合并three.js中的多行

Question

我想要的是将多行合并为一行以提高性能（行可以是直线，折线（闭合），圆弧，圆，椭圆）。遇到问题#1370，描述的是相同的dpatro。

我找到了什么我找到了解决方案：here，我的代码如下：

case "Line":
            var startPoint = me.stripStringToPoint(entity.StartPoint);
            var endPoint = me.stripStringToPoint(entity.EndPoint);
            var p1 = new THREE.Vector3(startPoint[0],startPoint[1],startPoint[2]);
            var p2 = new THREE.Vector3(endPoint[0],endPoint[1],endPoint[2]);
            geometry.vertices.push(p1);
            geometry.vertices.push(p2);

            var line = new THREE.LineSegments(geometry, material);
            return line;
            break;

        case "Polyline":
            var vertices = entity.Vertices;
            var color = me.stripStringToColor(entity.Color);
            for (var j = 0, len1 = vertices.length; j < len1; j = j + 2) {
                var p = new THREE.Vector3(entity.Vertices[j], entity.Vertices[j + 1],0);
                geometry.vertices.push(p);
            }
            if ( entity.Closed === true && geometry.vertices.length >0) {
                geometry.vertices.push(new THREE.Vector3(entity.Vertices[0], entity.Vertices[1],0));
            }

            var line = new THREE.LineSegments(geometry, material);//
            return line;


var mergeGeometry = new THREE.Geometry();
mergeGeometry.merge(line.geometry, line.matrix);
scene.add(new THREE.LineSegments(mergeGeometry,material ));

我在使用r.72时使用three.js r.73，这是否重要？需要你的帮助〜