Helper Functions and Classes

We have a number of helper functions and classes that are used by various parts of the code base. These may be useful to know about, since they may be useful for other projects that use galsim and have similar needs.

• Lookup Tables
  • LookupTable
  • LookupTable2D
  • _LookupTable2D()
  • trapz()
• Catalogs and Input Dictionaries
  • Catalog
  • OutputCatalog
  • Dict
• Interpolants
  • Interpolant
  • Delta
  • Nearest
  • Linear
  • Cubic
  • Quintic
  • SincInterpolant
  • Lanczos
• Interfacing with FITS Files
  • Reading FITS Files
  • Writing FITS Files
  • FITS Headers
• Integration
  • int1d()
  • hankel()
  • IntegrationRule
  • MidptRule
  • TrapzRule
  • QuadRule
  • midptRule
  • trapzRule
  • quadRule
  • ImageIntegrator
  • SampleIntegrator
  • ContinuousIntegrator
• Bessel Functions
  • j0()
  • j1()
  • jv()
  • jn()
  • kv()
  • kn()
  • yv()
  • yn()
  • iv()
  • j0_root()
  • jv_root()
  • si()
  • ci()
  • sinc()
  • gammainc()
• Fourier Transforms
  • fft2()
  • ifft2()
  • rfft2()
  • irfft2()
• Zernike Functions
  • Zernike
  • DoubleZernike
  • noll_to_zern()
  • zernikeRotMatrix()
  • zernikeBasis()
  • zernikeGradBases()
  • doubleZernikeBasis()
  • describe_zernike()
• Differential Chromatic Refraction
  • air_refractive_index_minus_one()
  • get_refraction()
  • zenith_parallactic_angles()
  • parse_dcr_angles()
• Charge Deflection Model
  • BaseCDModel
  • PowerLawCD
• Miscellaneous Utilities
  • Decorators
  • OpenMP Utilties
  • LRU Cache
  • Context Manager for writing AtmosphericScreen pickles
  • Other Possibly Useful Classes
  • Math Calculations
  • Utilities Related to NumPy Functions
  • Test Suite Helper Functions and Contexts
  • Other Helper Functions
  • GalSim-specific Helper Functions