R Under development (unstable) (2024-01-07 r85787 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> library(RTriangle)
> p <- pslg(P=rbind(c(0, 0), c(0, 1), c(0.5, 0.5), c(1, 1), c(1, 0)),
+           S=rbind(c(1, 2), c(2, 3), c(3, 4), c(4, 5), c(5, 1)))
> tp <- triangulate(p)
> print(tp)
$P
     [,1] [,2]
[1,]  0.0  0.0
[2,]  0.0  1.0
[3,]  0.5  0.5
[4,]  1.0  1.0
[5,]  1.0  0.0

$PB
     [,1]
[1,]    1
[2,]    1
[3,]    1
[4,]    1
[5,]    1

$PA
    
[1,]
[2,]
[3,]
[4,]
[5,]

$T
     [,1] [,2] [,3]
[1,]    2    1    3
[2,]    3    5    4
[3,]    5    3    1

$S
     [,1] [,2]
[1,]    1    2
[2,]    3    2
[3,]    4    3
[4,]    4    5
[5,]    5    1

$SB
     [,1]
[1,]    1
[2,]    1
[3,]    1
[4,]    1
[5,]    1

$E
     [,1] [,2]
[1,]    2    1
[2,]    1    3
[3,]    3    2
[4,]    3    5
[5,]    5    4
[6,]    4    3
[7,]    1    5

$EB
     [,1]
[1,]    1
[2,]    0
[3,]    1
[4,]    0
[5,]    1
[6,]    1
[7,]    1

$VP
     [,1] [,2]
[1,]  0.0  0.5
[2,]  1.0  0.5
[3,]  0.5  0.0

$VE
     [,1] [,2]
[1,]    1   -1
[2,]    1    3
[3,]    1   -1
[4,]    2    3
[5,]    2   -1
[6,]    2   -1
[7,]    3   -1

$VN
     [,1] [,2]
[1,] -1.0  0.0
[2,]  0.0  0.0
[3,]  0.5  0.5

$VA
    
[1,]
[2,]
[3,]

$NB
     [,1] [,2] [,3]
[1,]    3   -1   -1
[2,]   -1   -1    3
[3,]    1   -1    2

attr(,"class")
[1] "triangulation"
> 
> proc.time()
   user  system elapsed 
   0.10    0.04    0.15