/// <summary>
/// Adds a component to the entity.
/// </summary>
/// <param name="type">The type of the component.</param>
/// <returns>
/// The component instance.
/// </returns>
/// <exception cref="System.Exception">Component already exists.</exception>
internal Component AddComponent(Type type)
{
var info = ComponentHelper.GetInfo(type);
if (!info.HasValue)
{
throw new Exception("Internal error: component is not registered.");
}
ulong id = info.Value.Id;
if (this.components[id] != null)
{
throw new Exception("Component already exists.");
}
var component = ComponentHelper.CreateInstance(type);
component.Owner = this;
this.components[id] = component;
var drawable = component as DrawableComponent;
if (drawable != null)
{
this.drawableComponents[id] = drawable;
}
this.ComponentMask |= info.Value.Mask;
return component;
}
