# sc_OneBodyOneCenterDerivInt - Man Page

OneBodyOneCenterDerivInt is an abstract base class for objects that compute one body derivative integrals on a single center.

## Synopsis

`#include <obint.h>`

Inherits **sc::RefCount**.

### Public Member Functions

**OneBodyOneCenterDerivInt** (**Integral** *, const **Ref**< **GaussianBasisSet** > &b)

int **nbasis** () const

Return the number of basis functions on center one.

int **nbasis1** () const

Return the number of basis functions on center one.

int **nshell** () const

Return the number of shells on center one.

int **nshell1** () const

Return the number of shells on center one. **Ref**< **GaussianBasisSet** > **basis** ()

Return the basis set on center one. **Ref**< **GaussianBasisSet** > **basis1** ()

Return the basis set on center one.

const double * **buffer** () const

The computed shell integrals will be put in the buffer returned by this member.

virtual void **compute_shell** (int ish, **DerivCenters** &)=0**Compute** the derivative integrals and place the result in the buffer returned by **buffer()**.

virtual void **compute_shell** (int ish, int center)=0**Compute** the derivative integrals with respect to the given center and place the result in the buffer returned by **buffer()**.

### Protected Attributes

**Integral** * **integral_****Ref**< **GaussianBasisSet** > **bs1**

double * **buffer_**

### Additional Inherited Members

## Detailed Description

**OneBodyOneCenterDerivInt** is an abstract base class for objects that compute one body derivative integrals on a single center.

## Member Function Documentation

### const double* sc::OneBodyOneCenterDerivInt::buffer () const

The computed shell integrals will be put in the buffer returned by this member.

## Author

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