const mat4 = require('../../maths/mat4')
/**
* Represents a 3D geometry consisting of a list of polygons.
* @typedef {Object} geom3
* @property {Array} polygons - list of polygons, each polygon containing three or more points
* @property {mat4} transforms - transforms to apply to the polygons, see transform()
*/
/**
* Create a new 3D geometry composed of the given polygons.
* @param {Array} [polygons] - list of polygons, or undefined
* @returns {geom3} a new geometry
* @alias module:modeling/geometries/geom3.create
*/
const create = (polygons) => {
if (polygons === undefined) {
polygons = [] // empty contents
}
return {
polygons,
transforms: mat4.create()
}
}
module.exports = create