/**
* \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);
}
}
}
/**
* \copydoc Detector::test_collision_custom
*/
bool CustomEntity::test_collision_custom(MapEntity& entity) {
if (!successful_collision_tests.empty()) {
// Avoid reentrant collision tests.
return false;
}
bool collision = false;
const std::vector<CollisionInfo> collision_tests = this->collision_tests;
for (const CollisionInfo& info: collision_tests) {
switch (info.get_built_in_test()) {
case COLLISION_OVERLAPPING:
if (test_collision_rectangle(entity)) {
collision = true;
successful_collision_tests.push_back(info);
}
break;
case COLLISION_CONTAINING:
if (test_collision_inside(entity)) {
collision = true;
successful_collision_tests.push_back(info);
}
break;
case COLLISION_ORIGIN:
if (test_collision_origin_point(entity)) {
collision = true;
successful_collision_tests.push_back(info);
}
break;
case COLLISION_FACING:
if (test_collision_facing_point(entity)) {
collision = true;
successful_collision_tests.push_back(info);
}
break;
case COLLISION_TOUCHING:
if (test_collision_touching(entity)) {
collision = true;
successful_collision_tests.push_back(info);
}
break;
case COLLISION_CENTER:
if (test_collision_center(entity)) {
collision = true;
successful_collision_tests.push_back(info);
}
break;
case COLLISION_CUSTOM:
if (get_lua_context().do_custom_entity_collision_test_function(
info.get_custom_test_ref(), *this, entity)
) {
collision = true;
successful_collision_tests.push_back(info);
}
break;
case COLLISION_SPRITE:
// Not handled here.
break;
case COLLISION_NONE:
Debug::die("Invalid collision mode");
break;
}
}
return collision;
}