Each of these is a single closed polygon of class owin.
bx is a box on [-5,5]^2.
heart is a heart, professing love for all things spatstat.
shp1 is shape of mystery.
shp2 is a slightly more symmetric shape of mystery.
star is a star that shines brightly in even non-spatial contexts.
toywin is the eponymous toy window used in publications e.g. Davies & Lawson (2019).
Details
These are lazy-loaded so may be called directly by name upon loading of spagmix.
References
Davies, T.M. and Lawson, A.B. (2019), An evaluation of likelihood-based bandwidth selectors for spatial and spatiotemporal kernel estimates, Journal of Statistical Computation and Simulation, 89 1131-1152.