Camera place

place.cpp

void camera::place(void) {
  glm::vec3 viewPoint = this->position + this->viewDir;

   // setup opengl with gluLookAt
  gluLookAt(
    position[0], position[1], position[2],
    viewPoint[0], viewPoint[1], viewPoint[2],
    upVector[0], upVector[1], upVector[2]
  );
}