/**
* @brief Sets the speed of the angle variation.
* @param angle_speed number of degrees to make per second
*/
void CircleMovement::set_angle_speed(int angle_speed) {
Debug::check_assertion(angle_speed > 0, StringConcat() << "Invalid angle speed: " << angle_speed);
this->angle_change_delay = 1000 / angle_speed;
this->next_angle_change_date = System::now();
recompute_position();
}
/**
* \brief Sets the center of the circles.
*
* The movement will make circles around the specified (possibly moving) entity.
*
* \param center_entity the entity around which you want to make circles
* \param x x coordinate of where the center should be placed relative to the entity's origin
* \param y y coordinate of where the center should be placed relative to the entity's origin
*/
void CircleMovement::set_center(
const EntityPtr& center_entity,
int x,
int y
) {
this->center_entity = center_entity;
this->center_point = { x, y };
recompute_position();
}
/**
* @brief Stops the movement.
*/
void CircleMovement::stop() {
previous_radius = current_radius;
set_radius(0);
if (loop_delay != 0) {
restart_date = System::now() + loop_delay;
}
recompute_position();
}
/**
* \brief Sets the speed of the angle variation.
* \param angle_speed number of degrees to make per second
*/
void CircleMovement::set_angle_speed(int angle_speed) {
if (angle_speed <= 0) {
std::ostringstream oss;
oss << "Invalid angle speed: " << angle_speed;
Debug::die(oss.str());
}
this->angle_change_delay = 1000 / angle_speed;
this->next_angle_change_date = System::now();
recompute_position();
}
/**
* @brief Sets the center of the circles.
*
* The movement will make circles around the specified fixed point.
*
* @param center_point center of the circles to make
*/
void CircleMovement::set_center(const Rectangle& center_point) {
if (this->center_entity != NULL) {
this->center_entity->decrement_refcount();
if (this->center_entity->get_refcount() == 0) {
delete this->center_entity;
}
}
this->center_entity = NULL;
this->center_point = center_point;
recompute_position();
}
/**
* @brief Sets the center of the circles.
*
* The movement will make circles around the specified (possibly moving) entity.
*
* @param center_entity the entity around which you want to make circles
* @param x x coordinate of where the center should be placed relative to the entity's origin
* @param y y coordinate of where the center should be placed relative to the entity's origin
*/
void CircleMovement::set_center(MapEntity& center_entity, int x, int y) {
if (this->center_entity != NULL) {
this->center_entity->decrement_refcount();
if (this->center_entity->get_refcount() == 0) {
delete this->center_entity;
}
}
this->center_entity = ¢er_entity;
this->center_entity->increment_refcount();
this->center_point.set_xy(x, y);
recompute_position();
}
/**
* @brief Starts the circle movement.
*/
void CircleMovement::start() {
current_angle = initial_angle;
next_angle_change_date = System::now();
nb_rotations = 0;
if (duration != 0) {
end_movement_date = System::now() + duration;
}
if (radius_change_delay == 0) {
current_radius = wanted_radius;
}
else {
next_radius_change_date = System::now();
}
recompute_position();
}
/**
* @brief Sets the radius of the circles.
* @param radius the radius in pixels
*/
void CircleMovement::set_radius(int radius) {
Debug::check_assertion(radius >= 0, StringConcat() << "Invalid radius: " << radius);
this->wanted_radius = radius;
if (radius_change_delay == 0) {
if (is_started()) {
this->current_radius = wanted_radius;
}
}
else {
this->radius_increment = (radius > this->current_radius) ? 1 : -1;
if (is_started()) {
this->next_radius_change_date = System::now();
}
}
recompute_position();
}
/**
* \brief Sets the radius of the circles.
* \param radius the radius in pixels
*/
void CircleMovement::set_radius(int radius) {
if (radius < 0) {
std::ostringstream oss;
oss << "Invalid radius: " << radius;
Debug::die(oss.str());
}
this->wanted_radius = radius;
if (radius_change_delay == 0) {
if (is_started()) {
this->current_radius = wanted_radius;
}
}
else {
this->radius_increment = (radius > this->current_radius) ? 1 : -1;
if (is_started()) {
this->next_radius_change_date = System::now();
}
}
recompute_position();
}
/**
* @brief Updates the movement.
*/
void CircleMovement::update() {
Movement::update();
if (center_entity != NULL && center_entity->is_being_removed()) {
set_center(Rectangle(
center_entity->get_x() + center_point.get_x(),
center_entity->get_y() + center_point.get_y()));
}
if (is_suspended()) {
return;
}
bool update_needed = false;
uint32_t now = System::now();
// maybe it is time to stop or to restart
if (current_radius != 0 && duration != 0 && now >= end_movement_date && wanted_radius != 0) {
stop();
}
else if (current_radius == 0 && loop_delay != 0 && now >= restart_date && wanted_radius == 0) {
set_radius(previous_radius);
start();
}
// update the angle
if (is_started()) {
while (now >= next_angle_change_date) {
current_angle += angle_increment;
current_angle = (360 + current_angle) % 360;
if (current_angle == initial_angle) {
nb_rotations++;
if (nb_rotations == max_rotations) {
stop();
}
}
next_angle_change_date += angle_change_delay;
update_needed = true;
}
}
// update the radius
while (current_radius != wanted_radius && now >= next_radius_change_date) {
current_radius += radius_increment;
next_radius_change_date += radius_change_delay;
update_needed = true;
}
// the center may have moved
if (center_entity != NULL) {
update_needed = true;
}
if (update_needed) {
recompute_position();
}
}
/**
* \brief Sets the center of the circles.
*
* The movement will make circles around the specified fixed point.
*
* \param center_point center of the circles to make
*/
void CircleMovement::set_center(const Point& center_point) {
this->center_entity = nullptr;
this->center_point = center_point;
recompute_position();
}
