Method appendChild

core/2d/SpriteBatchNode.cpp:592–634

addChild helper, faster than insertChild

// addChild helper, faster than insertChild
void SpriteBatchNode::appendChild(Sprite* sprite)
{
    _reorderChildDirty = true;
    sprite->setBatchNode(this);
    sprite->setDirty(true);

    if (_textureAtlas->getTotalQuads() == _textureAtlas->getCapacity())
    {
        increaseAtlasCapacity();
    }

    _descendants.emplace_back(sprite);
    int index = static_cast<int>(_descendants.size() - 1);

    sprite->setAtlasIndex(index);

    auto&& quad = sprite->getQuad();
    _textureAtlas->insertQuad(quad, index);

    // add children recursively
    auto& children = sprite->getChildren();

    // axmol Github issue #502
    for (auto iter = children.begin(); iter != children.end();)
    {
        auto child = *iter;
#if AX_SPRITE_DEBUG_DRAW
        // when using AX_SPRITE_DEBUG_DRAW, a DrawNode is appended to sprites. remove it since only Sprites can be used
        // as children in SpriteBatchNode
        // Github issue #14730
        if (dynamic_cast<DrawNode*>(child))
        {
            sprite->resetChild(child, true);
            iter = children.erase(iter);
            continue;
        }
#endif
        AXASSERT(dynamic_cast<Sprite*>(child) != nullptr,
                 "You can only add Sprites (or subclass of Sprite) to SpriteBatchNode");
        appendChild(static_cast<Sprite*>(child));
        ++iter;
    }
}

void SpriteBatchNode::removeSpriteFromAtlas(Sprite* sprite)
{