predicates

Measurements and queries on paths.

Imports

import {
  area, areaGroup, ringArea, centroid, containsPoint,
  bounds, width, height, areaSimilarity, predicates,
} from 'pattapatta'

Functions

Function	Description
area(path)	Absolute area (holes subtracted)
areaGroup(group)	Sum of path areas
ringArea(ring)	Signed shoelace
centroid(path)	Exterior centroid
containsPoint(path, p)	Point-in-polygon with holes
bounds(path)	Axis-aligned bounds
width / height	Bound extents
areaSimilarity(a, b)	1 - \|Δarea\| / max

Example

const sq = createRect(0, 0, 10, 10)
area(sq) // 100
containsPoint(sq, vec2(5, 5)) // true