curve_it: 'Curvify' polygon-based objects.
In chrisbrunsdon/caricRture: 'Sketchy' style maps with R

Description Usage Arguments Details Value Examples

Curved caracture from a SpatialPolygons or SpatialPolygonsDataFrame object, controlled by a shape parameter. This can pass through the nodes of the original object (-1 < shape parameter < 0) or go near to them (0 < shape parameter < 1).

1 2	curve_it(spdf,s) spdf

`s`	`shape` parameter as in xspline
`spdf`	a SpatialPolygons or SpatialPolygonsDataFrame object

This is based on the xspline function. In particular, the shape parameter is the same as in that function.

a SpatialPolygons curved caricature

'indianred' %>% adjustcolor(alpha.f=0.3) -> ired
"POLYGON((0 0,0 2,1 3.5,3 3,4 1,3 0,0 0))" %>% readWKT -> p1
p1 %>% make_canvas %>% plot_it(col=ired)
p1 %>% curve_it(1) %>% plot_it(col=ired,lty=2)
p1 %>% curve_it(0.5) %>% plot_it(col=ired,lty=2)