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How plotly package in R creates solid 3D mesh from vertex information without face information
I have 3D vertex coordinates (vb.xlsx) and face information (it.xlsx) for human face available here. I managed to plot 3D surface mesh with rgl package by providing both vertex and face information (see here). What surprised me is that with plotly package in R, I can get solid 3D surface mesh of human face only by providing vertex data, where face information is unnecessary. Below is my R code to generate the surface mesh:
library(plotly)
library(xlsx)
vb <- read.xlsx("E:\Research\GM\3D started\Spatially dense\Point cloud to mesh\vb.xlsx", sheetIndex = 1, header = F)
Sys.setenv("plotly_username"="<MY USER NAME>")
Sys.setenv("plotly_api_key"="<MY KEY>")
face <- plot_ly(
x = vb[,1], y = vb[,2], z = vb[,3], # Note only vertex provided
type = "mesh3d"
)
face
The resultant surface mesh is as follows:
My question is how does plotly managed to generate 3D surface mesh without face information? Can anyone show me the magic code under the hood so that I could do the same thing outside plotly with some self-written code?
Thank you.
r 3d plotly r-plotly
edited Jan 2 at 16:03
user2554330
9,81211241
asked Jan 1 at 15:35
PatrickPatrick
1189
add a comment |
I have 3D vertex coordinates (vb.xlsx) and face information (it.xlsx) for human face available here. I managed to plot 3D surface mesh with rgl package by providing both vertex and face information (see here). What surprised me is that with plotly package in R, I can get solid 3D surface mesh of human face only by providing vertex data, where face information is unnecessary. Below is my R code to generate the surface mesh:
library(plotly)
library(xlsx)
vb <- read.xlsx("E:\Research\GM\3D started\Spatially dense\Point cloud to mesh\vb.xlsx", sheetIndex = 1, header = F)
Sys.setenv("plotly_username"="<MY USER NAME>")
Sys.setenv("plotly_api_key"="<MY KEY>")
face <- plot_ly(
x = vb[,1], y = vb[,2], z = vb[,3], # Note only vertex provided
type = "mesh3d"
)
face
The resultant surface mesh is as follows:
My question is how does plotly managed to generate 3D surface mesh without face information? Can anyone show me the magic code under the hood so that I could do the same thing outside plotly with some self-written code?
Thank you.
r 3d plotly r-plotly
edited Jan 2 at 16:03
user2554330
9,81211241
asked Jan 1 at 15:35
PatrickPatrick
1189
1
This is documented on the plotly help page plot.ly/r/reference/#mesh3d: it can do Delaunay triangulation (likergl::persp3d.deldir) or the "alpha-shape" algorithm (which isn't supported byrgl).
– user2554330
Jan 1 at 17:26
Thealphashape3dpackage does the "alpha-shape" algorithm, and has aplotmethod usingrgl.
– user2554330
Jan 1 at 17:48
add a comment |
I have 3D vertex coordinates (vb.xlsx) and face information (it.xlsx) for human face available here. I managed to plot 3D surface mesh with rgl package by providing both vertex and face information (see here). What surprised me is that with plotly package in R, I can get solid 3D surface mesh of human face only by providing vertex data, where face information is unnecessary. Below is my R code to generate the surface mesh:
library(plotly)
library(xlsx)
vb <- read.xlsx("E:\Research\GM\3D started\Spatially dense\Point cloud to mesh\vb.xlsx", sheetIndex = 1, header = F)
Sys.setenv("plotly_username"="<MY USER NAME>")
Sys.setenv("plotly_api_key"="<MY KEY>")
face <- plot_ly(
x = vb[,1], y = vb[,2], z = vb[,3], # Note only vertex provided
type = "mesh3d"
)
face
The resultant surface mesh is as follows:
My question is how does plotly managed to generate 3D surface mesh without face information? Can anyone show me the magic code under the hood so that I could do the same thing outside plotly with some self-written code?
