C++ (Cpp) DerivativeAt Examples

Example #1

File: opennurbs_ellipse.cpp Project: Arecius/opennurbs

ON_3dVector ON_Ellipse::CurvatureAt( 
                 double t // parameter
                 ) const
{
  ON_3dVector T, K;
  ON_EvCurvature(DerivativeAt( 1, t ),DerivativeAt( 2, t ),T,K);
  return K;
}

Example #2

File: opennurbs_ellipse.cpp Project: Arecius/opennurbs

ON_3dVector ON_Ellipse::TangentAt( 
                 double t // parameter
                 ) const
{
  ON_3dVector T = DerivativeAt( 1, t );
  T.Unitize();
  return T;
}

Example #3

File: poly_func.cpp Project: Martin-Mok-Tin-Kui/comp2012h-1

void PolyFunc::Print(ostream& os, double x) const {
	const char* const T = "true";
	const char* const F = "false";

	os << "name = " << GetName() << endl
		<< "is periodic = " << (IsPeriodic()? T: F) << endl
		<< "value at " << x << " = ";
		if(fabs(EvaluateAt(x)-DBL_MAX)<0.000001)
            os << F<<endl;
        else
            os << EvaluateAt(x) << endl;
	os << "is differentiable at " << x << " = "
		<< (IsDifferentiable(x)? T: F) << endl;

	if (IsDifferentiable(x)) {
		os << "derivative at " << x << " = " << DerivativeAt(x) << endl;
	}
}

Example #4

File: opennurbs_polyline.cpp Project: ckvk/opennurbs

ON_3dVector ON_Polyline::TangentAt( double t ) const
{
    ON_3dVector v = DerivativeAt(t);
    v.Unitize();
    return v;
}

Example #5

File: opennurbs_circle.cpp Project: ckvk/opennurbs

ON_3dVector ON_Circle::TangentAt( double t ) const
{
  ON_3dVector T = DerivativeAt(1,t);
  T.Unitize();
  return T;
}