Function make_trigger_face_list

physics/findintersection.cpp:2527–2594

}

void make_trigger_face_list(int last_sim_faces) {
  int num_real_collisions;
  int x;

  num_real_collisions = last_sim_faces;

  ASSERT(Fvi_num_recorded_faces <= MAX_RECORDED_FACES);

  for (x = last_sim_faces; x < Fvi_num_recorded_faces; x++) {
    vector face_normal;
    vector *vertex_ptr_list[MAX_VERTS_PER_FACE];
    int face_hit_type;
    vector wall_norm;
    vector colp;
    vector hit_point;
    int16_t count;
    room *cur_room = &Rooms[Fvi_recorded_faces[x].room_index];
    int i = Fvi_recorded_faces[x].face_index;
    float cur_dist;

    for (count = 0; count < cur_room->faces[i].num_verts; count++)
      vertex_ptr_list[count] = &cur_room->verts[cur_room->faces[i].face_verts[count]];
    /*
        mprintf(0, "FVI:In trigger %f to %f crossed %f\n",
                fvi_query_ptr->p0->z,
                fvi_hit_data_ptr->hit_pnt.z,
                vertex_ptr_list[0]->z);
    */

    face_normal = cur_room->faces[i].normal;

    face_hit_type =
        check_line_to_face(&hit_point, &colp, &cur_dist, &wall_norm, fvi_query_ptr->p0, &fvi_hit_data_ptr->hit_pnt,
                           &face_normal, vertex_ptr_list, cur_room->faces[i].num_verts, 0.0f);

    if (face_hit_type) {
      //			mprintf(0, "FVI:hit trigger\n");
      Fvi_recorded_faces[num_real_collisions].face_index = i;
      Fvi_recorded_faces[num_real_collisions++].room_index = Fvi_recorded_faces[x].room_index;
    }
  }

  if (!ROOMNUM_OUTSIDE(fvi_query_ptr->startroom) && !ROOMNUM_OUTSIDE(fvi_hit_data_ptr->hit_room)) {
    int i;

    for (i = 0; i < Rooms[fvi_query_ptr->startroom].num_portals; i++) {
      if (Rooms[fvi_query_ptr->startroom].portals[i].croom == fvi_hit_data_ptr->hit_room) {
        int j;
        bool f_found = false;

        for (j = 0; j < num_real_collisions; j++) {
          if (Fvi_recorded_faces[j].face_index == Rooms[fvi_query_ptr->startroom].portals[i].portal_face &&
              Fvi_recorded_faces[j].room_index == fvi_query_ptr->startroom) {
            f_found = true;
            break;
          }
        }