/// <summary>
/// Constructs an entity buffer
/// </summary>
/// <param name="entityHash">the hash value for the entity hash table, larger means faster name searches but more memory</param>
/// <param name="systemLinkHash">the hash value for system link hash table, larger means faster search but more memory</param>
/// <param name="entityPagePower">the size of the entity pages in the form of a power of 2</param>
/// <param name="entityPageCount">the initial number of entity pages, this has a small affect on early performance</param>
/// <param name="entityComponentPagePower">the size of the entity component pages in the form of a power of 2</param>
/// <param name="entityComponentPageCount">the initial number of entity pages, this has a small affect on early performance</param>
/// <param name="entityListPagePower">the size of the entity list pages in the form of a power of 2</param>
/// <param name="entityListPageCount">the initial number of entity pages, this has a small affect on early performance</param>
/// <param name="systemLinkPagePower">the size of the systemlink pages in the form of a power of 2</param>
/// <param name="systemLinkPageCount">the initial number of entity pages, this has a small affect on early performance</param>
/// <param name="componentTypes">The registry for component types which is used to get type IDs if a system is registered before its type ids are filled out</param>
public EntityBuffer(IComponentTypeRegistry componentTypes, int entityHash = 47, int systemLinkHash = 47, int entityPagePower = 8,
int entityComponentPagePower = 8, int entityListPagePower = 8, int systemLinkPagePower = 8, int entityPageCount = 1,
int entityComponentPageCount = 1, int entityListPageCount = 1, int systemLinkPageCount = 1)
{
_entities = new NamedDataRegistry <BufferedBinarySearchTree <EntityLink> >(entityPagePower, entityPageCount, entityHash);
_links = new PagedArray <SystemLink>(systemLinkPagePower, systemLinkPageCount);
_lists = new PagedArray <EntityList>(systemLinkPagePower, systemLinkPageCount);
_hashVal = systemLinkHash;
_starts = new int[_hashVal];
_ends = new int[_hashVal];
_listPower = entityListPagePower;
_listPages = entityListPageCount;
_entityPower = entityComponentPagePower;
_entityPages = entityComponentPageCount;
_componentTypes = componentTypes;
}
/// <summary>
/// Constructs an engine loader with the given parameters using the default admin
/// </summary>
/// <param name="targetLogicFrameLength">the frame length in seconds of logic updates which the engine will attempt to keep</param>
/// <param name="targetMaxRenderFrameLength">the frame length in seconds of render updates which the engine will try to stay below</param>
/// <param name="componentTypeRegistry">the component type registry to use to store component types</param>
/// <param name="systemRegistry">the system registry to store systems</param>
/// <param name="entityBuffer">the entity buffer to use to store entities</param>
protected EngineLoader(IComponentTypeRegistry componentTypeRegistry,
ISystemRegistry systemRegistry, IEntityBuffer entityBuffer, float targetLogicFrameLength = 1f / 60f, float targetMaxRenderFrameLength = 1f / 30f)
{
Admin = new EntityAdmin(targetLogicFrameLength, targetMaxRenderFrameLength, componentTypeRegistry, systemRegistry, entityBuffer);
}
