NAME
	  DtGroupGetTextureVertex - Get	a texture vertex for the given
	  group	and texture vertex index.


     SYNOPSIS
	  #include <Dt.h>


	  int  DtGroupGetTextureVertex(	int shapeID, int groupID, int index, DtVec2f *vertex )


     DESCRIPTION
	  DtGroupGetTextureVertex() returns a texture vertex for the
	  group	indicated by the given shapeID,	groupID	and index. The
	  texture vertex is returned via the pointer to	the vertex
	  parameter.  C	programmers can	access the components of the
	  texture vertex vector	as though it were a simple structure
	  as follows:

		    typedef struct DtVec2f { float vec[2];};

		    DtVec2f tVert;
		    u =	tVert.vec[0];
		    v =	tVert.vec[1];


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


     FILES
	  Link with -lDtOMio