## ----include = FALSE----------------------------------------------------------
knitr::opts_chunk$set(
    collapse = TRUE,
    comment = "#>"
)

## ----setup--------------------------------------------------------------------
library(alcyon)

lineStringMap <- st_read(
    system.file(
        "extdata", "testdata", "gallery",
        "gallery_lines.mif",
        package = "alcyon"
    ),
    geometry_column = 1L, quiet = TRUE
)

shapeMap <- as(lineStringMap[, vector()], "ShapeMap")

## -----------------------------------------------------------------------------
isovistMap <- isovist(
    shapeMap,
    x = c(3.01),
    y = c(6.70),
    angle = 0.01,
    viewAngle = 3.14,
    FALSE
)

## -----------------------------------------------------------------------------
plot(isovistMap[1, 1])