# persp3d.deldir

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##### Plot a Delaunay triangulation.

The deldir() function in the deldir package computes a Delaunay triangulation of a set of points. These functions display it as a surface.

Keywords
Graphics
##### Usage
# S3 method for deldir
plot3d(x, ...)
# S3 method for deldir
# S3 method for deldir
as.mesh3d(x, col = "gray", coords = c("x", "y", "z"),
smooth = TRUE, normals = NULL, texcoords = NULL, ...)
##### Arguments
x

A "deldir" object, produced by the deldir() function. It must contain z values.

Whether to add surface to existing plot (add = TRUE) or create a new plot (add = FALSE, the default).

col

Colors to apply to each vertex in the triangulation. Will be recycled as needed.

coords

See Details below.

smooth

Whether to average normals at vertices for a smooth appearance.

normals

User-specified normals at each vertex. Requires smooth = FALSE.

texcoords

Texture coordinates at each vertex.

...

See Details below.

##### Details

These functions construct a mesh3d object corresponding to the triangulation in x. The plot3d and persp3d methods plot it.

The coords parameter allows surfaces to be plotted over any coordinate plane. It should be a permutation of the column names c("x", "y", "z") from the "deldir" object. The first will be used as the x coordinate, the second as the y coordinate, and the third as the z coordinate.

The ... parameters in plot3d.deldir are passed to persp3d.deldir; in persp3d.deldir they are passed to both as.mesh3d.deldir and persp3d.mesh3d; in as.mesh3d.deldir they are used as material parameters in a tmesh3d call.

##### Aliases
• persp3d.deldir
• plot3d.deldir
• as.mesh3d.deldir
##### Examples
# NOT RUN {
x <- rnorm(200, sd = 5)
y <- rnorm(200, sd = 5)
r <- sqrt(x^2 + y^2)
z <- 10 * sin(r)/r
col <- cm.colors(20)[1 + round(19*(z - min(z))/diff(range(z)))]

if (requireNamespace("deldir", quietly = TRUE)) {
save <- options(rgl.meshColorWarning = FALSE)
dxyz <- deldir::deldir(x, y, z = z, suppressMsge = TRUE)
persp3d(dxyz, col = col)
open3d()
# Do it without smoothing and with a different orientation.
persp3d(dxyz, col = col, coords = c("z", "x", "y"), smooth = FALSE)
options(save)
}
# }

Documentation reproduced from package rgl, version 0.100.50, License: GPL

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