Add attributes to a point cloud — add

Modify the memory layout of the point cloud to add an attributes to a point cloud. Values are zeroed: the underlying point cloud is edited to support a new extrabyte attribute. This new attribute can be populated later in another stage

Usage

add_extrabytes(data_type, name, description, scale = 1, offset = 0)

remove_attribute(name)

Arguments

data_type: character. The data type of the extra bytes attribute. Can be "uchar", "char", "ushort", "short", "uint", "int", "uint64", "int64", "float", "double".
name: character. The name of the extra bytes attribute to add or remove to the file.
description: character. A short description of the extra bytes attribute to add to the file (32 characters).
scale, offset: numeric. The scale and offset of the data. See LAS specification. Leave unchanged if not working with LAS files.

Value

This stage transforms the point cloud in the pipeline. It consequently returns nothing.

Examples

f <- system.file("extdata", "Example.las", package = "lasR")
fun <- function(data) { data$RAND <- runif(nrow(data), 0, 100); return(data) }
pipeline <- reader() +
  add_extrabytes("float", "RAND", "Random numbers") +
  callback(fun, expose = "xyz")
exec(pipeline, on = f)
#> NULL