/**
* \brief Updates the position.
*/
void RelativeMovement::update() {
if (entity_followed == nullptr) {
finished = true;
return;
}
if (entity_followed->is_being_removed()) {
finished = true;
entity_followed = nullptr;
}
else {
Point next = entity_followed->get_xy() + entity_offset;
Point dnext = next - get_xy();
if (!are_obstacles_ignored()) {
if (!finished && (dnext.x != 0 || dnext.y != 0)) {
if (!test_collision_with_obstacles(dnext)) {
set_xy(next);
}
else {
finished = true;
notify_obstacle_reached();
}
}
}
else {
set_xy(next);
}
}
}
/**
* \brief Tests whether a point collides with the map obstacles.
* \param layer Layer of point to check.
* \param point Point to check.
* \param entity_to_check The entity to check (used to decide what is
* considered as obstacle)
* \return \c true if the point is overlapping an obstacle.
*/
bool Map::test_collision_with_obstacles(
Layer layer,
const Point& point,
MapEntity& entity_to_check) const {
return test_collision_with_obstacles(layer, point.x, point.y, entity_to_check);
}
void StraightMovement::update_y() {
uint32_t next_move_time_y = delay_y;
if(move_y != 0) { //entity wants to move in y direction.
next_move_time_y = delay_y;
if(!test_collision_with_obstacles(0, move_y) && !test_collision_with_borders(0, move_y)) {
translate_y(move_y); //make the move on y
if(move_x != 0 && test_collision_with_obstacles(move_x, 0)) {
// if there is also a y move and this move is stopped by an obstacles.
next_move_time_y = (int) (1000 / get_speed());
update_x();
}
}
} else {
stop();
}
next_move_date_y += next_move_time_y;
}
void StraightMovement::update_x() {
uint32_t next_move_time_x;
if(move_x != 0) { // entity wants to move in x direction.
next_move_time_x = delay_x;
if(!test_collision_with_obstacles(move_x, 0) && !test_collision_with_borders(move_x, 0)) {
translate_x(move_x); // no collision in x direction
if(move_y != 0 && test_collision_with_obstacles(0, move_y)) {
// if there is also a y move and this move is stopped by an obstacles.
next_move_time_x = (int) (1000 / get_speed());
update_y();
}
}
} else { //entity does not want to move in x direction so we stop the movement.
stop();
}
next_move_date_x += next_move_time_x;
}
/**
* @brief Updates the y position of the entity if it wants to move
* (non-smooth version).
*/
void StraightMovement::update_non_smooth_y() {
if (y_move != 0) { // if it's time to try a move
// make the move only if there is no collision
if (!test_collision_with_obstacles(x_move, y_move)) {
translate_y(y_move);
}
else {
stop(); // also stop on x
}
next_move_date_y += y_delay;
}
}
/**
* @brief Updates the x position of the entity if it wants to move
* (non-smooth version).
*/
void StraightMovement::update_non_smooth_x() {
if (x_move != 0) {
// make the move only if there is no collision
if (!test_collision_with_obstacles(x_move, y_move)) {
translate_x(x_move);
}
else {
stop(); // also stop on y
}
next_move_date_x += x_delay;
}
}
/**
* @brief Computes the position of the object controlled by this movement.
*
* This function should be called whenever the angle, the radius or the center changes.
*/
void CircleMovement::recompute_position() {
Rectangle center = this->center_point;
if (center_entity != NULL) {
center.add_xy(center_entity->get_xy());
}
const Rectangle &xy = Geometry::get_xy(center, Geometry::degrees_to_radians(current_angle), current_radius);
if (get_entity() == NULL
|| !test_collision_with_obstacles(xy.get_x() - get_entity()->get_x(), xy.get_y() - get_entity()->get_y())) {
set_xy(xy);
notify_position_changed();
}
else {
notify_obstacle_reached();
}
}
/**
* \brief Computes the position of the object controlled by this movement.
*
* This function should be called whenever the angle, the radius or the center changes.
*/
void CircleMovement::recompute_position() {
Point center = this->center_point;
if (center_entity != nullptr) {
center += center_entity->get_xy();
}
Point xy = Geometry::get_xy(center, Geometry::degrees_to_radians(current_angle), current_radius);
if (get_entity() == nullptr
|| !test_collision_with_obstacles(xy - get_entity()->get_xy())) {
set_xy(xy);
notify_position_changed();
}
else {
notify_obstacle_reached();
}
}
/**
* @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 Updates the position.
