Convert an object to triangles

This generic and its methods extract or creates a matrix of coordinates of triangles from an object, suitable for passing to triangles3d.

as.triangles3d(obj, ...)
# S3 method for rglId
as.triangles3d(obj,
               attribute = c("vertices", "normals", "texcoords", "colors"),
               subscene = NA,
               ...)

Arguments

obj

The object to convert.

attribute

Which attribute of an RGL object to extract?

subscene

Which subscene is this object in?

...

Additional arguments used by the methods.

Details

The method for "rglId" objects can extract several different attributes, organizing them as it would organize the vertices for the triangles.

Value

An n x 3 matrix containing the vertices of triangles making up the object. Each successive 3 rows of the matrix corresponds to a triangle.

If the attribute doesn't exist, NULL will be returned.

Author

Duncan Murdoch

See also

as.mesh3d to also capture material properties.

Examples

open3d()
x <- surface3d(x = 1:10, y = 1:10, z = rnorm(100), col = "red")
tri <- as.triangles3d(x)
open3d()
triangles3d(tri, col = "blue")