Function LoadPolyModel

model/polymodel.cpp:2056–2147

given a filename, reads in a POF and returns an index into the Poly_models array returns -1 if something is wrong

// given a filename, reads in a POF and returns an index into the Poly_models array
// returns -1 if something is wrong
int LoadPolyModel(const std::filesystem::path &filename, int pageable) {
  int i, polynum = -1;
  CFILE *infile = nullptr;
  int overlay = 0;

  ASSERT(Num_poly_models >= 0);
  ASSERT(Num_poly_models < MAX_POLY_MODELS);

  std::filesystem::path name = ChangePolyModelName(filename);

  // If this polymodel is already in memory, just use that index
  i = FindPolyModelName(name);
  if (i != -1) {
#ifdef RELEASE
    Poly_models[i].used++;
    return i;
#endif

    int old_used = Poly_models[i].used;
    int not_res = 0;

    if (Poly_models[i].flags & PMF_NOT_RESIDENT)
      not_res = 1;

    mprintf(1, "Model '%s' usage count is now %d.\n", Poly_models[i].name, Poly_models[i].used + 1);

    Poly_models[i].used = 1;
    FreePolyModel(i);

    memset(&Poly_models[i], 0, sizeof(poly_model));
    WBClearInfo(&Poly_models[i]);
    Poly_models[i].used = old_used + 1;
    if (not_res)
      Poly_models[i].flags = PMF_NOT_RESIDENT;

    overlay = 1;
    polynum = i;
  }

  // Not in memory, so we must load it

  if (!pageable) {
    infile = cfopen(filename, "rb");
    if (!infile)
      return -1;
  }

  if (!overlay)
    polynum = AllocPolyModel();
  else {
    if (!(Poly_models[polynum].flags & PMF_NOT_RESIDENT)) {
      if (pageable) {
        infile = cfopen(filename, "rb");
        if (!infile)
          return -1;
      }
      pageable = 0;
    }