Package utils

This module bundles various general purpose utilities: - hexdumping - parsing all files in a directory tree - 3D related tasks (see TriStrip.py, MathUtils.py, QuickHull.py, and Inertia.py)

Submodules

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pyffi.utils.graph: Base classes for organizing data (for instance to visualize data with Qt, or to run hierarchical checks) in a global graph, and a detail tree at each node of the global graph.
pyffi.utils.inertia: Calculate the mass, center of gravity, and inertia matrix for common shapes.
pyffi.utils.mathutils: A lightweight library for common vector and matrix operations.
pyffi.utils.mopp: Create mopps using mopper.exe
pyffi.utils.quickhull: A simple implementation of the quick hull algorithm.
pyffi.utils.tangentspace: A module for tangent space calculation.
pyffi.utils.trianglemesh
pyffi.utils.trianglestripifier: A general purpose stripifier, based on NvTriStrip (http://developer.nvidia.com/)
pyffi.utils.tristrip: A wrapper for TriangleStripifier and some utility functions, for stripification of sets of triangles, stitching and unstitching strips, and triangulation of strips.
pyffi.utils.vertex_cache: Algorithms to reorder triangle list order and vertex order aiming to minimize vertex cache misses.

Functions

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walk(top, topdown=True, onerror=None, re_filename=None)
A variant of os.walk() which also works if top is a file instead of a directory, filters files by name, and returns full path.

source code

hex_dump(f, num_lines=8)
A function for hexdumping.

source code

unique_map(hash_generator)
Return a map and inverse map to indentify unique values based on hash, which is useful for removing duplicate data.

source code

Variables

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chartable = '................................ !"#$%&\'()*+,-./...

__package__ = 'pyffi.utils'

Function Details

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walk(top, topdown=True, onerror=None, re_filename=None)

source code

A variant of os.walk() which also works if top is a file instead of a directory, filters files by name, and returns full path. File names are returned in alphabetical order.

Parameters:

top (str) - The top directory or file.
topdown (bool) - Whether to list directories first or not.
onerror (function) - Which function to call when an error occurs.
re_filename (compiled regular expression (see re module)) - Regular expression to match file names.

unique_map(hash_generator)

source code

Return a map and inverse map to indentify unique values based on hash, which is useful for removing duplicate data. If the hash generator yields None then the value is mapped to None (useful for discarding data).

>>> unique_map([])
([], [])
>>> unique_map([3,2,6,None,1])
([0, 1, 2, None, 3], [0, 1, 2, 4])
>>> unique_map([3,1,6,1])
([0, 1, 2, 1], [0, 1, 2])
>>> unique_map([3,1,6,1,2,2,9,3,2])
([0, 1, 2, 1, 3, 3, 4, 0, 3], [0, 1, 2, 4, 6])

Variables Details

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chartable

Value:

'................................ !"#$%&\'()*+,-./0123456789:;<=>?@ABC
DEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~..........
......................................................................
.................................................'

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