Method insertChild

core/2d/ParticleBatchNode.cpp:485–509

add child helper

// add child helper
void ParticleBatchNode::insertChild(ParticleSystem* system, int index)
{
    system->setAtlasIndex(index);

    if (_textureAtlas->getTotalQuads() + system->getTotalParticles() > _textureAtlas->getCapacity())
    {
        increaseAtlasCapacityTo(_textureAtlas->getTotalQuads() + system->getTotalParticles());

        // after a realloc empty quads of textureAtlas can be filled with gibberish (realloc doesn't perform calloc),
        // insert empty quads to prevent it
        _textureAtlas->fillWithEmptyQuadsFromIndex(_textureAtlas->getCapacity() - system->getTotalParticles(),
                                                   system->getTotalParticles());
    }

    // make room for quads, not necessary for last child
    if (system->getAtlasIndex() + system->getTotalParticles() != _textureAtlas->getTotalQuads())
    {
        _textureAtlas->moveQuadsFromIndex(index, index + system->getTotalParticles());
    }

    // increase totalParticles here for new particles, update method of particle-system will fill the quads
    _textureAtlas->increaseTotalQuadsWith(system->getTotalParticles());

    updateAllAtlasIndexes();
}

// rebuild atlas indexes
void ParticleBatchNode::updateAllAtlasIndexes()