NAME
	  DtLineGetIndex - Get the list of line indices for all the
	  lines	in the given shape and group IDs.


     SYNOPSIS
	  #include <Dt.h>


	  int  DtLineGetIndex( int shapeID, int	groupID, int *count, long **indices);


     DESCRIPTION
	  DtLineGetIndex() returns a list of line vertex indices via
	  the pointer to the variable indices given the	shape number,
	  shapeID, and group number, groupID. The total	number of
	  indices (the length of the indices array) is returned	via
	  the pointer to the count parameter.  Each line in the
	  indices array	is separated by	an index DtEND_OF_FACE (-1).
	  The number of	indices	return via the pointer to count
	  includes the DtEND_OF_FACE separators.  For example, if the
	  first	group (groupID = 0) of the first shape (shapeID	= 0)
	  has two lines, the format of the index array will be:

	       1 2 3 4 5 6 -1 7	8 9 -1

	  were indices 1, 2, 3,	4, 5, 6	are for	line 0 and 7, 8, and 9
	  are for line 1.  The parameter count will be set to 11.

	  If no	line objects exist the indices array will be set to
	  NULL.	 The indices array is an internal buffer.  Do not free
	  or modify the	index array.


     DIAGNOSTICS
	  DtLineGetIndex() returns one on success and zero on failure.


     SEE ALSO
	  DtIndexCount(3W)


     FILES
	  Link with -lDtOMio