Load a matrix for later use — load

Load a matrix for later use. For example, load a matrix to feed the transform_with stage

Usage

load_matrix(matrix)

Arguments

matrix: a 4x4 matrix typically a Rotation-Translation Matrix (RTM)

Examples

a = 20 * pi / 180
m <- matrix(c(
  cos(a), -sin(a), 0, 1000,
  sin(a), cos(a), 0, 0,
  0, 0, 1, 0,
  0, 0, 0, 1), nrow = 4, byrow = TRUE)

mat = load_matrix(m)
trans = transform_with(mat)
write = write_las(tempfile(fileext = ".las"))
pipeline = mat + trans + write

f <- system.file("extdata", "Topography.las", package="lasR")

exec(pipeline, on = f)
#> $load_matrix
#>           [,1]       [,2] [,3] [,4]
#> [1,] 0.9396926 -0.3420201    0 1000
#> [2,] 0.3420201  0.9396926    0    0
#> [3,] 0.0000000  0.0000000    1    0
#> [4,] 0.0000000  0.0000000    0    1
#> 
#> $write_las
#> [1] "/tmp/RtmpNwgKVd/file246bd175da0.las"
#>