barycentric.C
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25 
26 #include "barycentric.H"
27 #include "randomGenerator.H"
28 
29 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
30 
32 {
33  scalar s = rndGen.scalar01();
34  scalar t = rndGen.scalar01();
35  scalar u = rndGen.scalar01();
36 
37  // Transform the random point in the unit cube to a random point in the
38  // unit tet by means of a series of reflections. See
39  // <http://vcg.isti.cnr.it/jgt/tetra.htm> for details.
40 
41  if (s + t > 1)
42  {
43  s = 1 - s;
44  t = 1 - t;
45  }
46 
47  if (s + t + u > 1)
48  {
49  Foam::scalar temp = u;
50 
51  if (t + u > 1)
52  {
53  u = 1 - s - t;
54  t = 1 - temp;
55  }
56  else
57  {
58  u = s + t + u - 1;
59  s = 1 - t - temp;
60  }
61  }
62 
63  return Foam::barycentric(1 - s - t - u, s, t, u);
64 }
65 
66 
67 // ************************************************************************* //
Random number generator.
gmvFile<< "tracers "<< particles.size()<< nl;forAllConstIter(Cloud< passiveParticle >, particles, iter){ gmvFile<< iter().position().x()<< " ";}gmvFile<< nl;forAllConstIter(Cloud< passiveParticle >, particles, iter){ gmvFile<< iter().position().y()<< " ";}gmvFile<< nl;forAllConstIter(Cloud< passiveParticle >, particles, iter){ gmvFile<< iter().position().z()<< " ";}gmvFile<< nl;forAll(lagrangianScalarNames, i){ word name=lagrangianScalarNames[i];IOField< scalar > s(IOobject(name, runTime.name(), cloud::prefix, mesh, IOobject::MUST_READ, IOobject::NO_WRITE))
Barycentric< scalar > barycentric
A scalar version of the templated Barycentric.
Definition: barycentric.H:45
barycentric barycentric01(randomGenerator &rndGen)
Generate a random barycentric coordinate within the unit tetrahedron.
Definition: barycentric.C:31
randomGenerator rndGen(653213)