Allow creation of Polygon from a Nested Array of Points

[frastlin]

I have a number of arrays, such as [[1,1], [1,2], [2,2], [2,1]], and [[[1,1],[1,3],[2,3],[2,1]], [[2,2], [2,3], [4,3], [4,2]]].
That describe a single polygon and multipolygon respectively. The first function I need to add for any project I have is the code to convert from the nested points, to the Flatten polygons.
If there could be a function that would do this for me, it would make the library much easier to work with when implementing into a new project.

[alexbol99]

But this convert is pretty straightforward:

  let array = [[[1,1],[1,3],[2,3],[2,1]], [[2,2], [2,3], [4,3], [4,2]]];
  const polygon = new Polygon();
  for (let points of array) {
    let face = polygon.addFace(points.map(([x, y]) => new Point(x, y)));    
  }

Do you think it is not enough?

[frastlin]

That doesn't work for both. The point is though, that this is probably an extremely common process, so there should be a method to handle it so the load to switch to Flatten is even easier. Here is my code:

shapeafy(poly, shape=null){
	//only pass in a multi-level array for poly, don't pass in shape. it returns the Flatten.js polygon object
	if(!shape){
		shape = new Polygon()
	}
	if(poly[0][0].length === undefined){
		const face = poly.map(p=> new Point(p))
		shape.addFace(face)
	} else {
		poly.forEach(arr=>this.shapeafy(arr, shape))
	}
	if(shape.isValid()){
		return shape
	} else {
		throw new Error("The shape is not valid: " + JSON.stringify(poly))
	}
}

[alexbol99]

It makes sense. Maybe I will add this ability to the library

[alexbol99]

Available in @flatten-js/core v1.1.0

[alexbol99]

Available in v1.1.0.
Added ability to create polygon using class constructor and transfer array of numeric pairs or array of arrays.