public bool CanMove(Level level, Direction dir)
{
// Recursive movement ability checking
var targetPos = _entity.Position + Utils.MoveDelta(dir);
foreach (var entityInTargetPos in level.GetActiveEntitiesAt(targetPos))
{
// If we collide with object in a target position and an object can be pushed
// Then recursively check whether it has some space to move
if (CollisionConfig.ObjectsCollide(_entity.ObjectType, entityInTargetPos.ObjectType))
{
if (CollisionConfig.CanPush(
_entity.ObjectType,
entityInTargetPos.ObjectType))
{
var movable = entityInTargetPos.GetComponent <Movable>();
if (movable != null)
{
return(movable.CanMove(level, dir));
}
}
return(false);
}
}
// No obstacles or no collisions
return(true);
}
public IEnumerable <IChange> DoMove(Level level, Direction moveDirection, bool updateOrientation, MovementType movementType)
{
var canMove = CanMove(level, moveDirection);
// Update logical position
var targetPos = _entity.Position + Utils.MoveDelta(moveDirection);
// Move neighbor movable (push)
foreach (var entityInTargetPos in level.GetActiveEntitiesAt(targetPos))
{
// If current object collides with target object
if (CollisionConfig.ObjectsCollide(_entity.ObjectType, entityInTargetPos.ObjectType))
{
level.DispatchEarly(new CollisionEvent(
target: entityInTargetPos.Id,
sourceId: _entity.Id,
direction: Utils.AbsoluteDirectionToRelative(Utils.RevertDirection(moveDirection), entityInTargetPos.Orientation)));
level.DispatchEarly(new CollisionEvent(
target: _entity.Id,
sourceId: entityInTargetPos.Id,
direction: Utils.AbsoluteDirectionToRelative(moveDirection, _entity.Orientation)));
// Push (collidable only)
if (canMove && CollisionConfig.CanPush(
_entity.ObjectType,
entityInTargetPos.ObjectType))
{
var movable = entityInTargetPos.GetComponent <Movable>();
if (movable != null)
{
foreach (var change in movable.DoMove(level, moveDirection, false, MovementType.Pushed))
{
yield return(change);
}
}
}
}
if (CollisionConfig.ObjectsHit(_entity.ObjectType, entityInTargetPos.ObjectType))
{
level.DispatchEarly(new HitCommand(
target: entityInTargetPos.Id,
sourceId: _entity.Id,
direction: Utils.AbsoluteDirectionToRelative(Utils.RevertDirection(moveDirection), entityInTargetPos.Orientation)));
level.DispatchEarly(new HitCommand(
target: _entity.Id,
sourceId: entityInTargetPos.Id,
direction: Utils.AbsoluteDirectionToRelative(moveDirection, _entity.Orientation)));
}
}
if (!canMove)
{
yield break;
}
if (!_entity.IsActive)
{
yield break;
}
// Finally, move self
targetPos = _entity.Position + Utils.MoveDelta(moveDirection);
var targetOrientation = _entity.Orientation;
if (updateOrientation)
{
targetOrientation = moveDirection;
}
// Effects
SoundManager.Instance.Play(MoveSound);
var selfMove = new MoveChange(_entity.Id)
{
OriginalOrientation = _entity.Orientation,
OriginalPosition = _entity.Position,
TargetOrientation = targetOrientation,
TargetPosition = targetPos,
MovementType = movementType
};
_entity.MoveTo(targetPos, targetOrientation, movementType);
yield return(selfMove);
}
