public void OnTick(EngineEntity entity)
{
var movable = entity.Current <IMovable>();
if (!movable.TargetPosition.HasValue)
{
return;
}
var transform = entity.Current <ITransform>();
var diff = movable.TargetPosition.Value - transform.Position;
var distance = diff.Magnitude;
// Detect when arrived at destination
if (distance < movable.MoveSpeed * _timeService.Step)
{
_logger.Info($"Entity `{entity.Id}` has arrived at destination {movable.TargetPosition}");
entity.Modify <IWriteableTransform>().Position = movable.TargetPosition.Value;
entity.Modify <IWriteableMovable>().TargetPosition = null;
return;
}
var moveAmount = movable.MoveSpeed * _timeService.Step;
entity.Modify <IWriteableTransform>().Position = transform.Position + moveAmount * diff.Normalized;
}
public void EntityCommitsChangesToDirtyComponents()
{
var entity = new EngineEntity(0, new IComponent[] { new SimpleComponent() }, Mock.Of <IEventDispatcher>());
var initialValue = entity.Current <ISimpleComponent>().Value;
entity.Modify <IWriteableSimpleComponent>().Value = 5;
entity.Current <ISimpleComponent>().Value.ShouldBe(initialValue);
entity.Commit();
entity.Current <ISimpleComponent>().Value.ShouldBe(5);
}
public void EntityReturnsCorrectComponent()
{
var entity = new EngineEntity(0, new IComponent[] { new SimpleComponent() }, Mock.Of <IEventDispatcher>());
var c = entity.Current <ISimpleComponent>();
c.ShouldNotBeNull();
c.ShouldBeOfType <SimpleComponent>();
}
public void EntityThrowsOnNonExistantAccess()
{
var entity = new EngineEntity(0, new IComponent[] { new SimpleComponent() }, Mock.Of <IEventDispatcher>());
Should.Throw <ComponentAccessException>(() => entity.Current <IOtherSimpleComponent>());
}
