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This commit adds the function `glm_perspective_lh_zo`, modelled on the implementation of glm_perspective, but amended to provide a left-hand coordinate system expected by DirectX, Metal and Vulkan (per the GLM project's `glm/detail/setup.hpp`). It uses a clip-space of zero-to-one. The function is tested against a longhand version of the algorithm it seeks to implement as well as against the output of the GLM project's `glm::perspectiveLH_ZO` function. This commit adds a new subdirectory `test/glm_cmp` which contains a basic CMake file and `main.cpp`. An interested user should link or copy or clone the GLM project into this directory. The `main` function can be used to print the reference data used so others can verify behaviour in the future, or add new literal reference values.
9 lines
530 B
Markdown
9 lines
530 B
Markdown
### Simple GLM app for quick generation of reference values
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#### Usage
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1. Clone, link or copy the GLM library's root directory to `test/glm_cmp/glm`.
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1. Ensuring your current directory is `test/glm_cmp`:
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`mkdir build && cd build && cmake .. && make && ./glmcmp`
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Please do not delete prior reference-data-producing functions as it may be necessary to return to these to examine future bugs or assumptions. By all means remove or comment-out the call site from the `main` function, though, to focus on what you're working on.
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