Polyline Pro可以在3DS MAX中随意控制比如长度或者角度来制作样条线，就像AutoCAD一样，更加方便。

Polyline Pro is an easy to use yet powerful and intuitive tool which provides a clear and efficient user interface to create splines precisely with measurements and angles in a manner similar to AutoCAD. The main purpose of Polyline Pro is to bring the spline drawing in 3dsMax at a higher level.  

插件功能：
    draw splines in Orthographic, Polar, Arc and Freehand mode
    create points using Absolute or Relative coordinates
    use direct distance entry – point in desired direction and type the length and/or the angle to create a segment
    edit splines
    use guides and tooltips
    use short commands for quick access to almost all of the features
    use Object Snaps to mark certain points/lines and continue to draw in their projection or intersection
    draw spline using World Coordinate System or User Coordiante System

支持的3DS MAX版本：
    2010, 2011, 2013, 2014, 2015, 2016, 2017, 2018，不支持2012

安装说明：
打开3DS MAX，将mzp文件拖拽到窗口即可开始安装

样条线制作生成脚本 miauu’s Maxscript Polyline Pro V1.2-V1.4下载地址：