C++ (Cpp) RayCastOnTriangle Examples

Example #1

File: Mesh.cpp Project: Nazul/MSC-CG_OpenGL

bool CMesh::RayCast(VECTOR4D &RayOrigin, VECTOR4D &RayDir, multimap<float, INTERSECTIONINFO>& Faces) {
  unsigned long nFaces = (unsigned long)m_Indices.size() / 3;
  unsigned long nBaseIndex = 0;
  unsigned long nIntersectedFaces = 0;

  for (unsigned long iFace = 0; iFace < nFaces; iFace++) {
    VECTOR4D &V0 = m_Vertices[m_Indices[nBaseIndex + 0]].Position;
    VECTOR4D &V1 = m_Vertices[m_Indices[nBaseIndex + 1]].Position;
    VECTOR4D &V2 = m_Vertices[m_Indices[nBaseIndex + 2]].Position;
    VECTOR4D Intersection;

    if (RayCastOnTriangle(V0, V1, V2, RayOrigin, RayDir, Intersection)) {
      float dist = Magnity(Intersection - RayOrigin);
      INTERSECTIONINFO II;
      II.Face = iFace;
      II.LocalPosition = Intersection;
      Faces.insert(make_pair(dist, II));
      nIntersectedFaces++;
    }
    nBaseIndex += 3;
  }
  return nIntersectedFaces > 0;
}

Example #2

File: Mesh.cpp Project: Kalabaza/Graficas

bool CMesh::RayCast(VECTOR4D &RayOrigin, VECTOR4D &RayDir, multimap<float, INTERSECTIONINFO> &Faces)
{
    unsigned long nFaces = m_Indexes.size() / 3;
    unsigned long nBaseIndex = 0;
    unsigned long nIntersectedFaces = 0;
    for (unsigned long iFace = 0; iFace < nFaces; ++iFace, nBaseIndex+=3)
    {
        VECTOR4D &V0 = m_Vertexes[m_Indexes[nBaseIndex]].Position;
        VECTOR4D &V1 = m_Vertexes[m_Indexes[nBaseIndex + 1]].Position;
        VECTOR4D &V2 = m_Vertexes[m_Indexes[nBaseIndex + 2]].Position;
        VECTOR4D Intersection;
        if (RayCastOnTriangle(V0, V1, V2, RayOrigin, RayDir, Intersection))
        {
            // Distancia entre el origen y esa interseccion
            float dist = Magnity(Intersection - RayOrigin);
            INTERSECTIONINFO II;
            II.Face = iFace;
            II.LocalPosition = Intersection;
            Faces.insert(make_pair(dist, II));
            ++nIntersectedFaces;
        }
    }
    return nIntersectedFaces != 0;
}