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