Description Usage Arguments Details Value Author(s) See Also Examples
View source: R/as.mesh3d.default.R
This method attempts to read the attributes of objects in the rgl display and construct a mesh3d object to approximate them.
1 2 |
x |
A vector of rgl identifiers of objects in the specified subscene. |
type |
A vector of names of types of shapes to convert. Other shapes will be ignored. |
subscene |
Which subscene to look in; the default |
... |
Ignored. |
This function attempts to construct a triangle mesh to approximate
one or more objects from the current display. It can only handle objects of types from c("triangles", "quads", "planes", "surface")
.
Since this method only produces triangular meshes, they won't necessarily be an exact match to the original object.
If the generic as.mesh3d
is called with no x
argument, this method will be called with x
set to the
ids in the current scene.
A triangular mesh object.
Duncan Murdoch
as.triangles3d.rglId
for extracting the triangles,
clipMesh3d
to apply complex clipping to a mesh object.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | # volcano example taken from "persp"
#
data(volcano)
z <- 2 * volcano # Exaggerate the relief
x <- 10 * (1:nrow(z)) # 10 meter spacing (S to N)
y <- 10 * (1:ncol(z)) # 10 meter spacing (E to W)
zlim <- range(y)
zlen <- zlim[2] - zlim[1] + 1
colorlut <- terrain.colors(zlen) # height color lookup table
col <- colorlut[ z - zlim[1] + 1 ] # assign colors to heights for each point
open3d(useNULL = TRUE)
surface3d(x, y, z, color = col)
m <- as.mesh3d()
close3d()
open3d()
shade3d(m)
|
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