Add a Pre-Triangulated GPU Polygon / MultiPolygon Layer

Triangulates polygons in C++17 (earcut) and streams triangle index buffers and ring outlines directly to WebGL2 vertex buffers (zero JS earcut overhead).

Usage

add_polygons(
  map,
  data = NULL,
  fill_color = "#3b82f6",
  palette = "viridis",
  fill_opacity = 0.7,
  stroke = TRUE,
  line_color = "#e2e8f0",
  line_width = 1,
  extrude = NULL,
  popup = NULL,
  label = NULL,
  id = NULL,
  group = NULL,
  legend = TRUE
)

Arguments

map: A glmap widget or glmap_proxy.
data: An sf, sfc, or data.frame object.
fill_color: Fill color aesthetic (color string, formula ~col, or column name).
palette: Color palette name ("viridis", "plasma", "magma", "turbo", "Spectral", etc.).
fill_opacity: Polygon fill opacity (0 to 1).
stroke: Logical; whether to draw a crisp anti-aliased stroke around each point.
line_color: Border line color string (default "#ffffff").
line_width: Border line width in pixels (default 1.0).
extrude: Optional 3D extrusion height aesthetic (formula ~height, column name, or numeric).
popup: Optional formula (~name), column name, or character vector for click/hover tooltips.
label: Alias for popup.
id: Layer ID string.
group: Layer group name shown in the interactive layer switcher.
legend: Logical; whether to automatically add a legend when color is mapped to data.