arc3P arcBulge arcTan arcToBezier bezier4P bezierIntersectionWithLine bezierIsStraight bezierPointDistantFromPoint bezierPointLengthFromStart bezierTanget bsplinesToBeziers crossLineCircle crossTwoCircles cubicSplines cubicSplineToBezier ellipse90ToBezier ellipseToBezier fitBezier FitCubicCallback fitCubicSpline fitCurve fitCurve2 fitCurve3 fitCurve4 gaussJordan lengthOfBezier PtCallback quadBezierToCubic roundRectToBeziers SplineFlags splitBezier triEquations

crossLineCircle() int mgcurv::crossLineCircle ( Point2d &  pt1, Point2d &  pt2, const Point2d &  a, const Point2d &  b, const Point2d &  c, float  r, bool  ray = false  ) static 计算无穷直线(ab)与圆(cr)的交点，返回交点数 函数调用图: 这是这个函数的调用关系图: