NAME

       vpGetLight - get lighting properties

SYNOPSIS

       #include <volpack.h>

       vpResult
       vpGetLight(vpc, light_num, property, n0_ptr, n1_ptr, n2_ptr)
           vpContext *vpc;
           int light_num;
           int property;
           double *n0_ptr, *n1_ptr, *n2_ptr;

ARGUMENTS

       vpc    VolPack context from vpCreateContext.

       light_num
              A constant specifying a particular light source (VP_LIGHT0, VP_LIGHT1, ..., VP_LIGHT5).

       property
              A constant specifying one lighting property (VP_COLOR or VP_DIRECTION).

       n0_ptr, n1_ptr, n2_ptr
              Locations  for storing the result: components of an RGB color (for VP_COLOR) or a direction vector
              (for VP_DIRECTION).

DESCRIPTION

       vpGetLight is used to get the properties of a light source.   The  arguments  are  exactly  analogous  to
       vpSetLight  except  that  the  final  three  arguments are pointers to locations for storing the lighting
       properties.

ERRORS

       The normal return value is VP_OK.  The following error return values are possible:

       VPERROR_LIMIT_EXCEEDED
              The light number is invalid or exceeds an implementation limit.

       VPERROR_BAD_OPTION
              The property argument is invalid.

SEE ALSO

       VolPack(3), vpCreateContext(3), vpSetLight(3)