If the Program does not specify a version number of the +GNU General Public License, you may choose any version ever published +by the Free Software Foundation. + + If the Program specifies that a proxy can decide which future +versions of the GNU General Public License can be used, that proxy's +public statement of acceptance of a version permanently authorizes you +to choose that version for the Program. + + Later license versions may give you additional or different +permissions. However, no additional obligations are imposed on any +author or copyright holder as a result of your choosing to follow a +later version. + + 15. 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Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + This program 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 <https://www.gnu.org/licenses/>. + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + <program> Copyright (C) <year> <name of author> + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +<https://www.gnu.org/licenses/>. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +<https://www.gnu.org/licenses/why-not-lgpl.html>. diff --git a/raytracing/README.md b/raytracing/README.md new file mode 100644 index 0000000..71f3ff5 --- /dev/null +++ b/raytracing/README.md @@ -0,0 +1,44 @@ +# Ray Tracer + +Inspired by the book _Ray Tracing in One Weekend_, I'd like to write this project using modern C++ (C++ 23) and attempt to use high-performance approaches. + +## Build & Run + +Make Sure your build system is properly set up: +```bash +cmake -S . -B build +``` + +Configure for Release: +```bash +# Release mode +cmake -B build -DCMAKE_BUILD_TYPE=Release +#Debug mode +cmake -B build -DCMAKE_BUILD_TYPE=Debug +``` + +Compile the source code: +```bash +cmake --build build +``` + +To normalize the coding style +```bash +cmake --build build --target format +``` + +Suggests improvements to follow good C++ programming practices: +```bash +cmake --build build --target tidy +cmake --build build --target tidy-all +``` + +Run the program +```bash +./build/apps/RayTracer > images/image.ppm +display images/image.ppm +``` + +## License +This project is licensed under the **GNU General Public License v3.0**. +See the [LICENSE](LICENSE) file for the full text.
\ No newline at end of file diff --git a/raytracing/apps/CMakeLists.txt b/raytracing/apps/CMakeLists.txt new file mode 100644 index 0000000..af2d213 --- /dev/null +++ b/raytracing/apps/CMakeLists.txt @@ -0,0 +1,3 @@ +add_executable(RayTracer main.cc) + +target_link_libraries(RayTracer PRIVATE RayTracerCore)
\ No newline at end of file diff --git a/raytracing/apps/main.cc b/raytracing/apps/main.cc new file mode 100644 index 0000000..2a73d94 --- /dev/null +++ b/raytracing/apps/main.cc @@ -0,0 +1,95 @@ +/* + * Copyright (C) 2026 Richard + * + * This program 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 <https://www.gnu.org/licenses/>. + */ +#include "color.h" +#include "ray.h" +#include "vec3.h" + +#include <iostream> + +double hit_sphere( const point3& center, double radius, const ray& r ) +{ + vec3 oc = center - r.origin(); + auto a = dot( r.direction(), r.direction() ); + auto b = -2.0 * dot( r.direction(), oc ); + auto c = dot( oc, oc ) - radius * radius; + auto discriminant = b * b - 4 * a * c; + + if ( discriminant < 0 ) { + return -1.0; + } else { + return ( -b - std::sqrt( discriminant ) ) / ( 2.0 * a ); + } +} + +color ray_color( const ray& r ) +{ + auto t = hit_sphere( point3( 0, 0, -1 ), 0.5, r ); + if ( t > 0.0 ) { + vec3 N = unit_vector( r.at( t ) - vec3( 0, 0, -1 ) ); + return 0.5 * color( N.x() + 1, N.y() + 1, N.z() + 1 ); + } + + vec3 unit_direction = unit_vector( r.direction() ); + auto a = 0.5 * ( unit_direction.y() + 1.0 ); + return ( 1.0 - a ) * color( 1.0, 1.0, 1.0 ) + a * color( 0.5, 0.7, 1.0 ); +} + +int main() +{ + // Image + + auto aspect_ratio = 16.0 / 9.0; + const int image_width = 400; + // Calculate the image height, and ensure that it's at least 1. + int image_height = static_cast<int>( image_width / aspect_ratio ); + image_height = ( image_height < 1 ) ? 