---
name: "sc_SphericalTransformComponent"
section: "3"
platform: "linux"
package: "libsc-doc"
version: "2.3.1-22"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/sc_SphericalTransformComponent"
---

# sc\_SphericalTransformComponent(3)

This is a base class for a container for a component of a sparse Cartesian to solid harmonic basis function transformation.

## NAME

sc::SphericalTransformComponent - This is a base class for a container for a component of a sparse Cartesian to solid harmonic basis function transformation.

## SYNOPSIS

`#include <transform.h>`

Inherited by **sc::SphericalTransformComponentCCA**, **sc::SphericalTransformComponentCints**, and **sc::SphericalTransformComponentV3**.

### Public Member Functions

int **a** () const\
 Returns the exponent of x.  int **b** () const\
 Returns the exponent of y.  int **c** () const\
 Returns the exponent of z.  int **cartindex** () const\
 Returns the index of the Cartesian basis function.  int **pureindex** () const\
 Returns the index solid harmonic basis function.  double **coef** () const\
 Returns the coefficient of this component of the transformation.  virtual void **init** (int **a**, int **b**, int **c**, double **coef**, int **pureindex**)=0\
 Initialize this object.

### Protected Attributes

double **coef\_**\
 int **a\_**\
 int **b\_**\
 int **c\_**\
 int **cartindex\_**\
 int **pureindex\_**\

## Detailed Description

This is a base class for a container for a component of a sparse Cartesian to solid harmonic basis function transformation.

## Member Function Documentation

### virtual void sc::SphericalTransformComponent::init (int a, int b, int c, double coef, int pureindex)` [pure virtual]`

Initialize this object. This must be provided in all specializations of this class to establish the ordering between a, b and c and the index of the Cartesian basis function. Other things such as adjustment of the coefficient to account for normalization differences can be done as well. The default **SphericalTransform::init()** implementation requires that only the xl , yl  and zl  basis functions are normalized to unity.

Implemented in **sc::SphericalTransformComponentCints**, **sc::SphericalTransformComponentCCA**, and **sc::SphericalTransformComponentV3**.

## Author

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