利用PythonOCC实现等间距周长分割的曲线分析与应用

假设有一条曲线的边TopoDS_Edge,记为aEdge

from OCC.Core.BRepGProp import brepgprop_LinearProperties
from OCC.Core.GProp import GProp_GProps
from OCC.Core.GeomAdaptor import GeomAdaptor_Curve
from OCC.Core.GCPnts import GCPnts_UniformAbscissa 

aCurve &＃61; BRep_Tool.Curve(aEdge)[0]   # 先把它转换为Geom_Curve

system &＃61; GProp_GProps()

brepgprop_LinearProperties(aEdge, system)
#       print("system.Mass(): ", system.Mass())
nb_ &＃61; system.Mass() / step    # step是步长&＃xff0c;这句话的意思是等步长平分周长&＃xff0c;nb_是平分的点的数目
gac &＃61; GeomAdaptor_Curve(aCurve)
ua &＃61; GCPnts_UniformAbscissa(gac, nb_)
 if ua.IsDone():
        n &＃61; ua.NbPoints()
        pts &＃61; []
        for count in range(1, n &＃43; 1):  # 索引从1开始&＃xff0c;到n结束
                 p &＃61; gp_Pnt()
                 aCurve.D0(ua.Parameter(count), p)   # 获取坐标
                 pts.append(p)