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num_points

geometry_algorithm::num_points

Function num_points 

Source 
pub fn num_points<G>(g: &G) -> usize
where
    G: Geometry,
    G::Kind: NumPointsStrategyForKind,
    <G::Kind as NumPointsStrategyForKind>::S: NumPointsStrategy<G>,
Expand description

Total number of points in g.

  • Point → 1
  • Segment → 2 (the two endpoints)
  • Box → 2^D corner points (num_points.hpp:100-101) — 4 in 2D
  • Linestring / Ring → length of the stored point sequence
  • Polygon → exterior + Σ interior ring point counts
  • Multi* → sum over members

Mirrors boost::geometry::num_points(g) from boost/geometry/algorithms/num_points.hpp. The per-kind body is selected by the tag-keyed [NumPointsStrategyForKind] picker, so any concept-adapted foreign type resolves through the same path as the equivalent geometry-model value.