1 : image_height; + + // Camera + auto focal_length = 1.0; + auto viewport_height = 2.0; + auto viewport_width = viewport_height * ( double( image_width ) / image_height ); + auto camera_center = point3( 0, 0, 0 ); + + // Calculate the vectors across the horizontal and down the vertical viewport edges. + auto viewport_u = vec3( viewport_width, 0, 0 ); + auto viewport_v = vec3( 0, -viewport_height, 0 ); + + // Calculate the horizontal and vertical delta vectors from pixel to pixel. + auto pixel_delta_u = viewport_u / image_width; + auto pixel_delta_v = viewport_v / image_height; + + // Calculate the location of the upper left pixel. + auto viewport_upper_left = camera_center - vec3( 0, 0, focal_length ) - viewport_u / 2 - viewport_v / 2; + auto pixel00_loc = viewport_upper_left + 0.5 * ( pixel_delta_u + pixel_delta_v ); + + // Render + + std::cout << "P3\n" << image_width << " " << image_height << "\n255\n"; + for ( int j = 0; j < image_height; j++ ) { + std::clog << "\rScanlines remaining: " << ( image_height - j ) << ' ' << std::flush; + for ( int i = 0; i < image_width; i++ ) { + auto pixel_center = pixel00_loc + ( i * pixel_delta_u ) + ( j * pixel_delta_v ); + auto ray_direction = pixel_center - camera_center; + ray r( camera_center, ray_direction ); + + const color pixel_color = ray_color( r ); + write_color( std::cout, pixel_color ); + } + } + std::clog << "\rDone. \n"; + return 0; +}
\ No newline at end of file diff --git a/raytracing/etc/build_type.cmake b/raytracing/etc/build_type.cmake new file mode 100644 index 0000000..69d019f --- /dev/null +++ b/raytracing/etc/build_type.cmake @@ -0,0 +1,11 @@ +set(default_build_type "Debug") + +if (NOT (CMAKE_BUILD_TYPE_SHADOW STREQUAL CMAKE_BUILD_TYPE)) + if (NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES) + message (STATUS "Setting build type to '${default_build_type}'") + set (CMAKE_BUILD_TYPE "${default_build_type}" CACHE STRING "Choose the type of build." FORCE) + endif () + set (CMAKE_BUILD_TYPE_SHADOW ${CMAKE_BUILD_TYPE} CACHE STRING "used to detect changes in build type" FORCE) +endif () + +message (STATUS "Building in '${CMAKE_BUILD_TYPE}' mode.") diff --git a/raytracing/etc/ccache.cmake b/raytracing/etc/ccache.cmake new file mode 100644 index 0000000..aeceb8e --- /dev/null +++ b/raytracing/etc/ccache.cmake @@ -0,0 +1,5 @@ +find_program(CCACHE_PROGRAM ccache) +if(CCACHE_PROGRAM) + set(CMAKE_CXX_COMPILER_LAUNCHER "${CCACHE_PROGRAM}") + message(STATUS "Found ccache: ${CCACHE_PROGRAM} - Compilation will be cached.") +endif()
\ No newline at end of file diff --git a/raytracing/etc/cflags.cmake b/raytracing/etc/cflags.cmake new file mode 100644 index 0000000..ac08601 --- /dev/null +++ b/raytracing/etc/cflags.cmake @@ -0,0 +1,16 @@ +set (CMAKE_CXX_STANDARD 23) +set (CMAKE_EXPORT_COMPILE_COMMANDS ON) + +set(SANITIZING_FLAGS -fno-sanitize-recover=all -fsanitize=undefined -fsanitize=address) + +# ask for more warnings from the compiler +set (CMAKE_BASE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") +set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wpedantic -Wextra -Weffc++ -Werror -Wshadow -Wpointer-arith -Wcast-qual -Wformat=2 -Wno-unqualified-std-cast-call -Wno-non-virtual-dtor") + +# Sanitizers +if(CMAKE_BUILD_TYPE STREQUAL "Debug") + message(STATUS "Enabling Address and Undefined Behavior Sanitizers") + set(SANITIZING_FLAGS "-fno-sanitize-recover=all -fsanitize=address -fsanitize=undefined -fno-omit-frame-pointer") + set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${SANITIZING_FLAGS} -g -O0") + set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} ${SANITIZING_FLAGS}") +endif()
