Request to add roundrect.r option to layout.params

[n8layman]

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It would be very useful to be able to modify the curvature of the tree when using the roundrect layout. For example to add just a little bit of curvature but not as much as is the default. Perhaps by modifying a roundrect.r layout parameter similar to what is available in geom_hilight. Please forgive me if this is already possible, I was unable to find any method after looking through the issues, discussion, google group, or code.

[xiangpin]

you can use shape argument (default is 0.5, should be a numeric vector of values between -1 and 1) to control the radius of the rounded corners when layout='roundrect'.

for example

library(ggtree)
set.seet(123)
tree <- rtree(10)
p1 <- tree |> ggtree(layout='roundrect')
p2 <- tree |> ggtree(layout='roundrect', shape=.25)