/// <summary>
/// Creates a behavior of the specified type.
/// </summary>
/// <param name="type">The type of the behavior</param>
/// <param name="simulation">The simulation.</param>
/// <returns></returns>
/// <exception cref="ArgumentNullException">simulation</exception>
public virtual IBehavior CreateBehavior(Type type, Simulation simulation)
{
if (simulation == null)
{
throw new ArgumentNullException(nameof(simulation));
}
// Get the factory and generate it
if (!BehaviorFactories.TryGetValue(GetType(), out var behaviors))
{
return(null);
}
if (behaviors.TryGetValue(type, out var behavior))
{
return(behavior(this));
}
return(null);
}
/// <summary>
/// Creates behaviors of the specified type.
/// </summary>
/// <param name="type">The types of behaviors that the simulation wants, in the order that they will be called.</param>
/// <param name="simulation">The simulation requesting the behaviors.</param>
/// <param name="entities">The entities being processed, used by the entity to find linked entities.</param>
/// <exception cref="ArgumentNullException">simulation</exception>
public virtual void CreateBehaviors(Type[] types, Simulation simulation, EntityCollection entities)
{
types.ThrowIfNull(nameof(types));
simulation.ThrowIfNull(nameof(simulation));
entities.ThrowIfNull(nameof(entities));
// Skip creating behaviors if the entity is already defined in the pool
var pool = simulation.EntityBehaviors;
if (pool.ContainsKey(Name))
{
return;
}
// Get the behavior factories for this entity
BehaviorFactoryDictionary factories;
Lock.EnterReadLock();
try
{
if (!BehaviorFactories.TryGetValue(GetType(), out factories))
{
return;
}
}
finally
{
Lock.ExitReadLock();
}
// By default, go through the types in reverse order (to account for inheritance) and create
// the behaviors
EntityBehaviorDictionary ebd = null;
var newBehaviors = new List <IBehavior>(types.Length);
for (var i = types.Length - 1; i >= 0; i--)
{
// Skip creating behaviors that aren't needed
if (ebd != null && ebd.ContainsKey(types[i]))
{
continue;
}
Lock.EnterReadLock();
try
{
if (factories.TryGetValue(types[i], out var factory))
{
// Create the behavior
var behavior = factory(this);
pool.Add(behavior);
newBehaviors.Add(behavior);
// Get the dictionary if necessary
if (ebd == null)
{
ebd = pool[Name];
}
}
}
finally
{
Lock.ExitReadLock();
}
}
// Now set them up in the order they appear
for (var i = newBehaviors.Count - 1; i >= 0; i--)
{
SetupBehavior(newBehaviors[i], simulation);
}
}