IDP.Math.KCurveInLoopType 枚举
export enum KCurveInLoopType 
曲线与环的位置关系类型。
Curve and loop position relation type.
枚举成员
FullyIn
FullyIn = 2
曲线完全在环内,曲线的端点不在环的边界上。
The curve is fully in the loop, no vertex is on the edge
NotIn
NotIn = 0
曲线不在环内(曲线完全在环外,曲线与环相交或者部分在环外)。
The curve is not in the loop(include fully out of loop, cross loop or partially out of loop)
OnEdge
OnEdge = 1
曲线在环边界上。
The curve is on the edge of loop
PartiallyIn
PartiallyIn = 3
曲线部分在环内,即存在部分曲线端点在环边界上。
The curve is partially in the loop, exist vertex on the edge.