Method EvaluateFunction

Common/DataModel/vtkSpheres.cxx:66–93

------------------------------------------------------------------------------ Evaluate sphere equations. Return smallest absolute value.

//------------------------------------------------------------------------------
// Evaluate sphere equations. Return smallest absolute value.
double vtkSpheres::EvaluateFunction(double x[3])
{
  int numSpheres, i;
  double val, minVal;
  double radius[1], center[3];

  if (!this->Centers || !this->Radii)
  {
    vtkErrorMacro(<< "Please define points and/or radii!");
    return VTK_DOUBLE_MAX;
  }

  if ((numSpheres = this->Centers->GetNumberOfPoints()) != this->Radii->GetNumberOfTuples())
  {
    vtkErrorMacro(<< "Number of radii/points inconsistent!");
    return VTK_DOUBLE_MAX;
  }

  for (minVal = VTK_DOUBLE_MAX, i = 0; i < numSpheres; i++)
  {
    this->Radii->GetTuple(i, radius);
    this->Centers->GetPoint(i, center);
    val = vtkSphere::Evaluate(center, radius[0], x);
    minVal = std::min(val, minVal);
  }

  return minVal;
}

//------------------------------------------------------------------------------
// Evaluate spheres gradient.