public T AddUnique <T>(bool useExisted = true) where T : IComponent, IUnique, new()
{
int componentIndex = ComponentIndex <T> .FindIn(this.contextInfo);
Entity entity = GetSingleEntity(componentIndex);
if (entity != null)
{
if (!useExisted)
{
throw new EntityAlreadyHasComponentException(
componentIndex, "Cannot add component '" +
_contextInfo.componentNames[componentIndex] + "' to " + entity + "!",
"You should check if an entity already has the component."
);
}
return((T)ModifyUniqueComponent(componentIndex));
}
entity = CreateEntity(typeof(T).Name);
T component = entity.CreateComponent <T>(componentIndex);
entity.AddComponent(componentIndex, component);
return(component);
}
/// Adds copies of all specified components to the target entity.
/// If replaceExisting is true it will replace exisintg components.
public static void CopyTo(this Entity entity,
Entity target,
bool replaceExisting = false,
params int[] indices)
{
var componentIndices = indices.Length == 0
? entity.GetComponentIndices()
: indices;
for (int i = 0; i < componentIndices.Length; i++)
{
var index = componentIndices[i];
var component = entity.GetComponent(index);
var clonedComponent = target.CreateComponent(
index, component.GetType()
);
component.CopyPublicMemberValues(clonedComponent);
if (replaceExisting)
{
target.ReplaceComponent(index, clonedComponent);
}
else
{
target.AddComponent(index, clonedComponent);
}
}
}
/// Adds copies of all specified components to the target entity.
/// If replaceExisting is true it will replace exisintg components.
public static void CopyTo(this Entity entity,
Entity target,
bool replaceExisting = false,
params int[] indices)
{
var componentIndices = indices.Length == 0
? entity.GetComponentIndices()
: indices;
for(int i = 0; i < componentIndices.Length; i++) {
var index = componentIndices[i];
var component = entity.GetComponent(index);
var clonedComponent = target.CreateComponent(
index, component.GetType()
);
component.CopyPublicMemberValues(clonedComponent);
if(replaceExisting) {
target.ReplaceComponent(index, clonedComponent);
} else {
target.AddComponent(index, clonedComponent);
}
}
}