Ejemplo n.º 1
0
bool PtInTriangle(VECTOR4D &V0, VECTOR4D &V1, VECTOR4D &V2, VECTOR4D &P) {
  float alpha, beta, gamma;
  VECTOR4D I = V0 - P, J = V1 - P, K = V2 - P;
  float mI = Magnity(I), mJ = Magnity(J), mK = Magnity(K);

  alpha = acosf(Dot(I, J) / (mI * mJ));
  beta = acosf(Dot(J, K) / (mJ * mK));
  gamma = acosf(Dot(K, I) / (mK * mI));

  return fabsf((2 * PI - (alpha + beta + gamma))) < EPSILON;
}
Ejemplo n.º 2
0
bool CMesh::RayCast(VECTOR4D & RayOrigin, VECTOR4D & RayDir, multimap<float, unsigned long>& Vertices, float radius) {
  for (size_t i = 0; i < m_Vertices.size(); i++) {
    if (RaySphereIntersect(RayOrigin, RayDir, m_Vertices[i].Position, radius)) {
      float dist = Magnity(m_Vertices[i].Position - RayOrigin);
      Vertices.insert(make_pair(dist, (unsigned long)i));
    }
  }
  return Vertices.size() > 0;
}
Ejemplo n.º 3
0
bool CMesh::RayCast(VECTOR4D &RayOrigin, VECTOR4D &RayDir, multimap<float, unsigned long> &Vertices, float radius)
{
    // Ecuacion de la esfera con centro en el origen
    // x^2 + y^2 + z^2 = r^2
    for (unsigned long index = 0; index < m_Vertexes.size(); ++index)
    {
        if (RaySphereIntersect(RayOrigin, RayDir, m_Vertexes[index].Position, radius))
        {
            Vertices.insert(make_pair(Magnity(m_Vertexes[index].Position - RayOrigin), index));
        }
    }
    return Vertices.size() != 0;
}
Ejemplo n.º 4
0
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;
}
Ejemplo n.º 5
0
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;
}
Ejemplo n.º 6
0
VECTOR4D Normalize(VECTOR4D &A) {
  float inv = 1.0f / Magnity(A);
  VECTOR4D R = { A.x * inv, A.y * inv, A.z * inv, A.w * inv };
  return R;
}