Coord1D {affiner} | R Documentation |
1D coordinate vector R6 Class
Description
Coord1D
is an R6::R6Class()
object representing two-dimensional points
represented by Cartesian Coordinates.
Active bindings
xw
A two-column matrix representing the homogeneous coordinates. The first column is the "x" coordinates and the second column is all ones.
x
A numeric vector of x-coordinates.
Methods
Public methods
Method new()
Usage
Coord1D$new(xw)
Arguments
xw
A matrix with three columns representing (homogeneous) coordinates. The first column represents x coordinates and the last column is all ones. Column names should be "x" and "w".
Method print()
Usage
Coord1D$print(n = NULL, ...)
Arguments
n
Number of coordinates to print. If
NULL
print all of them....
Passed to
format.default()
.
Method project()
Usage
Coord1D$project(point = as_point1d("origin"), ...)
Arguments
point
A Point1D object of length one representing the point you with to reflect across or project to or an object coercible to one by
as_point1d(point, ...)
such as "origin"....
Passed to
project1d()
.
Method reflect()
Usage
Coord1D$reflect(point = as_point1d("origin"), ...)
Arguments
point
A Point1D object of length one representing the point you with to reflect across or project to or an object coercible to one by
as_point1d(point, ...)
such as "origin"....
Passed to
reflect1d()
.
Method scale()
Usage
Coord1D$scale(x_scale = 1)
Arguments
x_scale
Scaling factor to apply to x coordinates
Method translate()
Usage
Coord1D$translate(x = as_coord1d(0), ...)
Arguments
Method transform()
Usage
Coord1D$transform(mat = transform1d())
Arguments
mat
A 2x2 matrix representing a post-multiplied affine transformation matrix. The last column must be equal to
c(0, 1)
. If the last row isc(0, 1)
you may need to transpose it to convert it from a pre-multiplied affine transformation matrix to a post-multiplied one. If a 1x1 matrix we'll quietly add a final column/row equal toc(0, 1)
.
Method clone()
The objects of this class are cloneable with this method.
Usage
Coord1D$clone(deep = FALSE)
Arguments
deep
Whether to make a deep clone.
Examples
p <- as_coord1d(x = rnorm(100, 2))
print(p, n = 10L)
pc <- mean(p) # Centroid
# method chained affine transformation matrices are auto-pre-multiplied
p$
translate(-pc)$
reflect("origin")$
print(n = 10L)