犀牛插件开发-创建圆-Python-点后周长构建圆-Rhino插件

1.算法程序

  犀牛软件是一款专业的三维设计软件。简单实用方便，在三维矢量领域有着广泛的用途，开发拓展这款软件的插件，可以方便设计师摆脱一些繁重的重复劳动，有着现实的需求。作者整理了一个python开发的脚本，功能是点和周长构建圆，作为范例，源代码如下：

# Create a circle from a center point and a circumference.
import rhinoscriptsyntax as rs
import math

def CreateCircle(circumference=None):
    center = rs.GetPoint("Center point of circle")
    if center:
        plane = rs.MovePlane(rs.ViewCPlane(), center)
        length = circumference
        if length is None: length = rs.GetReal("Circle circumference")
        if length and length>0:
            radius = length/(2*math.pi)
            objectId = rs.AddCircle(plane, radius)
            rs.SelectObject(objectId)
            return length
    return None

# Check to see if this file is being executed as the "Main" python
# script instead of being used as a module by some other python script
# This allows us to use the module which ever way we want.
if __name__ == '__main__':
    CreateCircle()

# NOTE: see UseModule.py sample for using this script as a module

2.作者答疑

  如有疑问，请留言。