Thank you.
r 3d plotly r-plotly
edited Jan 2 at 16:03
user2554330
9,81211241
asked Jan 1 at 15:35
PatrickPatrick
1189
I have 3D vertex coordinates (vb.xlsx) and face information (it.xlsx) for human face available here. I managed to plot 3D surface mesh with rgl package by providing both vertex and face information (see here). What surprised me is that with plotly package in R, I can get solid 3D surface mesh of human face only by providing vertex data, where face information is unnecessary. Below is my R code to generate the surface mesh:
library(plotly)
library(xlsx)
vb <- read.xlsx("E:\Research\GM\3D started\Spatially dense\Point cloud to mesh\vb.xlsx", sheetIndex = 1, header = F)
Sys.setenv("plotly_username"="<MY USER NAME>")
Sys.setenv("plotly_api_key"="<MY KEY>")
face <- plot_ly(
x = vb[,1], y = vb[,2], z = vb[,3], # Note only vertex provided
type = "mesh3d"
)
face
The resultant surface mesh is as follows:
My question is how does plotly managed to generate 3D surface mesh without face information? Can anyone show me the magic code under the hood so that I could do the same thing outside plotly with some self-written code?
Thank you.
r 3d plotly r-plotly
r 3d plotly r-plotly
edited Jan 2 at 16:03
user2554330
9,81211241
asked Jan 1 at 15:35
PatrickPatrick
1189
edited Jan 2 at 16:03
user2554330
9,81211241
asked Jan 1 at 15:35
PatrickPatrick
1189
edited Jan 2 at 16:03
user2554330
9,81211241
edited Jan 2 at 16:03
user2554330
9,81211241
edited Jan 2 at 16:03
user2554330
9,81211241
9,81211241
asked Jan 1 at 15:35
PatrickPatrick
1189
asked Jan 1 at 15:35
PatrickPatrick
1189
asked Jan 1 at 15:35
PatrickPatrick
1189
1189
1
This is documented on the plotly help page plot.ly/r/reference/#mesh3d: it can do Delaunay triangulation (likergl::persp3d.deldir) or the "alpha-shape" algorithm (which isn't supported byrgl).
– user2554330
Jan 1 at 17:26
Thealphashape3dpackage does the "alpha-shape" algorithm, and has aplotmethod usingrgl.
– user2554330
Jan 1 at 17:48
add a comment |
1
This is documented on the plotly help page plot.ly/r/reference/#mesh3d: it can do Delaunay triangulation (likergl::persp3d.deldir) or the "alpha-shape" algorithm (which isn't supported byrgl).
– user2554330
Jan 1 at 17:26
Thealphashape3dpackage does the "alpha-shape" algorithm, and has aplotmethod usingrgl.
– user2554330
Jan 1 at 17:48
1
1
This is documented on the plotly help page plot.ly/r/reference/#mesh3d: it can do Delaunay triangulation (like
rgl::persp3d.deldir) or the "alpha-shape" algorithm (which isn't supported by rgl).– user2554330
Jan 1 at 17:26
This is documented on the plotly help page plot.ly/r/reference/#mesh3d: it can do Delaunay triangulation (like
rgl::persp3d.deldir) or the "alpha-shape" algorithm (which isn't supported by rgl).– user2554330
Jan 1 at 17:26
The
alphashape3d package does the "alpha-shape" algorithm, and has a plot method using rgl.– user2554330
Jan 1 at 17:48
The
alphashape3d package does the "alpha-shape" algorithm, and has a plot method using rgl.– user2554330
Jan 1 at 17:48
add a comment |
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1
This is documented on the plotly help page plot.ly/r/reference/#mesh3d: it can do Delaunay triangulation (like
rgl::persp3d.deldir) or the "alpha-shape" algorithm (which isn't supported byrgl).– user2554330
Jan 1 at 17:26
The
alphashape3dpackage does the "alpha-shape" algorithm, and has aplotmethod usingrgl.– user2554330
Jan 1 at 17:48