/**
* @author WestLangley / http://github.com/WestLangley
*/
export class EdgesGeometry {
   // THREE.EdgesGeometry = function(geometry, thresholdAngle) {
   //    THREE.BufferGeometry.call(this);
   //    thresholdAngle = (thresholdAngle !== undefined) ? thresholdAngle : 1;
   //    var thresholdDot = Math.cos(THREE.Math.degToRad(thresholdAngle));
   //    var edge = [0, 0], hash = {};
   //    function sortFunction(a, b) {
   //       return a - b;
   //    }
   //    var keys = ['a', 'b', 'c'];
   //    var geometry2;
   //    if (geometry instanceof THREE.BufferGeometry) {
   //       geometry2 = new THREE.Geometry();
   //       geometry2.fromBufferGeometry(geometry);
   //    } else {
   //       geometry2 = geometry.clone();
   //    }
   //    geometry2.mergeVertices();
   //    geometry2.computeFaceNormals();
   //    var vertices = geometry2.vertices;
   //    var faces = geometry2.faces;
   //    for (var i = 0, l = faces.length; i < l; i++) {
   //       var face = faces[i];
   //       for (var j = 0; j < 3; j++) {
   //          edge[0] = face[keys[j]];
   //          edge[1] = face[keys[(j + 1) % 3]];
   //          edge.sort(sortFunction);
   //          var key = edge.toString();
   //          if (hash[key] === undefined) {
   //             hash[key] = { vert1: edge[0], vert2: edge[1], face1: i, face2: undefined };
   //          } else {
   //             hash[key].face2 = i;
   //          }
   //       }
   //    }
   //    var coords = [];
   //    for (var key in hash) {
   //       var h = hash[key];
   //       if (h.face2 === undefined || faces[h.face1].normal.dot(faces[h.face2].normal) <= thresholdDot) {
   //          var vertex = vertices[h.vert1];
   //          coords.push(vertex.x);
   //          coords.push(vertex.y);
   //          coords.push(vertex.z);
   //          vertex = vertices[h.vert2];
   //          coords.push(vertex.x);
   //          coords.push(vertex.y);
   //          coords.push(vertex.z);
   //       }
   //    }
   //    this.addAttribute('position', new THREE.BufferAttribute(new Float32Array(coords), 3));
   // };
   // THREE.EdgesGeometry.prototype = Object.create(THREE.BufferGeometry.prototype);
   // THREE.EdgesGeometry.prototype.constructor = THREE.EdgesGeometry;
}