intersectWith api has error, the intersect points are wrong

[475867377]

a ray intersectWith a polyline,get three intersect points.but one point is wrong .it is not intersct point in fact. i use red line to join the three point.i have marked the three point "1,2,3". the third point is not intersect  with polyline in fact.there are only two intersect points in fact. the following are the code. pts_intesect and pts_intesect2 are the same result.

AcGePoint3d pttemp = AcGePoint3d(ptc.x + drad*cos(dang),ptc.y+ drad*sin(dang),ptc.z);

AcDbRay* pray = new AcDbRay();

pray->setBasePoint(pttemp);

pray->setUnitDir(rayvec);

AcGePoint3dArray pts_intesect;

vector<AcGePoint3d> vec1;

err = polyLine->intersectWith(pray, AcDb::kExtendArg, pts_intesect);

for each (AcGePoint3d var in pts_intesect)

{

vec1.push_back(var);

}

AcGePoint3dArray pts_intesect2;

vector<AcGePoint3d> vec2;

err = pray->intersectWith(polyLine, AcDb::kExtendThis, pts_intesect2);

for each (AcGePoint3d var in pts_intesect2)

{

vec2.push_back(var);

}

delete pray;

[ynapeu]

I think you should use, AcDb::kOnBothOperands 

AcDb::kOnBothOperands

Do not extend either entity. This results in only calculating intersections where the two entity's geometry actually intersect

[tbrammer]

I tried to reproduce your observation. But the provided code is not sufficient.

Please provide values for ptc, drad, dang and rayvec and either a DWG with a polyline that can be used for polyline or code to create it.