Function MergeObjectIntoRoom

editor/HRoom.cpp:3089–3162

Incorporates the geometry from the specified object into the specified room. Deletes the object. Returns true if worked, false if some error

// Incorporates the geometry from the specified object into the specified room.  Deletes the object.
// Returns true if worked, false if some error
bool MergeObjectIntoRoom(room *rp, int objnum) {
  object *objp = &Objects[objnum];
  ASSERT(objp->render_type == RT_POLYOBJ);

  poly_model *pm = GetPolymodelPointer(objp->rtype.pobj_info.model_num);

  if (pm->n_models > 1) {
#ifndef NEWEDITOR
    OutrageMessageBox("Cannot merge: Only supported for objects with one submodel.\n\nIf you really need this "
                      "functions for objects with multiple submodles, talk to MattT.");
#else
    OutrageMessageBox("Cannot merge: Only supported for objects with one submodel.");
#endif
    return 0;
  }
  if (!pm->n_ground) {
    OutrageMessageBox("Cannot merge: The object must have a ground plane to merge.");
    return 0;
  }
  if (OBJECT_OUTSIDE(objp)) {
    OutrageMessageBox("Cannot merge: The object is outside.");
    return 0;
  }
  if (objp->roomnum != ROOMNUM(rp)) {
    OutrageMessageBox("Cannot merge: The object is not in the specified room.");
    return 0;
  }

  // Get points to model data
  bsp_info *sm = &pm->submodel[0];

  // Add verts to room
  int first_new_vert = RoomAddVertices(rp, sm->nverts);

  // Rotate the points and copy them to the room
  matrix rotmat = ~objp->orient;
  for (int i = 0; i < sm->nverts; i++) {
    rp->verts[first_new_vert + i] = objp->pos + sm->verts[i] * rotmat;
  }

  // Add faces to the room
  int first_new_face = RoomAddFaces(rp, sm->num_faces);

  // Copy the faces
  for (i = 0; i < sm->num_faces; i++) {
    polyface *pfp = &sm->faces[i];
    face *fp = &rp->faces[first_new_face + i];

    InitRoomFace(fp, pfp->nverts);

    for (int v = 0; v < fp->num_verts; v++) {
      fp->face_verts[v] = first_new_vert + pfp->vertnums[v];
      fp->face_uvls[v].u = pfp->u[v];
      fp->face_uvls[v].v = pfp->v[v];
    }

#ifndef NEWEDITOR
    fp->tmap = pm->textures[pfp->texnum];