ON_Curve::IntersectCurve gets stuck in an infinite loop

Rhino Developer
1

Hallo all

We migrate our project from Rhino5 to Rhino7 and now sometimes it happens that Rhino SDK function ON_Curve::IntersectCurve gets stuck in an infinite loop and we have to turn off the Rhino via Task Manager. The curves that I intersect are generated by the project and are valid. Also I tried different tolerances, but the same.
When I draw the curves with function RhinoApp().ActiveDoc()->AddCurveObject and intersect them with the same function, it is ok.
Has the same thing happened to anyone?

2

Hi,

Best would be to provide an example and instruction hoe to replicate this.
A rhino file with 2 curves a some code to run for example.

This will isolate the issue and make it possible for a developer to test and debug.

-Willem

3

Hi

Through some tests, I realized that ON_Curve::IntersectCurve gets stuck in an infinite loop when I try to intersect curves with different dimensions. But still, the function should not enter an infinite loop in this case.
I am sending you simple code from my test command.

ON_PolyCurve curves;

ON_LineCurve lineCrv1(ON_3dPoint(-13, 122.5, 0), ON_3dPoint(-13, 27.5, 0));
ON_Curve* crv1(lineCrv1.DuplicateCurve());
crv1->SetDomain(0, 1.0);
curves.AppendAndMatch(crv1);

ON_LineCurve lineCrv11(ON_3dPoint(-13, 27.5, 0), ON_3dPoint(1499, 0, 0.01));
ON_Curve* crv11(lineCrv11.DuplicateCurve());
crv11->SetDomain(0, 1.0);
curves.AppendAndMatch(crv11);

ON_Curve* crv = curves.DuplicateCurve();

ON_LineCurve lineCrv2(ON_2dPoint(-10, -400), ON_2dPoint(-10, 400));
ON_Curve* crv2(lineCrv2.DuplicateCurve());
int dim1 = crv->Dimension();
int dim2 = crv2->Dimension();
ON_SimpleArray<ON_X_EVENT> events;
int rstl = crv->IntersectCurve(
    crv2,
    events,
    0.01,
    0.01);

return CRhinoCommand::success;

Also, if curves of different dimensions are indeed not allowed in this function, then this information should be added to the function declaration

4

Hi @BiljanaN,

Why are you creating dimension=2 curves? Seems like the solution is not to do that.

– Dale

5

Hi Dale

Yes I know that now