R Under development (unstable) (2024-07-05 r86875 ucrt) -- "Unsuffered Consequences"
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> library(rgl)
> 
> ## a function to plot good-looking spheres
> 
> sphere1.f <- function(x0 = 0, y0 = 0, z0 = 0, r = 1, n = 101, ...){
+   f <- function(s,t){ 
+     cbind(   r * cos(t)*cos(s) + x0,
+              r *        sin(s) + y0,
+              r * sin(t)*cos(s) + z0)
+   }
+   
+   persp3d(f, slim = c(-pi/2,pi/2), tlim = c(0, 2*pi), n = n, add = T,  ...)
+ }
> 
> ## a set of 3D coordinates for my spheres
> 
> agg <- as.data.frame(list(x = c(-0.308421860438279, -1.42503395393061), y = c(0.183223776337368, 1.69719822686475), z = c(-0.712687792799106, -0.0336746884947792)))
> 
> open3d()
wgl 
  1 
> 
> ##material and light effects for the spheres
> 
> clear3d(type = "lights")
> light3d(theta = -30, phi = 60, viewpoint.rel = TRUE, ambient = "#FFFFFF", diffuse = "#FFFFFF", specular = "#FFFFFF", x = NULL, y = NULL, z = NULL)
> 
> ## plot the spheres.
> sphere <- sphere1.f(r=0.5)
> sprites <- sprites3d(agg, radius = 0.5, shapes = sphere,
+           rotating = TRUE)
> 
> rglwidget()
> 
> proc.time()
   user  system elapsed 
   1.54    0.21    1.76