Function MakeBOAVisTable

Descent3/BOA.cpp:1559–1903

Goes through all the rooms and determines their visibility in relation to one another

#define VIS_TABLE_RESOLUTION 6
// Goes through all the rooms and determines their visibility in relation to one another
void MakeBOAVisTable(bool from_lighting) {
  int cur_check = BOAGetMineChecksum();
  int vis_stack[MAX_ROOMS * 10];
  int stack_count = 0;
  uint8_t already_checked[MAX_ROOMS + MAX_BOA_TERRAIN_REGIONS];
  uint8_t precomputed[MAX_ROOMS + MAX_BOA_TERRAIN_REGIONS][MAX_ROOMS + MAX_BOA_TERRAIN_REGIONS];

  // Removed this as we have to make a better checksum

  if (cur_check == BOA_vis_checksum) {
    // Already done, so bail
    if (!from_lighting)
      EditorMessageBox("BOA vis table already computed.");
    return;
  }

  BOA_vis_checksum = BOA_mine_checksum = 0;
#ifdef NEWEDITOR
  DoBOAVisProgressDialog(0.0f, 0, "Computing BOA");
  DoBOAVisProgressDialog(0.0f, 1);
#endif
  MakeBOA();
#ifdef NEWEDITOR
  DoBOAVisProgressDialog(100.0f, 2);
#endif

  // Now compute all room to room visibility stuff
  int i, t, j;

  mprintf(0, "Computing visibility for %d rooms.\n", Highest_room_index);

  for (i = 0; i <= Highest_room_index + MAX_BOA_TERRAIN_REGIONS; i++) {
    for (t = 0; t <= Highest_room_index + MAX_BOA_TERRAIN_REGIONS; t++) {
      BOA_Array[i][t] &= ~BOAF_VIS;
      precomputed[i][t] = 255;
    }

    BOA_Array[i][i] |= BOAF_VIS;
  }

#ifdef NEWEDITOR
  DoBOAVisProgressDialog(0.0f, 0, "Computing BOA Vis. Table");
#endif

  for (i = 0; i <= Highest_room_index; i++) {
    if (Rooms[i].used == 0)
      continue;

    room *rp = &Rooms[i];

#ifdef NEWEDITOR
    DoBOAVisProgressDialog((float)(i + 1) / (float)(Highest_room_index + 1), 1);
#endif
    mprintf_at(2, 4, 0, "Room=%d   ", i);

    if (rp->flags & RF_EXTERNAL)
      continue;