Method merge_into

plugins/3dveins.cpp:1216–1231

}

void VeinExtent::merge_into(Ptr target)
{
    assert(target->vein == vein);

    target->num_tiles += num_tiles;

    for (size_t i = 0; i < layers.size(); i++)
    {
        target->link(layers[i]);

        layers[i]->veins[vein] = target;
    }

    num_tiles = 0;
    layers.clear();
}

void VeinExtent::place_tiles()
{