*/
void FollowMovement::update() {
if (entity_followed == NULL) {
finished = true;
return;
}
if (entity_followed->is_being_removed()) {
finished = true;
RefCountable::unref(entity_followed);
entity_followed = NULL;
}
else {
int next_x = entity_followed->get_x() + x;
int next_y = entity_followed->get_y() + y;
int dx = next_x - get_x();
int dy = next_y - get_y();
if (!are_obstacles_ignored()) {
if (!finished && (dx != 0 || dy != 0)) {
if (!test_collision_with_obstacles(dx, dy)) {
set_x(next_x);
set_y(next_y);
}
else {
finished = true;
notify_obstacle_reached();
}
}
}
else {
set_x(next_x);
set_y(next_y);
}
}
}
/**
* @brief Updates the y position of the entity if it wants to move
* (smooth version).
*/
void StraightMovement::update_smooth_y() {
if (y_move != 0) { // The entity wants to move on y.
// By default, next_move_date_y will be incremented by y_delay,
// unless we modify the movement in such a way that the
// y speed needs to be fixed.
uint32_t next_move_date_y_increment = y_delay;
if (!test_collision_with_obstacles(0, y_move)) {
translate_y(y_move); // Make the move.
if (x_move != 0 && test_collision_with_obstacles(x_move, 0)) {
// If there is also an x move, and if this x move is illegal,
// we still allow the y move and we give it all the speed.
next_move_date_y_increment = (int) (1000.0 / get_speed());
}
}
else {
if (x_move == 0) {
// The move on y is not possible and there is no x move:
// let's try to add a move on x to make a diagonal move,
// but only if the wall is really diagonal: otherwise, the hero
// could bypass sensors.
if (!test_collision_with_obstacles(1, y_move) // Can move diagonally and:
&& (test_collision_with_obstacles(-1, 0) || // the wall is really diagonal
test_collision_with_obstacles(1, 0)) // or we don't have a choice anyway.
) {
translate_xy(1, y_move);
next_move_date_y_increment = (int) (y_delay * Geometry::SQRT_2); // Fix the speed.
}
else if (!test_collision_with_obstacles(-1, y_move)
&& (test_collision_with_obstacles(1, 0) ||
test_collision_with_obstacles(-1, 0))
) {
translate_xy(-1, y_move);
next_move_date_y_increment = (int) (y_delay * Geometry::SQRT_2);
}
else {
// The diagonal moves didn't work either.
// So we look for a place (up to 8 pixels on the left and on the right)
// where the required move would be allowed.
// If we find a such place, then we move towards this place.
bool moved = false;
for (int i = 1; i <= 8 && !moved; i++) {
if (!test_collision_with_obstacles(i, y_move) && !test_collision_with_obstacles(1, 0)) {
translate_x(1);
moved = true;
}
else if (!test_collision_with_obstacles(-i, y_move) && !test_collision_with_obstacles(-1, 0)) {
translate_x(-1);
moved = true;
}
}
}
}
else {
// The move on y is not possible, but there is also a horizontal move.
if (!test_collision_with_obstacles(x_move, y_move)) {
// This case is only necessary in narrow diagonal passages.
translate_xy(x_move, y_move);
next_move_date_x += x_delay; // Delay the next update_smooth_x() since we just replaced it.
}
else if (!test_collision_with_obstacles(x_move, 0)) {
// Do the horizontal move right now, don't wait uselessly.
update_x();
}
}
}
next_move_date_y += next_move_date_y_increment;
}
}
/**
* \brief Returns whether the entity would collide with the map
* if it was moved a few pixels from its position.
*
* If the movement is not attached to an entity of a map,
* or if obstacles are ignored, false is always returned.
*
* \param dxy distance between the current position and the position to check
* \return true if the entity would overlap the map obstacles in this position
*/
bool Movement::test_collision_with_obstacles(const Point& dxy) const {
return test_collision_with_obstacles(dxy.x, dxy.y);
}
/**
* @brief Returns whether the entity would collide with the map
* if it was moved a few pixels from its position.
*
* If the movement is not attached to an entity of a map,
* or if obstacles are ignored, false is always returned.
*
* @param dxy distance between the current position and the position to check
* @return true if the entity would overlap the map obstacles in this position
*/
bool Movement::test_collision_with_obstacles(const Rectangle& dxy) {
return test_collision_with_obstacles(dxy.get_x(), dxy.get_y());
}
/**
* \brief Updates the x position of the entity if it wants to move
* (smooth version).
*/
void StraightMovement::update_smooth_x() {
if (x_move != 0) { // The entity wants to move on x.
