Function IsPathPointValid

Descent3/BOA.cpp:1288–1324

#pragma optimize("", on)

bool IsPathPointValid(int room, vector *pos) {
  // vector c_pnt = Rooms[room].path_pnt;
  int i;

  if (Rooms[room].flags & RF_EXTERNAL)
    return true;

  for (i = 0; i < Rooms[room].num_portals; i++) {
    fvi_info hit_info;
    fvi_query fq;
    int fate;

    if (!BOA_PassablePortal(room, i))
      continue;

    vector portal_pnt = Rooms[room].portals[i].path_pnt;

    // shoot a ray from the light position to the current vertex
    fq.p0 = &portal_pnt;
    fq.p1 = pos;
    fq.startroom = room;

    fq.rad = 5.0f;
    fq.flags =
        FQ_SOLID_PORTALS | FQ_NO_RELINK; // chrishack -- Might want to make FQ_IGNORE_MOVING_OBJECTS into a passed arg
    fq.thisobjnum = -1;
    fq.ignore_obj_list = NULL;

    fate = fvi_FindIntersection(&fq, &hit_info);

    if (fate != HIT_NONE) {
      return false;
    }
  }

  return true;
}

#define MAX_SUBDIVISIONS 12 // Actually 19 (we don't do extremities)