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vpGetLight(3)         DragonFly Library Functions Manual         vpGetLight(3)

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)

VolPack                                                          vpGetLight(3)