Method loadNavMeshFile

core/navmesh/NavMesh.cpp:161–240

}

bool NavMesh::loadNavMeshFile()
{
    auto data = FileUtils::getInstance()->getDataFromFile(_navFilePath);
    if (data.isNull())
        return false;

    // Read header.
    unsigned int offset       = 0;
    TileCacheSetHeader header = *(reinterpret_cast<TileCacheSetHeader*>(data.getBytes() + offset));
    offset += sizeof(TileCacheSetHeader);
    if (header.magic != TILECACHESET_MAGIC)
    {
        return false;
    }
    if (header.version != TILECACHESET_VERSION)
    {
        return false;
    }

    _navMesh = dtAllocNavMesh();
    if (!_navMesh)
    {
        return false;
    }
    dtStatus status = _navMesh->init(&header.meshParams);
    if (dtStatusFailed(status))
    {
        return false;
    }

    _tileCache = dtAllocTileCache();
    if (!_tileCache)
    {
        return false;
    }

    _allocator   = new LinearAllocator(32000);
    _compressor  = new FastLZCompressor();
    _meshProcess = new MeshProcess(_geomData);
    status       = _tileCache->init(&header.cacheParams, _allocator, _compressor, _meshProcess);

    if (dtStatusFailed(status))
    {
        return false;
    }

    // Read tiles.
    for (int i = 0; i < header.numTiles; ++i)
    {
        TileCacheTileHeader tileHeader = *((TileCacheTileHeader*)(data.getBytes() + offset));
        offset += sizeof(TileCacheTileHeader);
        if (!tileHeader.tileRef || !tileHeader.dataSize)
            break;

        unsigned char* tileData = (unsigned char*)dtAlloc(tileHeader.dataSize, DT_ALLOC_PERM);
        if (!tileData)
            break;
        memcpy(tileData, (data.getBytes() + offset), tileHeader.dataSize);