Exemplo n.º 1
0
func (player *playerData) sendPositionLook(writer io.Writer) error {
	return proto.WriteEntityTeleport(
		writer,
		player.entityId,
		player.position.ToAbsIntXyz(),
		&player.look)
}
Exemplo n.º 2
0
// Generates any packets needed to update clients as to the position and
// velocity of the object.
// It assumes that the clients have either been sent packets via this method
// before, or that the previous position/velocity sent was generated from the
// LastSentPosition and LastSentVelocity attributes.
func (obj *PointObject) SendUpdate(writer io.Writer, entityId EntityId, look *LookBytes) (err error) {
	curPosition := obj.position.ToAbsIntXyz()

	dx := curPosition.X - obj.LastSentPosition.X
	dy := curPosition.Y - obj.LastSentPosition.Y
	dz := curPosition.Z - obj.LastSentPosition.Z

	if dx != 0 || dy != 0 || dz != 0 {
		if dx >= -128 && dx <= 127 && dy >= -128 && dy <= 127 && dz >= -128 && dz <= 127 {
			err = proto.WriteEntityRelMove(
				writer, entityId,
				&RelMove{
					RelMoveCoord(dx),
					RelMoveCoord(dy),
					RelMoveCoord(dz),
				},
			)
		} else {
			err = proto.WriteEntityTeleport(
				writer, entityId,
				curPosition, look)
		}
		if err != nil {
			return
		}
		obj.LastSentPosition = *curPosition
	}

	curVelocity := obj.velocity.ToVelocity()
	if curVelocity.X != obj.LastSentVelocity.X || curVelocity.Y != obj.LastSentVelocity.Y || curVelocity.Z != obj.LastSentVelocity.Z {
		if err = proto.WriteEntityVelocity(writer, entityId, curVelocity); err != nil {
			return
		}
		obj.LastSentVelocity = *curVelocity
	}

	return
}