/**
* \brief Notifies this movement that the object it controls has changed.
*/
void TargetMovement::notify_object_controlled() {
StraightMovement::notify_object_controlled();
// Coordinates have changed: compute a new trajectory.
recompute_movement();
}
/**
* \brief Updates the position.
*/
void PathFindingMovement::update() {
PathMovement::update();
if (target != nullptr && target->is_being_removed()) {
target = nullptr;
}
if (is_suspended()) {
return;
}
if (PathMovement::is_finished()) {
// there was a collision or the path was made
if (target != nullptr
&& System::now() >= next_recomputation_date
&& get_entity()->is_aligned_to_grid()) {
recompute_movement();
}
else {
set_path(create_random_path());
}
}
}
/**
* @brief Changes the target of this movement.
* @param target_x x coordinate of the target point
* @param target_y y coordinate of the target point
*/
void TargetMovement::set_target(int target_x, int target_y) {
this->target_x = target_x;
this->target_y = target_y;
recompute_movement();
next_recomputation_date = System::now() + recomputation_delay;
}
/**
* @brief Changes the target of this movement.
* @param target_entity the target entity
*/
void TargetMovement::set_target(MapEntity* target_entity) {
this->target_entity = target_entity;
this->target_x = target_x;
this->target_y = target_y;
recompute_movement();
next_recomputation_date = System::now() + recomputation_delay;
}
/**
* \brief Creates a stream action.
* \param stream The stream applied.
* \param entity_moved Entity the stream is applied to.
*/
StreamAction::StreamAction(Stream& stream, Entity& entity_moved):
stream(std::static_pointer_cast<Stream>(stream.shared_from_this())),
entity_moved(std::static_pointer_cast<Entity>(entity_moved.shared_from_this())),
active(true),
suspended(false),
when_suspended(0),
target(0, 0),
next_move_date(0),
delay(0) {
recompute_movement();
next_move_date = System::now() + delay;
}
/**
* @brief Updates the movement.
*/
void TargetMovement::update() {
if (System::now() >= next_recomputation_date) {
recompute_movement();
next_recomputation_date += recomputation_delay;
}
// see if the target is reached
int dx = target_x - get_x();
int dy = target_y - get_y();
if (dx * sign_x <= 0 && dy * sign_y <= 0) {
if (!test_collision_with_obstacles(dx, dy)) {
set_xy(target_x, target_y); // because the target movement may have not been very precise
stop();
finished = true;
}
}
StraightMovement::update();
}
/**
* \brief Changes the target of this movement.
* \param target_entity The entity to target or NULL.
* \param x X of the target point, or X offset in the case of an entity.
* \param y Y of the target point, or Y offset in the case of an entity.
*/
void TargetMovement::set_target(MapEntity* target_entity, int x, int y) {
if (this->target_entity != NULL) {
this->target_entity->decrement_refcount();
if (this->target_entity->get_refcount() == 0) {
delete this->target_entity;
}
}
this->target_entity = target_entity;
if (this->target_entity != NULL) {
this->target_entity->increment_refcount();
this->entity_offset_x = x;
this->entity_offset_y = y;
}
else {
this->target_x = x;
this->target_y = y;
}
recompute_movement();
next_recomputation_date = System::now() + recomputation_delay;
}
/**
* \brief Called repeatedly by the main loop.
* Updates the effect of the stream on the entity.
*/
void StreamAction::update() {
// If the action is already disabled, do nothing.
if (!is_active()) {
return;
}
// First check that the stream and the entity still exist
// and are enabled.
if (stream->is_being_removed()) {
stream = nullptr;
active = false;
return;
}
if (!stream->is_enabled()) {
active = false;
return;
}
if (entity_moved->is_being_removed()) {
entity_moved = nullptr;
active = false;
return;
}
if (!entity_moved->is_enabled()) {
active = false;
return;
}
// Stop the stream action if the hero escapes a non-blocking stream.
const Point& ground_point = entity_moved->get_ground_point();
if (
stream->get_allow_movement() &&
!stream->overlaps(ground_point) // We are no longer on the stream.
) {
// Blocking streams are more special.
// The hero cannot escape them so we don't need this.
// Also, diagonal blocking streams continue
// to move the entity even when it does not overlap anymore.
// This is needed to have precise
// exact diagonal movements of 16 pixels in stream mazes.
if (entity_moved->get_distance(target) > 8) {
// This last test is to avoid stopping a stream when being close to the target.
// Indeed, in the last pixels before the target, the entity's ground
// point is no longer on the stream. We continue anyway until the target.
active = false;
return;
}
}
if (is_suspended()) {
return;
}
// Update the position.
recompute_movement();
while (
System::now() >= next_move_date &&
is_active()
) {
next_move_date += delay;
int dx = 0;
int dy = 0;
if (target.x > entity_moved->get_x()) {
dx = 1;
}
else if (target.x < entity_moved->get_x()) {
dx = -1;
}
if (target.y > entity_moved->get_y()) {
dy = 1;
}
else if (target.y < entity_moved->get_y()) {
dy = -1;
}
if (test_obstacles(dx, dy)) {
bool collision = true;
// Collision with an obstacle: try only X or only Y.
if (dx != 0 && dy != 0) {
if (!test_obstacles(dx, 0)) {
dy = 0;
collision = false;
}
else if (!test_obstacles(0, dy)) {
dx = 0;
collision = false;
}
}
if (collision) {
if (!stream->get_allow_movement()) {
// Stop the stream if it was a blocking one.
active = false;
}
break;
}
}
entity_moved->set_xy(entity_moved->get_x() + dx, entity_moved->get_y() + dy);
entity_moved->notify_position_changed();
// See if the entity has come outside the stream,
// in other words, if the movement is finished.
if (has_reached_target()) {
// The target point is reached: stop the stream.
active = false;
}
recompute_movement();
}
}
/**
* \brief Sets the speed of this movement when it is not stopped.
* \param moving_speed the speed when moving, in pixels per second
*/
void TargetMovement::set_moving_speed(int moving_speed) {
this->moving_speed = moving_speed;
recompute_movement();
}
