If two geometries are parallel they have the same orientation. euclid allows
assessing parallelity of a broad range of geometries. If `x`

and `y`

are
surfaces the parallelity of their supporting plane is returned. If `x`

and
`y`

are curves, the parallelity of their supporting line is returned. If it
is a mix of surface and curve, the parallelity is calculated as whether the
supporting plane and supporting line intersects at a point.

parallel(x, y)

x, y | vectors of geometries |
---|

a logical vector giving the parallelity of the input

# Are two triangles parallel (only meaningful in 3D) p <- point(sample(20, 6), sample(20, 6), sample(20, 6)) t1 <- triangle(p[1], p[2], p[3]) t2 <- triangle(p[4], p[5], p[6]) parallel(t1, t2)#> [1] FALSE#> [1] FALSE#> [1] FALSE