@jscad/modeling
Version:
Constructive Solid Geometry (CSG) Library for JSCAD
18 lines (16 loc) • 445 B
JavaScript
/**
* Calculate the area under the given points.
* @param {Array} points - list of 2D points
* @return {Number} area under the given points
* @alias module:modeling/maths/utils.area
*/
const area = (points) => {
let area = 0
for (let i = 0; i < points.length; i++) {
const j = (i + 1) % points.length
area += points[i][0] * points[j][1]
area -= points[j][0] * points[i][1]
}
return (area / 2.0)
}
module.exports = area