SurfaceCurvature

返回一个曲面在UV参数位置的曲率数据。请参考 Rhino 帮助文件中关于曲面曲率的论述。

rhinoscriptsyntax.SurfaceCurvature (surface_id, parameter)

rhinoscript.surface.SurfaceCurvature (surface_id, parameter)

surface_id	必须参数。字符串或 Guid。物件的 ID 。
parameter	必须参数。由两个UV参数值构成的列表或元组。

元组

执行成功返回包含曲率信息的元组。元组包含以下信息：

None

如果执行不成功或出错，返回空值。

import rhinoscriptsyntax as rs

srf = rs.GetObject("Select a surface", rs.filter.surface)

if rs.IsSurface(srf):

point = rs.GetPointOnSurface(srf, "Pick a test point")

if point:

param = rs.SurfaceClosestPoint(srf, point)

if param:

data = rs.SurfaceCurvature(srf, param)

if data:

print "Surface curvature evaluation at parameter", param, ":"

print " 3-D Point:", data[0]

print " 3-D Normal:", data[1]

print " Maximum principal curvature:", data[2], " ", data[3]

print " Minimum principal curvature:", data[4], " ", data[5]

print " Gaussian curvature:", data[6]

print " Mean curvature:", data[7]