[cgma-dev] Create spline curve bug

[Boyd Tidwell]

Jane,

  After applying your changes I now get an exception raised.  Here is
the detail,


In OCCModifyEngine.cpp, my line 426 (Curve* OCCModifyEngine::make_Curve)

  //make curve according to the curve type.
  if(curve_type == SPLINE_CURVE_TYPE)
  {
    GeomAPI_Interpolate spline(points, CUBIT_FALSE, TOL);  <-- this call

which calls:

In GeomAPI_Interpolate.cxx:

GeomAPI_Interpolate::GeomAPI_Interpolate
   (const Handle_TColgp_HArray1OfPnt& PointsPtr,
    const Standard_Boolean            PeriodicFlag,
    const Standard_Real               Tolerance) :
myTolerance(Tolerance),
myPoints(PointsPtr),
myIsDone(Standard_False),
myPeriodic(PeriodicFlag),
myTangentRequest(Standard_False)
{
 Standard_Integer ii ;
 Standard_Boolean result =
   CheckPoints(PointsPtr->Array1(),
	       Tolerance) ;
 myTangents =
     new TColgp_HArray1OfVec(myPoints->Lower(),
			      myPoints->Upper()) ;
 myTangentFlags =
      new TColStd_HArray1OfBoolean(myPoints->Lower(),
				   myPoints->Upper()) ;

 if (!result) {
   Standard_ConstructionError::Raise();  <----- hits here
   }

The "Tolerance" passed in is 9.9999999999999995e-008.
The "points" variable contains 5 points:
   2 with value 0,0,0
   2 with value 1,0,1
   1 with value 2,0,0

  and, of course, "result" is zero.

Hope this helps.

  -Boyd





>Hi, Boyd

>This has been confirmed and fixed in most recent cgm. Thanks.

>Jane

On Thu, Dec 22, 2011 at 11:23 AM, Boyd Tidwell <boyd at csimsoft.com> wrote:

> Jane,
>
>  The following:
>
>    create vertex 0 0 0
>    create vertex 1 0 1
>    create vertex 2 0 0
>    create curve vertex 1 2 3 spline
>
> should create a curve that includes all three vertices. It does so in
> Cubit with the Acis engine but with OCC, the middle vertex (3) gets left
> out.  I looked a bit into the code with debug but I didn't come close to
> having an idea what the problem may be.
>
> Thanks,
>
>   - Boyd
>