lingdong- / ofxpoissonfill

Poisson filling shader for OpenFrameworks

🎨 Art I make art with code. shan-shui-inf Procedurally generated Chinese landscape painting. ____________________________________________________________  HTML    ★ 5466 nonflowers Procedurally generated paintings of nonexistent flowers. ____________________________________________________________  JavaScript    ★ 503 Hermit A man. A horse. A nature. ____________________________________________________________  Python    ★ 167

🀄️ Language design I designed 文言 or wenyan-lang, a programming language in Classical Chinese, and some others. wenyan 文言文編程語言 A programming language for the ancient Chinese. ____________________________________________________________  TypeScript    ★ 19447 book 文言陰符 An Introduction to Programming in Wenyan Language ____________________________________________________________  JavaScript    ★ 315 wax A tiny programming language that transpiles to C, C++, Java, TypeScript, Python, C#, Swift, Lua and WebAssembly 🚀 ____________________________________________________________  C    ★ 733 psvg Programmable Scalable Vector Graphics -- drawings that draw themselves ____________________________________________________________  TypeScript    ★ 297

🖌 Typography I make fonts and typography experiments (mostly with Chinese characters) rrpl Describing Chinese Characters with Recursive Radical Packing Language (RRPL) ____________________________________________________________  JavaScript    ★ 849 qiji-font 齊伋體 - typeface from Ming Dynasty woodblock printed books ____________________________________________________________  Python    ★ 1252 edges2calligraphy Using pix2pix to convert scribbles to Chinese calligraphy ____________________________________________________________  JavaScript    ★ 114 chinese-hershey-font Convert Chinese Characters to Single-Line Fonts using Computer Vision ____________________________________________________________  Python    ★ 123

🛠 Other cool stuff Apps, libraries, toolkits, algorithms, and more! linedraw Convert images to vectorized line drawings for plotters. ____________________________________________________________  Python    ★ 744 skeleton-tracing A new algorithm for retrieving topological skeleton as a set of polylines from binary images ____________________________________________________________  C    ★ 488 cope A modern IDE for writing classical Chinese poetry 格律诗编辑程序 ____________________________________________________________  JavaScript    ★ 456 wasm-fun Non-trivial programs in hand-written WebAssembly ____________________________________________________________  WebAssembly    ★ 77 r1b A thermal-printer-oriented, 1-bit graphics rasterizer for 2D and 3D ____________________________________________________________  C    ★ 71 grand-timeline Interactive grand unified timeline of 30,800 ancient Chinese people / 古人全表 ____________________________________________________________  JavaScript    ★ 110 Loshu.js A linear algebra library for JavaScript 🔢 ____________________________________________________________  JavaScript    ★ 46 interesting-polygon-archive Collection of polygon data in various formats for testing computational geometry algorithms. ____________________________________________________________  Processing    ★ 46

The list above is a small selection of my favorite projects. There're a lot more on the Repos page. Check out my portfolio and my Glitch too!

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ofxpoissonfill's Issues

does it work for non power of two texture sizes?

Thanks for this great addon!
I've noticed it sometimes cause an offset of the original image if using arbitrary texture sizes, like 1920x1080
and using power of two textures, like 512 x 512 the effect mantains the alignment with the original scene.
is it possible to use different texture values?
Thank you

Branching in the Shader

Hi there! Thanks for making this addon. I was working on porting it to SparkAR but I noticed there is quite a lot of branching in the shader, especially with the G and h1 functions. Apologies for the unsolicited issues, but I wonder if you might increase performance by using arrays instead of the branching if statements.

  float h1[5] = {0.1507, 0.6836, 1.0334, 0.6836, 0.1507};
  float G[3] = {0.0312, 0.7753, 0.0312};

And then later on, you can also simplify this calculation be only calculating the weight once:

float weight = h1[dx + 2] * h1[dy + 2];
acc += col * weight;

The last parts of each section of the shader could remove the check for if acc.a == 0.0 to also read something like:

float mask = step(0.00001, acc.a);
fragColor= vec4(acc.rgb / acc.a, 1.0) * mask + acc * (1.0-mask);

poisson disc

Thanks for making this add-on.
Can it be used to do poisson disc sampling? i.e. get a point cloud instead of manipulating a texture?

Like here:
https://www.jasondavies.com/poisson-disc/