CollisionDirection CollisionHandler::DetectCollisionWithObj(MovingObject& _obj, DisplayableObject& _ref)
{
if (_obj.GetID() == _ref.GetID())
return NO_COL;
return DetectCollisionWithRect(_obj.GetCoordinates(), _ref.GetCoordinates());
}
void
FlipLevelTransformer::transform_moving_object(float height, MovingObject& object)
{
Vector pos = object.get_pos();
pos.y = height - pos.y - object.get_bbox().get_height();
object.set_pos(pos);
}
void
Sector::draw(DrawingContext& context)
{
context.set_ambient_color( ambient_light );
context.push_transform();
context.set_translation(camera->get_translation());
for(auto i = gameobjects.begin(); i != gameobjects.end(); ++i) {
GameObjectPtr& object = *i;
if(!object->is_valid())
continue;
if (draw_solids_only)
{
TileMap* tm = dynamic_cast<TileMap*>(object.get());
if (tm && !tm->is_solid())
continue;
}
object->draw(context);
}
if(show_collrects) {
Color color(1.0f, 0.0f, 0.0f, 0.75f);
for(auto i = moving_objects.begin(); i != moving_objects.end(); ++i) {
MovingObject* object = *i;
const Rectf& rect = object->get_bbox();
context.draw_filled_rect(rect, color, LAYER_FOREGROUND1 + 10);
}
}
context.pop_transform();
}
HitResponse
Brick::collision(GameObject& other, const CollisionHit& hit_){
Player* player = dynamic_cast<Player*> (&other);
if (player) {
if (player->does_buttjump) try_break(player);
if (player->is_stone() && player->get_velocity().y >= 280) try_break(player); // stoneform breaks through bricks
}
BadGuy* badguy = dynamic_cast<BadGuy*> (&other);
if(badguy) {
// hit contains no information for collisions with blocks.
// Badguy's bottom has to be below the top of the brick
// SHIFT_DELTA is required to slide over one tile gaps.
if( badguy->can_break() && ( badguy->get_bbox().get_bottom() > bbox.get_top() + SHIFT_DELTA ) ){
try_break(player);
}
}
Portable* portable = dynamic_cast<Portable*> (&other);
if(portable) {
MovingObject* moving = dynamic_cast<MovingObject*> (&other);
if(moving->get_bbox().get_top() > bbox.get_bottom() - SHIFT_DELTA) {
try_break(player);
}
}
Explosion* explosion = dynamic_cast<Explosion*> (&other);
if(explosion && explosion->hurts()) {
try_break(player);
}
IceCrusher* icecrusher = dynamic_cast<IceCrusher*> (&other);
if(icecrusher && coin_counter == 0)
try_break(player);
return Block::collision(other, hit_);
}
HitResponse
BonusBlock::collision(GameObject& other, const CollisionHit& hit_){
Player* player = dynamic_cast<Player*> (&other);
if (player) {
if (player->does_buttjump)
try_drop(player);
}
BadGuy* badguy = dynamic_cast<BadGuy*> (&other);
if(badguy) {
// hit contains no information for collisions with blocks.
// Badguy's bottom has to be below the top of the block
// SHIFT_DELTA is required to slide over one tile gaps.