// By default, next_move_date_x will be incremented by x_delay,
// unless we modify below the movement in such a way that the
// x speed needs to be fixed.
uint32_t next_move_date_x_increment = x_delay;
if (!test_collision_with_obstacles(x_move, 0)) {
translate_x(x_move); // Make the move.
if (y_move != 0 && test_collision_with_obstacles(0, y_move)) {
// If there is also a y move, and if this y move is illegal,
// we still allow the x move and we give it all the speed.
next_move_date_x_increment = (int) (1000.0 / get_speed());
}
}
else {
if (y_move == 0) {
// The move on x is not possible and there is no y move:
// let's try to add a move on y to make a diagonal move,
// but only if the wall is really diagonal: otherwise, the hero
// could bypass sensors.
if (!test_collision_with_obstacles(x_move, 1) // Can move diagonally and:
&& (test_collision_with_obstacles(0, -1) || // the wall is really diagonal
test_collision_with_obstacles(0, 1)) // or we don't have a choice anyway.
) {
translate_xy(x_move, 1);
next_move_date_x_increment = (int) (x_delay * Geometry::SQRT_2); // Fix the speed.
}
else if (!test_collision_with_obstacles(x_move, -1)
&& (test_collision_with_obstacles(0, 1) ||
test_collision_with_obstacles(0, -1))
) {
translate_xy(x_move, -1);
next_move_date_x_increment = (int) (x_delay * Geometry::SQRT_2);
}
else {
// The diagonal moves didn't work either.
// So we look for a place (up to 8 pixels up and down)
// where the required move would be allowed.
// If we find a such place, then we move towards this place.
bool moved = false;
for (int i = 1; i <= 8 && !moved; i++) {
if (!test_collision_with_obstacles(x_move, i) && !test_collision_with_obstacles(0, 1)) {
translate_y(1);
moved = true;
}
else if (!test_collision_with_obstacles(x_move, -i) && !test_collision_with_obstacles(0, -1)) {
translate_y(-1);
moved = true;
}
}
}
}
else {
// The move on x is not possible, but there is also a vertical move.
if (!test_collision_with_obstacles(0, y_move)) {
// Do the vertical move right now, don't wait uselessly.
update_y();
}
else {
// The x move is not possible and neither is the y move.
// Last chance: do both x and y moves in one step.
// This case is only necessary in narrow diagonal passages.
// We do it as a last resort, because we want separate x and y
// steps whenever possible: otherwise, the hero could bypass sensors.
if (!test_collision_with_obstacles(x_move, y_move)) {
translate_xy(x_move, y_move);
next_move_date_y += y_delay; // Delay the next update_smooth_y() since we just replaced it.
}
}
}
}
next_move_date_x += next_move_date_x_increment;
}
}
/**
* @brief Updates the y position of the entity if it wants to move
* (smooth version).
*/
void StraightMovement::update_smooth_y() {
if (y_move != 0) { // the entity wants to move on y
// by default, next_move_date_y will be incremented by y_delay,
// unless we modify the movement in such a way that the
// y speed needs to be fixed
uint32_t next_move_date_y_increment = y_delay;
if (!test_collision_with_obstacles(0, y_move)) {
translate_y(y_move); // make the move
if (x_move != 0 && test_collision_with_obstacles(x_move, 0)) {
// if there is also an x move, and if this x move is illegal,
// we still allow the y move and we give it all the speed
next_move_date_y_increment = (int) (1000.0 / get_speed());
}
}
else {
if (x_move == 0) {
// The move on y is not possible: let's try
// to add a move on x to make a diagonal move.
if (!test_collision_with_obstacles(1, y_move)
&& test_collision_with_obstacles(-1, 0)) {
translate_xy(1, y_move);
next_move_date_y_increment = (int) (y_delay * Geometry::SQRT_2); // fix the speed
}
else if (!test_collision_with_obstacles(-1, y_move)
&& test_collision_with_obstacles(1, 0)) {
translate_xy(-1, y_move);
next_move_date_y_increment = (int) (y_delay * Geometry::SQRT_2);
}
else {
/* The diagonal moves didn't work either.
* So we look for a place (up to 8 pixels on the left and on the right)
* where the required move would be allowed.
* If we find a such place, then we move towards this place.
*/
bool moved = false;
for (int i = 1; i <= 8 && !moved; i++) {
if (!test_collision_with_obstacles(i, y_move) && !test_collision_with_obstacles(1, 0)) {
translate_x(1);
moved = true;
}
else if (!test_collision_with_obstacles(-i, y_move) && !test_collision_with_obstacles(-1, 0)) {
translate_x(-1);
moved = true;
}
}
}
}
else {
// no attractive place was found, but there is a horizontal move
if (!test_collision_with_obstacles(x_move, 0)) {
// do the horizontal move right now, don't wait uselessly
update_x();
}
}
}
next_move_date_y += next_move_date_y_increment;
}
}