Bug ON_NurbsCurve Rhino 8 sr3

Rhino Developer
1

Hi everyone, this produce a flat curve on z and it should not …
if some one can confirm that bug ?

Compiling code:

	const int nPoints = 3;
	int degree = 2;
	ON_3dPoint* ptList = new ON_3dPoint[nPoints];
	ON_NurbsCurve crv;

	//Create some points
	ptList[0] = ON_3dPoint(1, 0, 1);
	ptList[1] = ON_3dPoint(2, 1.5, 2);
	ptList[2] = ON_3dPoint(3, 2, 3);

	crv.CreateClampedUniformNurbs(degree, degree + 1, nPoints, ptList);
	context.m_doc.AddCurveObject(crv);
	context.m_doc.Redraw();
	delete[] ptList;
	return CRhinoCommand::success;
2

Hi @JulienPoivret,

This seems to work:

CRhinoCommand::result CCommandTest::RunCommand(
  const CRhinoCommandContext& context
)
{
  const int dimension = 3;
  const int degree = 2;
  const int order = degree + 1;

  ON_3dPoint points[order]; // 3
  points[0] = ON_3dPoint(1.0, 0.0, 1.0);
  points[1] = ON_3dPoint(2.0, 1.5, 2.0);
  points[2] = ON_3dPoint(3.0, 2.0, 3.0);

  ON_NurbsCurve nurb;
  nurb.CreateClampedUniformNurbs(dimension, order, order, points);
  if (nurb.IsValid())
  {
    ON_Plane plane;
    bool bIsPlanar = nurb.IsPlanar(&plane); // return true

    context.m_doc.AddCurveObject(nurb);
    context.m_doc.Redraw();
  }

  return CRhinoCommand::success;
}

– Dale

3

Thanks @dale the mistake was on me :expressionless: