RELEASE NOTES 

		spatstat 1.14-0

		22 July 2008 
	
OVERVIEW
	New class of 'tessellations'.
	Simulation of hybrid Geyer point process model is now supported.

DEPENDENCE 
	spatstat now depends on the package 'deldir'.

NEW CLASS

	There is a new class "tess" of tessellations.
	A tessellation is a list of disjoint windows that 
	fit together to form a larger window.

	tess
		Creates a tessellation

	plot.tess
		Plots a tessellation

	tiles
		Extracts a list of tiles in the tessellation

	[.tess, [<-.tess
		Extract or replace some of the tiles 

NEW FUNCTIONS

	dirichlet
		Computes the Dirichlet tessellation of a point pattern

	by.ppp
		A method for the generic 'by' for point patterns.
		Applies a chosen function to subsets of a point pattern
		determined by a factor or a tessellation.

IMPROVEMENTS/ENHANCEMENTS

	split.ppp  
	cut.ppp  
		These now accept a tessellation as the grouping factor.

	rmh.default
	rmhmodel.default
	rmhmodel.ppm
		Metropolis-Hastings simulation of the hybrid Geyer
		point process (cif='badgey' or interaction = BadGey())
		is now supported.

	plot.splitppp
		New argument main.panel controls the heading for each panel.

	plot.kppm
		Now handles 'main' and other graphical parameters.

BUGS

	[1] union.owin, gpc2owin
		Crashed in rare cases, with a complaint
		about overlapping windows.
		Fixed.