# 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()**.

Public Member Functions inherited from **sc::RefCount**

int **lock_ptr** () const

Lock this object.

int **unlock_ptr** () const

Unlock this object.

void **use_locks** (bool inVal)

start and stop using locks on this object

refcount_t **nreference** () const

Return the reference count.

refcount_t **reference** ()

Increment the reference count and return the new count.

refcount_t **dereference** ()

Decrement the reference count and return the new count.

int **managed** () const

void **unmanage** ()

Turn off the reference counting mechanism for this object.

int **managed** () const

Return 1 if the object is managed. Otherwise return 0.

Public Member Functions inherited from **sc::Identity****Identifier identifier** ()

Return the **Identifier** for this argument.

### Protected Attributes

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

double * **buffer_**

### Additional Inherited Members

Protected Member Functions inherited from **sc::RefCount**

**RefCount** (const **RefCount** &)**RefCount** & **operator=** (const **RefCount** &)

## 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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