48 lines
1.2 KiB
Org Mode
48 lines
1.2 KiB
Org Mode
* Minimal graphical applications in BQN
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Bindings for [[https://github.com/zserge/fenster][Fenster]], providing a set of functions for displaying a
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window and setting the color of individual pixels inside.
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** Setup
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Clone the repository recursively (~git clone --recurse-submodules~)
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and run ~make~ to build the shared library. The Makefile should work
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on Linux and macOS.
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** API
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- ~OpenWindow w‿h‿t~ opens a window of width ~w~ and height ~h~, with
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title ~t~. Returns a window handle.
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- ~CloseWindow w~ closes a window given its handle ~w~.
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- ~F _render w~ runs the function ~F~ at each coordinate of the window
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~w~ and set the corresponding pixel color. ~F~ should be a function
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returning a color as an RGB triplet in the (0,1) range, and taking a
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list of three elements ~x‿y‿t~, where ~x~ and ~y~ are the pixel
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coordinates and ~t~ is the time.
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** Example
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See [[./example.bqn][example.bqn]].
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#+begin_src bqn
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f←•Import "fenster.bqn"
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size←500
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w←f.OpenWindow size‿size‿"bqn-fenster example"
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Rainbow←{𝕊x‿y‿t:
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x‿y↩x‿y÷size
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t↩(100|t)÷100
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h←(x+y)÷2
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f.HSVtoRGB⟨360×h,1,1⟩
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}
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Rainbow f._render w
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•Delay 3
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f.CloseWindow w
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#+end_src
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[[./example.png]]
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