vec
Fast length two and three vectors.
The vec
module provides four classes vec2
, vec3
,
tens3
, and stens3
which are specialized fast types for
representing vectors and tensors. The statement from vec import
vec
will import the 2 or 3d version in PFC2D and PFC3D respectively.
vec
, tens
, and stens
objects interoperate with NumPy. Many
of the itasca
module API functions accept or return these objects.
This module was created because NumPy is relatively slow for small
arrays.
Examples:
>>> from vec import vec3
>>> a = vec3((1, 1, 1))
>>> b = vec3((2, 2, 2))
>>> print a
vec3((1.000000e+00, 1.000000e+00, 1.000000e+00))
The typical operations are defined:
>>> a+b
vec3((3.000000e+00, 3.000000e+00, 3.000000e+00))
>>> b / (a + 0.1)
vec3((1.818182e+00, 1.818182e+00, 1.818182e+00))
as well as some operations specific to vectors
>>> b.mag()
3.4641016151377544
>>> a.norm()
vec3((5.773503e-01, 5.773503e-01, 5.773503e-01))
>>> a.dot(b)
6.0
Classes
Sub-modules
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