Function Vector_project

source/blender/python/mathutils/mathutils_Vector.cc:1333–1361

    "   :return: the parallel projection vector\n"
    "   :rtype: :class:`Vector`\n");
static PyObject *Vector_project(VectorObject *self, PyObject *value)
{
  const int vec_num = self->vec_num;
  float *tvec;
  double dot = 0.0f, dot2 = 0.0f;
  int x;

  if (BaseMath_ReadCallback(self) == -1) {
    return nullptr;
  }

  if (mathutils_array_parse_alloc(
          &tvec, vec_num, value, "Vector.project(other), invalid 'other' arg") == -1)
  {
    return nullptr;
  }

  /* get dot products */
  for (x = 0; x < vec_num; x++) {
    dot += double(self->vec[x] * tvec[x]);
    dot2 += double(tvec[x] * tvec[x]);
  }
  /* projection */
  dot /= dot2;
  for (x = 0; x < vec_num; x++) {
    tvec[x] *= float(dot);
  }
  return Vector_CreatePyObject_alloc(tvec, vec_num, Py_TYPE(self));
}

/** \} */