\ No newline at end of file diff --git a/raytracing/etc/lto.cmake b/raytracing/etc/lto.cmake new file mode 100644 index 0000000..517ec14 --- /dev/null +++ b/raytracing/etc/lto.cmake @@ -0,0 +1,8 @@ +include(CheckIPOSupported) +check_ipo_supported(RESULT ipo_supported OUTPUT error) +if(ipo_supported) + message(STATUS "IPO / LTO supported and enabled.") + set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE) +else() + message(STATUS "IPO / LTO not supported: <${error}>") +endif()
\ No newline at end of file diff --git a/raytracing/etc/scanners.cmake b/raytracing/etc/scanners.cmake new file mode 100644 index 0000000..0a86f19 --- /dev/null +++ b/raytracing/etc/scanners.cmake @@ -0,0 +1,52 @@ +# file (GLOB_RECURSE RayTracer_CC_FILES ${CMAKE_SOURCE_DIR}/src/*.cc) + +# file (GLOB_RECURSE ALL_SRC_FILES *.hh *.cc) + +# add_custom_target (format "clang-format" -i ${ALL_SRC_FILES} COMMENT "Formatting source code...") + + +find_program(CLANG_FORMAT_EXE clang-format) +if(CLANG_FORMAT_EXE) + file(GLOB_RECURSE ALL_FMT_FILES + "${CMAKE_SOURCE_DIR}/src/*.cc" + "${CMAKE_SOURCE_DIR}/src/*.cpp" + "${CMAKE_SOURCE_DIR}/src/*.h" + "${CMAKE_SOURCE_DIR}/src/*.hpp" + "${CMAKE_SOURCE_DIR}/apps/*.cc" + "${CMAKE_SOURCE_DIR}/apps/*.cpp" + ) + + add_custom_target(format + COMMAND ${CLANG_FORMAT_EXE} -i -style=file ${ALL_FMT_FILES} + COMMENT "Formatting source code..." + ) +else() + message(WARNING "clang-format not found! 'format' target will be disabled.") +endif() + +# clang-tidy +# find_program(CLANG_TIDY_EXE clang-tidy) +# if(CLANG_TIDY_EXE) +# message(STATUS "Clang-Tidy enabled: will run automatically during compilation.") +# set(CMAKE_CXX_CLANG_TIDY "${CLANG_TIDY_EXE}") +# else() +# message(WARNING "clang-tidy not found! Static analysis will be disabled.") +# endif() + +foreach (tidy_target ${ALL_SRC_FILES}) + get_filename_component (basename ${tidy_target} NAME) + get_filename_component (dirname ${tidy_target} DIRECTORY) + get_filename_component (basedir ${dirname} NAME) + set (tidy_target_name "${basedir}__${basename}") + set (tidy_command clang-tidy --quiet -header-filter=.* -p=${PROJECT_BINARY_DIR} ${tidy_target}) + add_custom_target (tidy_${tidy_target_name} ${tidy_command}) + list (APPEND ALL_TIDY_TARGETS tidy_${tidy_target_name}) + + if (${tidy_target} IN_LIST RayTracer_CC_FILES) + list (APPEND RayTracer_TIDY_TARGETS tidy_${tidy_target_name}) + endif () +endforeach (tidy_target) + +add_custom_target (tidy DEPENDS ${RayTracer_TIDY_TARGETS}) + +add_custom_target (tidy-all DEPENDS ${ALL_TIDY_TARGETS}) diff --git a/raytracing/scripts/make-parallel.sh b/raytracing/scripts/make-parallel.sh new file mode 100755 index 0000000..879af9a --- /dev/null +++ b/raytracing/scripts/make-parallel.sh @@ -0,0 +1,2 @@ +#!/bin/sh +exec make -j`nproc` "$@" diff --git a/raytracing/src/CMakeLists.txt b/raytracing/src/CMakeLists.txt new file mode 100644 index 0000000..c0dc29c --- /dev/null +++ b/raytracing/src/CMakeLists.txt @@ -0,0 +1,9 @@ +set(LIB_SOURCES + vec3.cc + color.cc + ray.cc +) + +add_library(RayTracerCore STATIC ${LIB_SOURCES}) + +target_include_directories(RayTracerCore PUBLIC .)
