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Combines rigid tranformation matrices

Source: R/SpatialMultiomicAlignment.R
combine.tr.Rd

Combines rigid tranformation matrices in the following order: translation of points to origin (0, 0) -> reflection of points -> rotation by alpha degrees and translation of points to new center

Usage

combine.tr(center.cur, center.new, alpha, mirror.x = FALSE, mirror.y = FALSE)

Arguments

center.cur

(x, y) image pixel coordinates specifying the current center of the tissue (stored in slot "tools" as "centers")

center.new

(x, y) image pixel coordinates specifying the new center (image center)

alpha

Rotation angle

mirror.x, mirror.y

Logical values indicating reflection across the x or y axis before rotation.

Value

A 3-by-3 homogeneous affine-transformation matrix.

Examples

utils::str(formals(combine.tr))
#> Dotted pair list of 5
#>  $ center.cur: symbol 
#>  $ center.new: symbol 
#>  $ alpha     : symbol 
#>  $ mirror.x  : logi FALSE
#>  $ mirror.y  : logi FALSE
transformation <- combine.tr(
  center.cur = c(0, 0),
  center.new = c(10, 20),
  alpha = 90
)
stopifnot(identical(dim(transformation), c(3L, 3L)))