isovist2pts: Create isovists using two points

In alcyon: Spatial Network Analysis

Create isovists using two points

Description

Create one or more isovists at particular points, given another point for direction and an angle for field of view

Usage

isovist2pts(boundaryMap, x, y, toX, toY, viewAngle, verbose = FALSE)

Arguments

boundaryMap	A ShapeMap with lines designating the isovist boundaries
x	X coordinate of the origin points
y	Y coordinate of the origin points
toX	X coordinate of the target points
toY	Y coordinate of the target points
viewAngle	The angle signifying the isovist's field of view
verbose	Optional. Show more information of the process.

Value

A ShapeMap with the isovist polygons

Examples

mifFile <- system.file(
    "extdata", "testdata", "simple",
    "simple_interior.mif",
    package = "alcyon"
  )
  sfMap <- st_read(mifFile,
    geometry_column = 1L, quiet = TRUE
  )
  shapeMap <- as(sfMap[, vector()], "ShapeMap")
isovist2pts(
  shapeMap,
  x = c(3.01, 1.3),
  y = c(6.70, 5.2),
  toX = c(3.40, 1.1),
  toY = c(6.50, 5.6),
  viewAngle = 3.14,
  FALSE
)

alcyon documentation built on April 3, 2025, 6:18 p.m.