Class

NumCosmoGalaxyPositionFactor

Description [src]

abstract class NumCosmo.GalaxyPositionFactor : GObject.Object
{
  /* No available fields */
}

Abstract calculator for the galaxy sky-position distribution.

A calculator (a plain GObject, NOT an NcmModel and NOT held in an NcmMSet) that produces the per-galaxy position density $p(\mathrm{ra}, \mathrm{dec} \mid I)$. The galaxy position is observed directly — there is no true-vs-observed scatter split and (for the flat scheme) no fitted parameters — so, unlike NcGalaxyRedshiftFactor, the position collapses to a single distribution with no companion NcmModel: the scheme carries its own survey geometry as configuration.

Concrete schemes live as subclasses following the NcPowspecML pattern (the abstract base owns the shared machinery once; each scheme owns its observed fragment, engine and sampler). The only scheme today is the flat scheme (NcGalaxyPositionFactorFlat, uniform over a sky footprint); a future clustered scheme would gain fitted parameters and read a cosmology/halo model from mset, which is why mset is threaded through the vtable even though the flat scheme ignores it.

Ancestors

GObject

Descendants

NcGalaxyPositionFactorFlat

Functions

nc_galaxy_position_factor_clear

Decreases the reference count of gspf by one, and sets the pointer *gspf to NULL.

Instance methods

nc_galaxy_position_factor_free

Decreases the reference count of gspf by one.

nc_galaxy_position_factor_gen

Generates a new galaxy position sample into data. The data object must be initialized beforehand.

nc_galaxy_position_factor_get_hash

No description available.

nc_galaxy_position_factor_integ

Builds the per-galaxy position density $p(\mathrm{ra}, \mathrm{dec} \mid I)$ as a callback evaluated at the galaxy’s stored position. The position is not integrated (it is observed directly); the callback is a fixed-position evaluation.

nc_galaxy_position_factor_prepare

Factory-level prepare: validates the scheme’s models in mset and refreshes whatever it caches for efficient subsequent nc_galaxy_position_factor_update_data() calls. Cheap/no-op for the flat scheme, which has no models to resolve.

nc_galaxy_position_factor_ref

Increases the reference count of gspf by one.

nc_galaxy_position_factor_update_data

Unconditionally refreshes data‘s cached state from what the last nc_galaxy_position_factor_prepare() call resolved (default: no-op).

Methods inherited from GObject (43)

Please see GObject for a full list of methods.

Signals

Signals inherited from GObject (1)

GObject::notify

The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.

Class structure

struct NumCosmoGalaxyPositionFactorClass {
  void (* data_init) (
    NcGalaxyPositionFactor* gspf,
    NcmMSet* mset,
    NcGalaxyPositionFactorData* data
  );
  void (* gen) (
    NcGalaxyPositionFactor* gspf,
    NcmMSet* mset,
    NcGalaxyPositionFactorData* data,
    NcmRNG* rng
  );
  void (* prepare) (
    NcGalaxyPositionFactor* gspf,
    NcmMSet* mset
  );
  NcGalaxyPositionFactorIntegrand* (* integ) (
    NcGalaxyPositionFactor* gspf,
    NcmMSet* mset,
    gboolean use_lnp
  );
  guint64 (* get_hash) (
    NcGalaxyPositionFactor* gspf
  );
  void (* update_data) (
    NcGalaxyPositionFactor* gspf,
    NcGalaxyPositionFactorData* data
  );
  
}