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Large mesh3d plot is not displayed with R-4.4.0

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#2,352 2 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
r

Research direction

Start with the provided R reproduction using plotly, rmarchingcubes, and a mesh3d trace, comparing n = 100 with n = 50 under R 4.4.0. Investigate why the larger mesh produces a blank viewer, and verify completion when the n = 100 example renders the expected plot without changing the reported setup.

Written by the indexing model from the issue text.

Description

Hello,

Since I upgraded R to version 4.4.0, my mesh3d plot no longer appears. The viewer renders a blank page. This mesh is large and if I reduce it then it appears.

library(plotly)
library(rmarchingcubes)

R <- 2
f1 <- function(x, y, z){
  x^2 + y^2 + z^2 - R^2
}
f2 <- function(x, y, z){
  (x-2)^2 + (y-2)^2 + (z-2)^2 - R^2
}
g <- function(x, y, z) {
  pmax(f1(x, y, z), f2(x, y, z))
}

n <- 100
x_ <- y_ <- z_ <- seq(-R, R, length.out = n) 
Grid <- expand.grid(X = x_, Y = y_, Z = z_)
voxel <- with(Grid, array(g(X, Y, Z), dim = c(n, n, n)))
surf <- contour3d(voxel, level = 0, x_, y_, z_)
vertices <- surf$vertices
indices  <- surf$triangles - 1L

plot_ly(
  x = vertices[, 1], y = vertices[, 2], z = vertices[, 3],
  i = indices[, 1], j = indices[, 2], k = indices[, 3],
  type = "mesh3d"
) %>% layout(scene = list(aspectmode = "data"))

If you replace n <- 100 with n <- 50 then the expected plot appears.

Dominant language
R
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