OpenRepGrid (version 0.1.16)

doRectanglesOverlap: Detect if two rectangles overlap.

Description

The overlap is assessed in x AND y.

Usage

doRectanglesOverlap(a, b, margin = 0)

Value

logical. TRUE if rectangles overlap.

Arguments

a

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

b

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

Examples

if (FALSE) {
# 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)
}