Function GenerateLineAtKnownDistance

Common/DataModel/Testing/Cxx/UnitTestLine.cxx:169–205

}

void GenerateLineAtKnownDistance(
  vtkMinimalStandardRandomSequence* seq, double* a1, double* a2, double* p, double& dist)
{
  // Generate a line (a1,a2) set a known distance (dist) from a generated point
  // p.

  double v1[3], v2[3], v3[3];
  for (unsigned i = 0; i < 3; i++)
  {
    v1[i] = seq->GetValue();
    seq->Next();
    v2[i] = seq->GetValue();
    seq->Next();
  }
  vtkMath::Cross(v1, v2, v3);
  vtkMath::Normalize(v1);
  vtkMath::Normalize(v2);
  vtkMath::Normalize(v3);

  double a1_to_a12 = .1 + seq->GetValue();
  seq->Next();
  double a12_to_a2 = .1 + seq->GetValue();
  seq->Next();

  dist = seq->GetValue();
  seq->Next();

  double nearest[3];
  for (unsigned i = 0; i < 3; i++)
  {
    nearest[i] = seq->GetValue();
    seq->Next();
    p[i] = nearest[i] + dist * v3[i];
    a1[i] = nearest[i] - a1_to_a12 * v1[i];
    a2[i] = nearest[i] + a12_to_a2 * v1[i];
  }
}

double PointToLineSegment(double* p1, double* p2, double* p, double* pn, double& u)
{