Method OnTrigAddFloating

editor/TriggerDialog.cpp:501–584

#define TRIG_DEFAULT_SIZE 10.0

void CTriggerDialog::OnTrigAddFloating() {
  int facenum, vertnum;
  room *rp;
  face *fp;
  vector center;
  fvi_query fq;
  fvi_info hit_info;
  int fate;

  if (OBJECT_OUTSIDE(Viewer_object)) {
    OutrageMessageBox("Sorry, this operation does not yet work in the terrain.");
    return;
  }

  char name[TRIG_NAME_LEN + 1] = "";

  if (!InputString(name, sizeof(name), "Trigger Name", "Enter a name for this trigger"))
    return;

  // Get center point of new face
  center = Viewer_object->pos + (Viewer_object->orient.fvec * TRIG_PLACE_DIST);

  // Make sure the viewer in in the mine
  if (Viewer_object->flags & OF_OUTSIDE_MINE)
    goto bad_place;

  // Check if position ok
  fq.p0 = &Viewer_object->pos;
  fq.startroom = Viewer_object->roomnum;
  fq.p1 = &center;
  fq.rad = 0;
  fq.thisobjnum = -1;
  fq.ignore_obj_list = NULL;
  fq.flags = 0;
  fate = fvi_FindIntersection(&fq, &hit_info);

  // Bail if there's something in the way, or if the center point is outside
  if ((fate != HIT_NONE) || ROOMNUM_OUTSIDE(hit_info.hit_room)) {

  bad_place:;
    OutrageMessageBox("You cannot place a floating trigger here.");
    return;
  }

  // Get pointer to room the trigger is in
  rp = &Rooms[hit_info.hit_room];

  // Create a new face & new verts
  facenum = RoomAddFaces(rp, 1);
  vertnum = RoomAddVertices(rp, 4);
  fp = &rp->faces[facenum];
  InitRoomFace(fp, 4);

  // Set the vertices for the new face
  rp->verts[vertnum] =
      center - (Viewer_object->orient.rvec * TRIG_DEFAULT_SIZE) + (Viewer_object->orient.uvec * TRIG_DEFAULT_SIZE);
  rp->verts[vertnum + 1] =
      center + (Viewer_object->orient.rvec * TRIG_DEFAULT_SIZE) + (Viewer_object->orient.uvec * TRIG_DEFAULT_SIZE);