Ole-Morten Duesund
f8b7ff475c
Preserves Andrew Kensler's original card.cc verbatim and adds: - CMakeLists.txt building both the original and a de-obfuscated variant (card_explained.cc) that produces a visually identical render - A heavily annotated rewrite explaining the vector ops, ray-sphere intersection, soft shadows, depth of field, and reflection recursion - Rendered sample output (docs/aek.png) embedded in the README - CLAUDE.md establishing the "never modify card.cc" rule for future work
43 lines
1.7 KiB
CMake
43 lines
1.7 KiB
CMake
cmake_minimum_required(VERSION 3.16)
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project(card_raytracer CXX)
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# The original card.cc is sacred and must NOT be modified. We compile it
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# verbatim. Because the file is golfed C++ from the early 2010s, we relax
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# a few things so a modern compiler accepts it untouched:
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# - C++14 (default constructor v(){} is fine; pow(float,int) overload exists)
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# - -w silences the unavoidable warnings (implicit float->int conversions
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# in the final printf, narrowing, unused result of operator new, etc.)
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# We can't fix them — we'd have to edit card.cc, which we won't.
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set(CMAKE_CXX_STANDARD 14)
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set(CMAKE_CXX_STANDARD_REQUIRED ON)
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set(CMAKE_CXX_EXTENSIONS OFF)
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add_executable(card card.cc)
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add_executable(card_explained card_explained.cc)
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# Per-compiler flags. The original is golfed and triggers warnings we can't
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# fix without editing it (forbidden). The de-obfuscated version keeps full
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# warnings on so it stays honest.
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if(MSVC)
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target_compile_options(card PRIVATE /w /O2)
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target_compile_options(card_explained PRIVATE /W4 /O2)
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else()
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target_compile_options(card PRIVATE -w -O3)
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target_compile_options(card_explained PRIVATE -Wall -Wextra -O3)
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endif()
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# Convenience targets: render an image from each binary.
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# Run with: cmake --build build --target image
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add_custom_target(image
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COMMAND card > aek.ppm
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DEPENDS card
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WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
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COMMENT "Rendering aek.ppm from the original card (512x512 @ 64 spp)"
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)
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add_custom_target(image_explained
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COMMAND card_explained > aek_explained.ppm
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DEPENDS card_explained
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WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
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COMMENT "Rendering aek_explained.ppm from the de-obfuscated card"
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)
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