how to use only the OCC mathematical API's in the VC++ 6.0 application

senthilsp
Tue, 11/14/2006 - 12:29

Forums:

how to use only the OCC mathematical API's in the VC++ 6.0 application.

Is it possible to use only the mathematical logical stuffs which deals with BSpline , interpolation and method to get the distance between a point and BSpline curve.

If yes , provide me required information regarding the same and it would be so grateful if you could explain with some sample application

rgds
Senthil

himanshun
Tue, 11/14/2006 - 14:19

You can create a b-spline curve with control points, knots and multiplicities vector.
Standard_Integer nPoints = NUMBER_OF_BSPLINE_POINTS;
TColgp_Array1OfPnt bPoints(1,nPoints);
TColStd_Array1OfReal bKnots(1,nPoints);
TColStd_Array1OfInteger bMult(1,nPoints);
for ( unsigned int i = 1; i <= nPoints; i++ )
{
Standard_Real U = startU + (i-1)*(endU - startU)/(nPoints - 1);
gp_Pnt P = brepAdaptorCurve.Value(U);
bPoints.SetValue(i,P);
bKnots.SetValue(i,U);
bMult.SetValue(i,1);
}
bMult.SetValue(1,2);
bMult.SetValue(nPoints,2);
Handle(Geom_BSplineCurve) geomBSplineCurve = new Geom_BSplineCurve( bPoints, bKnots, bMult, 1);

Hope this helps you.

senthilsp
Tue, 11/14/2006 - 15:11

Thanks himanshun for prompt reply,

I have started to study on your code .

Could you please explain the following details
1)About the startU and endU declaration.
2)About brepAdaptorCurve
while compiling , am receiving
"error C2065: 'brepAdaptorCurve' : undeclared identifier"

Please let me know whether you have any sample application matching with my request.
if so let me know ....

rgds
Senthil

himanshun
Tue, 11/14/2006 - 15:15

Hi,

You can create this curve from TopoDS_Edge input.
startU and endU is parameter on curve. Mostly, 0 and 1 respectively.
BRepAdaptor_Curve brepAdaptorCurve( cascadeEdge);

Regards,
Himanshu