dis_points_to_edges

Compute Distances from Multiple Points to Multiple Edges

Usage

dis_points_to_edges(points, edges)

Arguments

points

A data frame or matrix where each row is a point (2D or 3D).

edges

A list of edge definitions, where each element is a 2-row matrix: row 1 = start, row 2 = end.

Value

A list with two components:

map

Matrix of scalar projection values (t in [0,1]) for each point–edge pair.

dis

Matrix of shortest distances for each point–edge pair.

Details

Computes the distance from each point to each edge, and also returns the scalar projection for each edge to understand where the closest point falls along the segment.

Examples

pts <- data.frame(x = rnorm(3), y = rnorm(3))
edge1 <- matrix(c(0, 0, 1, 1), ncol = 2, byrow = TRUE)
edge2 <- matrix(c(0, 1, 1, 0), ncol = 2, byrow = TRUE)
dists <- dis_points_to_edges(pts, list(edge1, edge2))
str(dists)
#> List of 2
#>  $ map: num [1:3, 1:2] 1.51 1.93 2.4 0.83 2.38 ...
#>  $ dis: num [1:3, 1:2] 0.339 0 0.243 0 0 ...