if( badguy->can_break() && ( badguy->get_bbox().get_bottom() > bbox.get_top() + SHIFT_DELTA ) ){
try_open(player);
}
}
Portable* portable = dynamic_cast<Portable*> (&other);
if(portable) {
MovingObject* moving = dynamic_cast<MovingObject*> (&other);
if(moving->get_bbox().get_top() > bbox.get_bottom() - SHIFT_DELTA) {
try_open(player);
}
}
return Block::collision(other, hit_);
}
bool
MrIceBlock::collision_squished(GameObject& object)
{
switch(ice_state) {
case ICESTATE_KICKED:
case ICESTATE_NORMAL:
squishcount++;
if(squishcount >= MAXSQUISHES) {
kill_fall();
return true;
}
set_state(ICESTATE_FLAT);
nokick_timer.start(NOKICK_TIME);
break;
case ICESTATE_FLAT:
{
MovingObject* movingobject = dynamic_cast<MovingObject*>(&object);
if (movingobject && (movingobject->get_pos().x < get_pos().x)) {
dir = RIGHT;
} else {
dir = LEFT;
}
}
if (nokick_timer.check()) set_state(ICESTATE_KICKED);
break;
case ICESTATE_GRABBED:
assert(false);
break;
}
Player* player = dynamic_cast<Player*>(&object);
if (player) player->bounce(*this);
return true;
}
void NewCharacterReadListener::onEvent(const std::string &_eventType, Event* _event)
{
MovingObject *character = _event->GetMovingObject();
if (character->GetName() == "Mario")
m_gameEngine->SetMarioInitialPosition(character->GetPosition());
m_gameEngine->AddCharacterToArray(character);
m_gameEngine->AddForegroundItemToArray(character);
}
void GameEngine::UpdateCharacterPosition(MovingObject& _character, float _dt)
{
unsigned int id = _character.GetID();
_character.UpdatePosition(_dt);
sf::Vector2f pos = _character.GetPosition();
m_listForegroundItems[id]->SetX(pos.x);
m_listForegroundItems[id]->SetY(pos.y);
}
void CollisionHandler::ReactToCollisionsWithObj(MovingObject& _obj, DisplayableObject& _ref, CollisionDirection _direction)
{
ReactToCollision(_obj, _ref.GetCoordinates(), _direction);
_obj.UpdateAfterCollision(Util::OppositeCollisionDirection(_direction), _ref.GetClass()); // Updates the state of the object, not its coordinates
_obj.SetPosition(m_gameEngine->GetCoordinatesOfForegroundItem(_obj.GetID()));
_ref.UpdateAfterCollision(_direction, _obj.GetClass());
SendNewObjectPositionToGFX(_ref);
}
void Game::getInput()
{
m_player->doSomething();
for (list<MovingObject*>::iterator it = m_movingobjects.begin(); it != m_movingobjects.end(); it++)
{
MovingObject* current = *it;
current->doSomething();
if (m_reset)
return;
}
}
bool
MrIceBlock::collision_squished(GameObject& object)
{
Player* player = dynamic_cast<Player*>(&object);
if(player && (player->does_buttjump || player->is_invincible())) {
player->bounce(*this);
kill_fall();
return true;
}
switch(ice_state) {
case ICESTATE_KICKED:
{
BadGuy* badguy = dynamic_cast<BadGuy*>(&object);
if (badguy) {
badguy->kill_fall();
break;
}
}
// fall through
case ICESTATE_NORMAL:
{
squishcount++;
if (squishcount >= MAXSQUISHES) {
kill_fall();
return true;
}
}
set_state(ICESTATE_FLAT);
nokick_timer.start(NOKICK_TIME);
break;
case ICESTATE_FLAT:
{
MovingObject* movingobject = dynamic_cast<MovingObject*>(&object);
if (movingobject && (movingobject->get_pos().x < get_pos().x)) {
dir = RIGHT;
} else {
dir = LEFT;
}
}
if (nokick_timer.check()) set_state(ICESTATE_KICKED);
break;
case ICESTATE_GRABBED:
assert(false);
break;
}
if (player) player->bounce(*this);
return true;
}
bool
Snail::collision_squished(GameObject& object)
{
if (m_frozen)
return WalkingBadguy::collision_squished(object);
Player* player = dynamic_cast<Player*>(&object);
if (player && (player->m_does_buttjump || player->is_invincible())) {
kill_fall();
player->bounce(*this);
return true;
}
switch (state) {
case STATE_KICKED:
case STATE_NORMAL:
// Can't stomp in midair
if (!on_ground())
break;
squishcount++;
if (squishcount >= MAX_SNAIL_SQUISHES) {
kill_fall();
return true;
}
SoundManager::current()->play("sounds/stomp.wav", get_pos());
be_flat();
break;
case STATE_FLAT:
SoundManager::current()->play("sounds/kick.wav", get_pos());
{
MovingObject* movingobject = dynamic_cast<MovingObject*>(&object);
if (movingobject && (movingobject->get_pos().x < get_pos().x)) {
