doRectanglesOverlap: Detect if two rectangles overlap.

Description Usage Arguments Value Examples

View source: R/repgrid-plots.r

Description

The overlap is assessed in x AND y.

Usage

1
doRectanglesOverlap(a, b, margin = 0)

Arguments

a

vector with four coordinates c(x0,y0,x1,y1).

b

vector with four coordinates c(x0,y0,x1,y1).

Value

logical. TRUE if rectangles overlap.

Examples

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
## Not run: 
  #overlap in x and y
  a <- c(0,0,2,2)
  b <- c(1,1,4,3)
  plot(c(a,b), c(a,b), type="n")
  rect(a[1], a[2], a[3], a[4])
  rect(b[1], b[2], b[3], b[4])
  doRectanglesOverlap(a,b)

  # b contained in a vertically
  a <- c(5,0,20,20)
  b <- c(0, 5,15,15)
  plot(c(a,b), c(a,b), type="n")
  rect(a[1], a[2], a[3], a[4])
  rect(b[1], b[2], b[3], b[4])
  doRectanglesOverlap(a,b)

  # overlap only in y
  a <- c(0,0,2,2)
  b <- c(2.1,1,4,3)
  plot(c(a,b), c(a,b), type="n")
  rect(a[1], a[2], a[3], a[4])
  rect(b[1], b[2], b[3], b[4])
  doRectanglesOverlap(a,b)

## End(Not run)

markheckmann/OpenRepGrid documentation built on April 30, 2021, 2:33 a.m.