skPatterns (shader module)

The one pattern library every styleKit block draws from: hashes, value noise and fractal noise in 2D and 3D, cell (Worley) distance, a round dot screen sized by tone, parallel hatching and a 4x4 ordered threshold. Pure math with no bindings, so a full-frame block and a surface material that includes a block's piece share the same marks. Include it with #include "~styleKit.shaders.skPatterns" (the package name reaches it wherever styleKit was installed).