Tools for exploring the topography of 3d triangle meshes.
The functions were developed with dental surfaces in mind, but could be
applied to any triangle mesh of class 'mesh3d'. More specifically, 'doolkit'
allows to isolate the border of a mesh, or a subpart of the mesh using the
polygon networks method; crop a mesh; compute basic descriptors (elevation,
orientation, footprint area); compute slope, angularity and relief index
(Ungar and Williamson (2000) < https://palaeo-electronica.org/2000_1/gorilla/issue1_00.htm>;
Boyer (2008)
The doolkit package provides functions to explore the topography of 3d triangle meshes. It was developed with dental surfaces in mind, but could be applied to any triangle mesh of class ‘mesh3d’. The package aims to group all the methods associated to dental topography within the same toolkit. New methods could be included and shall be introduced in later versions of the package.
You can install the released version of doolkit from CRAN with:
install.packages("doolkit")
library(doolkit)
#Import surfaces
#PLY <- Rvcg::vcgImport(choose.files(), updateNormals = TRUE, clean = TRUE, silent = TRUE)
PLY <- dkpongo$OES
#Computation
Area <- round(Rvcg::vcgArea(PLY), digits = 2)
#...relief
Gamma <- round(rfi(PLY, method = "Guy"), digits = 2)
Rfi <- round(rfi(PLY, method = "Ungar"), digits = 2)
Lrfi <- round(rfi(PLY, method = "Boyer"), digits = 2)
Slope <- round(mean(slope(PLY)), digits = 2)
#...sharpness
ARC <- arc(PLY)
Arc <- round(mean(ARC), digits = 3)
Parc <- round(mean(ARC[ARC >= 0]), digits = 3)
Narc <- round(mean(ARC[ARC < 0]), digits = 3)
Dne <- round(dne(PLY, total = TRUE), digits = 2)
#...complexity
Opcr <- round(opcr(PLY)$opcr, digits = 1)
#...shape indices
FormFactor <- round(shape.index(PLY)$FormFactor, digits = 3)
Elongation <- round(shape.index(PLY)$Elongation, digits = 3)
K <- round(shape.index(PLY)$K, digits = 3)
#Maps
#...relief
dkmap(dkpongo$OES, doolkit::elev(dkpongo$OES), col = "elev", legend.lab = "Elevation (mm)")
dkmap(dkpongo$OES, doolkit::slope(dkpongo$OES), col.levels = 9, col = "slope", legend.lab = "Slope (degrees)", min.range = 0, max.range = 90)
#...orientation
dkmap(dkpongo$OES, orient(dkpongo$OES), col.levels = 8, col = "orient", legend.lab = "Orientation (degrees)",legend.type = "pie", min.range = 0, max.range = 360)
#...sharpness
dkmap(dkpongo$OES, doolkit::arc(dkpongo$OES), col = "arc", legend.lab = "ARC", min.range = -20, max.range = 20, col.levels = 15)
dkmap(dkpongo$OES, doolkit::dne(dkpongo$OES), col = "dne", legend.lab = "DNE", legend.type = "log")