pwem.convert.trigonometry module

class pwem.convert.trigonometry.FibonacciSphere(half_points=2500)[source]

static fibonacci_sphere(num_points: int = 5000)[source]

1000 OK small graph 5000 OK large graph more than 10000 does not make sense

Computes a set of x,y,z equidistant points on the surface of a sphere of radius 1 using the fibonacci method

:returns x,y,z as lists

class pwem.convert.trigonometry.TrigonometricMemoization(factor=100)[source]

Stores sines of 0 to 90 degrees in a list. These are used as the basis for calculating and returning sines, cosines and tangents of any angle.

With the default, errors are in the 4th decimal point

Calculates sines of 0 to 90 degrees and appends them to a list.

Parameters: factor – default(100). List size = 90 * factor. The higher the factor the higher the precision.

cosine(degrees)[source]: Cosine can easily be calculated from sine by shifting 90 degrees.

sine(degrees)[source]: Calculates sine of any angle from values stored in list.

tangent(degrees)[source]: Tangent is calculated using the sine and cosine from the other two methods.