\ No newline at end of file diff --git a/raytracing/src/color.cc b/raytracing/src/color.cc new file mode 100644 index 0000000..9a458bc --- /dev/null +++ b/raytracing/src/color.cc @@ -0,0 +1,32 @@ +/* + * Copyright (C) 2026 Richard + * + * This program 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 <https://www.gnu.org/licenses/>. + */ +#include "color.h" + +void write_color( std::ostream& out, const color& pixel_color ) +{ + auto red = pixel_color.x(); + auto green = pixel_color.y(); + auto blue = pixel_color.z(); + + // Translate the [0,1] component values to the byte range [0,255]. + const int rbyte = static_cast<int>( 255.999 * red ); + const int gbyte = static_cast<int>( 255.999 * green ); + const int bbyte = static_cast<int>( 255.999 * blue ); + + // Write out the pixel color components. + out << rbyte << ' ' << gbyte << ' ' << bbyte << '\n'; +}
\ No newline at end of file diff --git a/raytracing/src/color.h b/raytracing/src/color.h new file mode 100644 index 0000000..3e96a5b --- /dev/null +++ b/raytracing/src/color.h @@ -0,0 +1,28 @@ +/* + * Copyright (C) 2026 Richard + * + * This program 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 <https://www.gnu.org/licenses/>. + */ +#ifndef COLOR_H +#define COLOR_H + +#include "vec3.h" + +#include <iostream> + +using color = vec3; + +void write_color( std::ostream& out, const color& pixel_color ); + +#endif
\ No newline at end of file diff --git a/raytracing/src/ray.cc b/raytracing/src/ray.cc new file mode 100644 index 0000000..718fee2 --- /dev/null +++ b/raytracing/src/ray.cc @@ -0,0 +1,16 @@ +#include "ray.h" + +const point3& ray::origin() const +{ + return this->orig; +} + +const vec3& ray::direction() const +{ + return this->dir; +} + +point3 ray::at( double t ) const +{ + return this->orig + t * this->dir; +}
\ No newline at end of file diff --git a/raytracing/src/ray.h b/raytracing/src/ray.h new file mode 100644 index 0000000..d455847 --- /dev/null +++ b/raytracing/src/ray.h @@ -0,0 +1,22 @@ +#ifndef RAY_H +#define RAY_H + +#include "vec3.h" + +class ray +{ +public: + ray() {} + ray( const point3& origin, const vec3& direction ) : orig( origin ), dir( direction ) {} + + const point3& origin() const; + const vec3& direction() const; + + point3 at( double t ) const; + +private: + point3 orig {}; + vec3 dir {}; +}; + +#endif
\ No newline at end of file diff --git a/raytracing/src/vec3.cc b/raytracing/src/vec3.cc new file mode 100644 index 0000000..4332c56 --- /dev/null +++ b/raytracing/src/vec3.cc @@ -0,0 +1,76 @@ +/* + * Copyright (C) 2026 Richard + * + * This program 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 <https://www.gnu.org/licenses/>. + */ +#include "vec3.h" + +double vec3::x() const +{ + return e[0]; +} +double vec3::y() const +{ + return e[1]; +} +double vec3::z() const +{ + return e[2]; +} + +vec3 