m_dir = Direction::RIGHT;
} else {
m_dir = Direction::LEFT;
}
}
be_kicked();
break;
case STATE_GRABBED:
case STATE_KICKED_DELAY:
break;
}
if (player) player->bounce(*this);
return true;
}
void Row::addMovingObjects(std::string type, int distanceBetween, int num ){
MovingObject* first = getMovingObject(type);
distanceBetweenMovingObjects = distanceBetween;
float x = first->getX();
int width = first->getWidth();
movingObjects.push_back(first);
for(int i =1; i < num; i++){
x -= (distanceBetween + width);
MovingObject* entry = getMovingObject(type);
entry->setX(x);
movingObjects.push_back(entry);
}
}
void Row::addMovingObject(std::string type){
MovingObject * newMovingObject = getMovingObject(type);
if(movingObjects.size() >0){
MovingObject * lastMovingObject = movingObjects.at(movingObjects.size()-1);
float x = lastMovingObject->getX();
int width = lastMovingObject->getWidth();
newMovingObject->setX(x - distanceBetweenMovingObjects -width );
}
movingObjects.push_back(newMovingObject);
}
Vector4 SteeringBehavior::evade(Handle &p_pursuer_handle){
IHasHandle* tmp;
MovingObject* pursuer;
Vector4 toPursuer;
float look_ahead_time;
tmp = theWorld.get(p_pursuer_handle);
if (pursuer = dynamic_cast<MovingObject*>(tmp)){
toPursuer = pursuer->getPosition() - owner->getPosition();
look_ahead_time = toPursuer.length() / (owner->getMaxSpeed() + pursuer->getSpeed());
return flee(pursuer->getPosition() + pursuer->getVelocity() * look_ahead_time);
}
else {
off(BehaviorType::evade);
}
return Vector4();
}
// Broadcast character's position
void GameEngine::SendCharacterPosition(int _indexCharacter)
{
MovingObject *character = m_characters[_indexCharacter];
if (character == NULL || character->IsDead())
return;
InfoForDisplay info = character->GetInfoForDisplay();
Event posInfo(&info);
m_eventEngine->dispatch(CHAR_POS_UPDATED, &posInfo);
#ifdef DEBUG_MODE
if (_indexCharacter == m_indexMario)
{
*m_debugInfo = character->GetDebugInfo();
Event debugInfo(m_debugInfo);
m_eventEngine->dispatch(DEBUG_INFO_UPDATED, &debugInfo);
}
#endif
}
void
Sector::collision_tilemap(collision::Constraints* constraints,
const Vector& movement, const Rectf& dest,
MovingObject& object) const
{
// calculate rectangle where the object will move
float x1 = dest.get_left();
float x2 = dest.get_right();
float y1 = dest.get_top();
float y2 = dest.get_bottom();
for(auto i = solid_tilemaps.begin(); i != solid_tilemaps.end(); i++) {
TileMap* solids = *i;
// test with all tiles in this rectangle
Rect test_tiles = solids->get_tiles_overlapping(Rectf(x1, y1, x2, y2));
for(int x = test_tiles.left; x < test_tiles.right; ++x) {
for(int y = test_tiles.top; y < test_tiles.bottom; ++y) {
const Tile* tile = solids->get_tile(x, y);
if(!tile)
continue;
// skip non-solid tiles
if(!tile->is_solid ())
continue;
Rectf tile_bbox = solids->get_tile_bbox(x, y);
/* If the tile is a unisolid tile, the "is_solid()" function above
* didn't do a thorough check. Calculate the position and (relative)
* movement of the object and determine whether or not the tile is
* solid with regard to those parameters. */
if(tile->is_unisolid ()) {
Vector relative_movement = movement
- solids->get_movement(/* actual = */ true);
if (!tile->is_solid (tile_bbox, object.get_bbox(), relative_movement))
continue;
} /* if (tile->is_unisolid ()) */
if(tile->is_slope ()) { // slope tile
AATriangle triangle;
int slope_data = tile->getData();
if (solids->get_drawing_effect() & VERTICAL_FLIP)
slope_data = AATriangle::vertical_flip(slope_data);
triangle = AATriangle(tile_bbox, slope_data);
collision::rectangle_aatriangle(constraints, dest, triangle,
solids->get_movement(/* actual = */ false));
} else { // normal rectangular tile
check_collisions(constraints, movement, dest, tile_bbox, NULL, NULL,
solids->get_movement(/* actual = */ false));
}
}
}
}
}
HitResponse
Brick::collision(GameObject& other, const CollisionHit& hit){
BadGuy* badguy = dynamic_cast<BadGuy*> (&other);
if(badguy) {
// hit contains no information for collisions with blocks.
