OpenRepGrid (version 0.1.14)

calcCoordsBorders: Coordinates of a surrounding rectangle in direction of a given vector.

Description

An arbitrary numeric vector in 2D is to be extended so it will end on the borders of a surrounding rectangle of a given size. Currently the vector is supposed to start in the origin c(0,0).

Usage

calcCoordsBorders(x, y, xmax = 1, ymax = 1, cx = 0, cy = 0)

Value

a dataframe containing the x and y coordinates for the extended vectors.

Arguments

x

numeric vector of x coordinates x coordinates.

y

numeric vector of y coordinates x coordinates.

xmax

maximal x value for surrounding rectangle (default is 1).

ymax

maximal y value for surrounding rectangle (default is 1).

cx

center of rectangle in x direction (not yet supported).

cy

center of rectangle in x direction (not yet supported).

Examples

if (FALSE) {
  calcCoordsBorders(1:10, 10:1)

  x <- c(-100:0, 0:100, 100:0, 0:-100)/10
  y <- c(0:100, 100:0, -(0:100), -(100:0))/10
  xy1 <- calcCoordsBorders(x, y)
  xy2 <- calcCoordsBorders(x, y, xm=1.2, ym=1.2)
  plot(xy2[,1], xy2[,2], type="n")
  segments(xy1[,1],xy1[,2],xy2[,1], xy2[,2])
}