rle-funcs

Functional programming primitives and abstractions for narrowband level sets. This library gives you tools for combining and iterating over volumes.

Installation

You can install it via rle-funcs:

npm install rle-funcs

Or else just include rle-all which has it as a subcomponent:

npm install rle

Usage

apply(volume, stencil, update_func)

This applies a function to the volume pointwise. Useful for implementing cellular automata and other local differential equations.

• volume: The volume we are applying the stencil operator to.

• stencil: The neighborhood stencil that we are using on the volume.

• update_func(phases, distances, retval): A function that takes three arguments:

  • phases: An array of length stencil.length of material phases.
  • distances: An array of length stencil.length of distances to the material boundary
  • retval: A length two array for the return value of the function. The first item is the new phase and the second item is the distance to the phase boundary.

Returns: A new run length encoded volume, which is the result of applying update_func at every point in the volume.

merge(volumes, merge_func)

This merges a collection of volumes together. This acts like a generalized boolean operation amongst the volumes.

• volumes: An array of volumes:
• merge_func(phases, distances, retval)

Returns: The result of calling merge_func at every point in the volumes.

Credits

(c) 2013 Mikola Lysenko