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


     SYNOPSIS
	  #include <Dt.h>


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


     DESCRIPTION
	  DtLineGetNormalIndex() returns a list	of line	normal indices
	  via the pointer to the variable indices given	the shape
	  number, shapeID, and group number, groupID. The total	number
	  of normal indices into the normal list (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 triangles, the
	  format of the	normal index array will	be:

	       1 2 3 -1	4 5 6 -1

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

	  If no	normals	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
	  DtLineGetNormalIndex() returns one on	success	and zero on
	  failure.


     SEE ALSO
	  DtIndexCount(3W)


     FILES
	  Link with -lDtOMio