tf_affine: Affine Transformation

In zzwch/crosslink: Visualize the Network of Grouped Nodes

Affine Transformation

Description

Wrapper functions for transformations, rotate: tf_rotate, flip: tf_flip, shift: tf_shift shear: tf_shear, scale: tf_scale and tf_scale_xy

Usage

tf_affine(
  object,
  type = c("none", "translate", "scale", "rotate", "shear", "reflect"),
  by.each.cross = F,
  x = 0,
  y = 0,
  angle = NA,
  scale.x = NA,
  scale.y = NA,
  counterclockwise = FALSE,
  relative = T,
  crosses = NULL,
  layout = "transforming"
)

tf_rotate(object, x = 0, y = 0, angle = 90, ...)

tf_flip(object, axis = c("x", "y"), ...)

tf_shift(object, x = 0, y = 0, ...)

tf_shear(object, axis = c("x", "y"), angle = 15, ...)

tf_scale(object, x = 0, y = 0, scale.x = 1, scale.y = 1, ...)

Arguments

object	a CrossLink object
type	affine type
by.each.cross	transformation to be performed by each cross
x, y	coordiantes of transformation center for tf_rotate; offset in x,y axies for tf_shift; scale about this position for tf_scale; scale x and y along x, y axies, respectively, for tf_scale_xy
angle	transformation angle in degree
scale.x, scale.y	scale size for type scale
counterclockwise	angle in counterclockwise for transformation
relative	x,y is relative coordinates in range c(0,1)
crosses	only these crosses will be transformed
layout	layout name to save
...	other parameters passed to tf_affine
axis	along which axis to flip or shear

Details

learn more about 2D affine and perspective tranformation matrix:

• https://en.wikipedia.org/wiki/Transformation_matrix

• https://www.cnblogs.com/bnuvincent/p/6691189.html

• Rconic::`Affine planar transformations matrix`

Value

an updated CrossLink object

zzwch/crosslink documentation built on Aug. 27, 2023, 5:57 p.m.