vec3::operator-() const +{ + return { -e[0], -e[1], -e[2] }; +} + +double vec3::operator[]( int i ) const +{ + return e.at( i ); +} + +double& vec3::operator[]( int i ) +{ + return e.at( i ); +} + +vec3& vec3::operator+=( const vec3& other ) +{ + e[0] += other.e[0]; + e[1] += other.e[1]; + e[2] += other.e[2]; + return *this; +} + +vec3& vec3::operator*=( double t ) +{ + e[0] *= t; + e[1] *= t; + e[2] *= t; + return *this; +} + +vec3& vec3::operator/=( double t ) +{ + return *this *= 1 / t; +} + +double vec3::length() const +{ + return std::sqrt( length_squared() ); +} + +double vec3::length_squared() const +{ + return e[0] * e[0] + e[1] * e[1] + e[2] * e[2]; +} diff --git a/raytracing/src/vec3.h b/raytracing/src/vec3.h new file mode 100644 index 0000000..a8b8265 --- /dev/null +++ b/raytracing/src/vec3.h @@ -0,0 +1,102 @@ +/* + * Copyright (C) 2026 Richard + * + * This program 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 <https://www.gnu.org/licenses/>. + */ +#ifndef VEC_3 +#define VEC_3 + +#include <array> +#include <cmath> +#include <iostream> + +class vec3 +{ +public: + std::array<double, 3> e; + + vec3() : e { 0, 0, 0 } {} + vec3( double e0, double e1, double e2 ) : e { e0, e1, e2 } {} + + double x() const; + double y() const; + double z() const; + + vec3 operator-() const; + double operator[]( int i ) const; + double& operator[]( int i ); + vec3& operator+=( const vec3& other ); + vec3& operator*=( double t ); + vec3& operator/=( double t ); + double length() const; + double length_squared() const; +}; + +// point3 is just an alias for vec3, but useful for geometric clarity in the code. +using point3 = vec3; + +// Vector Utility Functions + +inline std::ostream& operator<<( std::ostream& out, const vec3& v ) +{ + return out << v.e[0] << ' ' << v.e[1] << ' ' << v.e[2]; +} + +inline vec3 operator+( const vec3& u, const vec3& v ) +{ + return { u.e[0] + v.e[0], u.e[1] + v.e[1], u.e[2] + v.e[2] }; +} + +inline vec3 operator-( const vec3& u, const vec3& v ) +{ + return { u.e[0] - v.e[0], u.e[1] - v.e[1], u.e[2] - v.e[2] }; +} + +inline vec3 operator*( const vec3& u, const vec3& v ) +{ + return { u.e[0] * v.e[0], u.e[1] * v.e[1], u.e[2] * v.e[2] }; +} + +inline vec3 operator*( double t, const vec3& v ) +{ + return { t * v.e[0], t * v.e[1], t * v.e[2] }; +} + +inline vec3 operator*( const vec3& v, double t ) +{ + return t * v; +} + +inline vec3 operator/( const vec3& v, double t ) +{ + return ( 1 / t ) * v; +} + +inline double dot( const vec3& u, const vec3& v ) +{ + return u.e[0] * v.e[0] + u.e[1] * v.e[1] + u.e[2] * v.e[2]; +} + +inline vec3 cross( const vec3& u, const vec3& v ) +{ + return { + u.e[1] * v.e[2] - u.e[2] * v.e[1], u.e[2] * v.e[0] - u.e[0] * v.e[2], u.e[0] * v.e[1] - u.e[1] * v.e[0] }; +} + +inline vec3 unit_vector( const vec3& v ) +{ + return v / v.length(); +} + +#endif |