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berryFunctions (version 1.22.5)

roundedRect: Rectangles with rounded corners

Description

Draw rectangles with rounded corners via polygon

Usage

roundedRect(
  xleft,
  ybottom,
  xright,
  ytop,
  rounding = 0.25,
  bothsame = TRUE,
  aspcorrect = bothsame,
  devcorrect = bothsame,
  corfactor = 1.3,
  factorpoints = FALSE,
  corners = 1:4,
  npoints = 200,
  plot = TRUE,
  ...
)

Value

Final coordinates, invisible

Arguments

xleft, ybottom, xright, ytop

Single numbers with the outer end locations of the rectangle.

rounding

Proportion of the box to round. Recommended to be between 0 and 1. DEFAULT: 0.25

bothsame

Set the visual amount of rounding to the same in both x and y direction? If TRUE (the default), the proportion relates to the shortest rectangle side. This is visually correct only if aspcorrect and devcorrect are both left at TRUE and corfactor is set correctly. bothsame DEFAULT: TRUE

aspcorrect

Correct for graph aspect ratio? DEFAULT: bothsame

devcorrect

Correct for device aspect ratio? DEFAULT: bothsame

corfactor

Aspect correction factor. I found this by trial and error. More elegant solutions are welcome! DEFAULT 1.3, works well for 7x5 (width x height) graphs

factorpoints

Logical: plot points at inset locations to determine the exact value for corfactor by measuring on screen. DEFAULT: FALSE

corners

Vector with integers indicating which corners to round. Starting bottom left, going clockwise. Zero to suppress rounding. DEFAULT: 1:4

npoints

Total number of vertices for the corners. DEFAULT: 200

plot

Logical. Plot the polygon? FALSE to only compute coordinates. DEFAULT: TRUE

...

Further arguments passed to polygon, like col, border, ...

Author

Berry Boessenkool, berry-b@gmx.de, Dec 2017

See Also

textField

Examples

Run this code
plot(1:10)  ;  rect(4,2,7,8, border=8)
roundedRect(4,2,7,8, rounding=0.1)
roundedRect(4,2,7,8, rounding=0.25) # default
roundedRect(4,2,7,8, rounding=0.5)
roundedRect(4,2,7,8, rounding=-0.1, border="red")
roundedRect(4,2,7,8, rounding=1.1, border="blue")
roundedRect(2,2,8,4, rounding=0.5) # in long boxes, 0.5 is max
roundedRect(2,2,8,4, rounding=0.5, bothsame=FALSE, corfactor=1, border=3)


plot(1:10)  ;  rect(4,2,7,8, border=8)
roundedRect(4,2,7,8, corners=c(2,4))

plot(1:10, asp=1)  ;  rect(4,2,7,8, border=8)
roundedRect(4,2,7,8)
roundedRect(4,2,7,8, aspcorrect=FALSE, border="red") # results depend on asp

plot(1:10, asp=1.5)  ;  rect(4,2,7,8, border=8)
roundedRect(4,2,7,8)
roundedRect(4,2,7,8, aspcorrect=FALSE, border="red") # results depend on asp

plot(1:10, asp=1)  ;  rect(4,2,7,8, border=8)
roundedRect(4,2,7,8) # difference only visible if rect is clearly not a square:
roundedRect(4,2,7,8, bothsame=FALSE, border="red")
roundedRect(4,2,7,8, bothsame=FALSE, aspcorrect=TRUE, border="blue")

if (FALSE)  # aspect correction factor determination
rrtest <- function(...) roundedRect(10,0.5, 35,15, border=2, factorpoints=TRUE)
pdfpng({plot(1:40                     ); rrtest();
        plot(1:40, ylim=c(0,15)       ); rrtest();
        plot(1:40, ylim=c(0,15), asp=1); rrtest();
        roundedRect(2,0, 8,15, factorpoints=TRUE);
        roundedRect(15,10, 25,16, npoints=200)}, 
       file="dummytest", png=F, overwrite=T)

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