> ## Name

> cgGetStateAssignmentIndex - get the array index of a state assignment for array-valued state

> ## Synopsis

>     #include <Cg/cg.h>

>     int cgGetStateAssignmentIndex( CGstateassignment sa );

> ## Parameters

> sa
>   The state assignment.

> ## Return Values

> Returns an integer index value.

> Returns 0 if the CGstate for this state assignment is not an array type.

> ## Description

> cgGetStateAssignmentIndex returns the array index of a state assignment if the state it is based on is an array type.

> ## Examples

> Given a "LightPosition" state defined as an array of eight float3 values and an effect file with the following state assignment:

>       pass { LightPosition[3] = float3(10,0,0); }

> cgGetStateAssignmentIndex will return 3 when passed a handle to this state assignment.

> ## Errors

> CG_INVALID_STATE_ASSIGNMENT_HANDLE_ERROR is generated if sa is not a valid state assignment.

> ## History

> cgGetStateAssignmentIndex was introduced in Cg 1.4.

> ## See Also

> cgIsStateAssignment, cgCreateStateAssignmentIndex