NAME
	  DtGroupGetCount - Get	the number of groups in	a given	shape.


     SYNOPSIS
	  #include <Dt.h>


	  int  DtGroupGetCount(	int shapeID )


     DESCRIPTION
	  DtGroupGetCount() returns the	number of groups in the	shape
	  indicated by shapeID.

	  The polygons in a shape are sorted by	material and placed
	  into groups.	Each shape is made up of one or	more groups
	  depending on the number of materials that are	assigned to
	  the shape.



     OPENMODEL IMPLEMENTATION
	  Alias	polysets are converted to shapes in Dt.	A group	will
	  be generated for each	shader assigned	to the polyset,	the
	  group	sharing	the same vertex	data (see
	  DtShapeGetVertices(3W)) with other groups in the shape but
	  having different material properties.	 A shape will have as
	  many groups as the polyset it	is derived from	had shaders
	  assigned.


     FILES
	  Link with -lDtOMio