/**
* \brief Checks whether a sprite collides with this detector.
*
* If there is a collision, the notify_collision(Entity&, Sprite&, Sprite&) method is called.
*
* \param entity the entity to check
* \param sprite the sprite of that entity
*/
void Detector::check_collision(Entity& entity, Sprite& sprite) {
if (has_collision_mode(COLLISION_SPRITE)
&& &entity != this
&& (has_layer_independent_collisions() || get_layer() == entity.get_layer())) {
// we check the collision between the specified entity's sprite and all sprites of the current entity
for (const SpritePtr& this_sprite: get_sprites()) {
if (this_sprite->test_collision(sprite, get_x(), get_y(), entity.get_x(), entity.get_y())) {
notify_collision(entity, *this_sprite, sprite);
}
}
}
}
/**
* \brief Checks whether a sprite collides with this detector.
*
* If there is a collision, the notify_collision(MapEntity&, Sprite&, Sprite&) method is called.
*
* \param entity the entity to check
* \param sprite the sprite of that entity
*/
void Detector::check_collision(MapEntity& entity, Sprite& sprite) {
if (has_collision_mode(COLLISION_SPRITE)
&& &entity != this
&& (has_layer_independent_collisions() || get_layer() == entity.get_layer())) {
// we check the collision between the specified entity's sprite and all sprites of the current entity
std::vector<Sprite*>::const_iterator it;
for (it = get_sprites().begin(); it != get_sprites().end(); it++) {
Sprite& this_sprite = *(*it);
if (this_sprite.test_collision(sprite, get_x(), get_y(), entity.get_x(), entity.get_y())) {
notify_collision(entity, sprite, this_sprite);
}
}
}
}
/**
* \brief Checks whether an entity collides with this detector.
*
* This function is called by the map when an entity has just moved.
* It checks whether the entity collides with this detector.
* Depending on the detector collision mode(s), the appropriate
* test_collision_* functions are called.
* If there is a collision, the notify_collision() method is called.
*
* \param entity the entity to check
*/
void Detector::check_collision(Entity& entity) {
if (&entity != this
&& (has_layer_independent_collisions() || get_layer() == entity.get_layer())) { // the entity is in the same layer as the detector
// detect the collision depending on the collision mode
if (has_collision_mode(COLLISION_OVERLAPPING) && test_collision_rectangle(entity)) {
notify_collision(entity, COLLISION_OVERLAPPING);
}
if (has_collision_mode(COLLISION_CONTAINING) && test_collision_inside(entity)) {
notify_collision(entity, COLLISION_CONTAINING);
}
if (has_collision_mode(COLLISION_ORIGIN) && test_collision_origin_point(entity)) {
notify_collision(entity, COLLISION_ORIGIN);
}
if (has_collision_mode(COLLISION_FACING) && test_collision_facing_point(entity)) {
if (entity.get_facing_entity() == nullptr) { // make sure only one entity can think "I am the facing entity"
entity.set_facing_entity(this);
}
notify_collision(entity, COLLISION_FACING);
}
if (has_collision_mode(COLLISION_TOUCHING) && test_collision_touching(entity)) {
notify_collision(entity, COLLISION_TOUCHING);
}
if (has_collision_mode(COLLISION_CENTER) && test_collision_center(entity)) {
notify_collision(entity, COLLISION_CENTER);
}
if (has_collision_mode(COLLISION_CUSTOM) && test_collision_custom(entity)) {
notify_collision(entity, COLLISION_CUSTOM);
}
}
}
/**
* \brief Notifies this custom entity that another entity has detected a
* pixel-precise collision with it.
* \param other_entity The other entity.
* \param other_sprite Sprite of the other entity involved in the collision.
* \param this_sprite Sprite of this custom entity entity involved in the collision.
*/
void CustomEntity::notify_collision_from(MapEntity& other_entity, Sprite& other_sprite, Sprite& this_sprite) {
// No need to check the collision again: sprite collisions are symmetrical.
notify_collision(other_entity, other_sprite, this_sprite);
}