// Badguy's bottom has to be below the top of the brick
// +7 is required to slide over one tile gaps.
if( badguy->can_break() && ( badguy->get_bbox().get_bottom() > get_bbox().get_top() + 7.0 ) ){
try_break(false);
}
}
Portable* portable = dynamic_cast<Portable*> (&other);
if(portable) {
MovingObject* moving = dynamic_cast<MovingObject*> (&other);
if(moving->get_bbox().get_top() > get_bbox().get_bottom() - 7.0) {
try_break();
}
}
return Block::collision(other, hit);
}
HitResponse
BicyclePlatform::collision(GameObject& other, const CollisionHit& )
{
// somehow the hit parameter does not get filled in, so to determine (hit.top == true) we do this:
MovingObject* mo = dynamic_cast<MovingObject*>(&other);
if (!mo) return FORCE_MOVE;
if ((mo->get_bbox().p2.y) > (bbox.p1.y + 2)) return FORCE_MOVE;
Player* pl = dynamic_cast<Player*>(mo);
if (pl) {
if (pl->is_big()) momentum += 0.1 * Sector::current()->get_gravity();
Portable* po = pl->get_grabbed_object();
MovingObject* pomo = dynamic_cast<MovingObject*>(po);
if (contacts.insert(pomo).second) momentum += 0.1 * Sector::current()->get_gravity();
}
if (contacts.insert(&other).second) momentum += 0.1 * Sector::current()->get_gravity();
return FORCE_MOVE;
}
HitResponse
PneumaticPlatform::collision(GameObject& other, const CollisionHit& )
{
// somehow the hit parameter does not get filled in, so to determine (hit.top == true) we do this:
MovingObject* mo = dynamic_cast<MovingObject*>(&other);
if (!mo) return FORCE_MOVE;
if ((mo->get_bbox().p2.y) > (get_bbox().p1.y + 2)) return FORCE_MOVE;
Player* pl = dynamic_cast<Player*>(mo);
if (pl) {
if (pl->is_big()) contacts.insert(0);
Portable* po = pl->get_grabbed_object();
MovingObject* pomo = dynamic_cast<MovingObject*>(po);
if (pomo) contacts.insert(pomo);
}
contacts.insert(&other);
return FORCE_MOVE;
}
void
Bomb::ungrab(MovingObject& object, Direction dir_)
{
this->dir = dir_;
// portable objects are usually pushed away from Tux when dropped, but we
// don't want that, so we set the position
//FIXME: why don't we want that? shouldn't behavior be consistent?
set_pos(object.get_pos() + Vector(dir_ == LEFT ? -16 : 16, get_bbox().get_height()*0.66666 - 32));
set_colgroup_active(COLGROUP_MOVING);
grabbed = false;
}
bool
Igel::can_see(const MovingObject& o) const
{
Rectf ob = o.get_bbox();
bool inReach_left = ((ob.p2.x < bbox.p1.x) && (ob.p2.x >= bbox.p1.x-((dir == LEFT) ? RANGE_OF_VISION : 0)));
bool inReach_right = ((ob.p1.x > bbox.p2.x) && (ob.p1.x <= bbox.p2.x+((dir == RIGHT) ? RANGE_OF_VISION : 0)));
bool inReach_top = (ob.p2.y >= bbox.p1.y);
bool inReach_bottom = (ob.p1.y <= bbox.p2.y);
return ((inReach_left || inReach_right) && inReach_top && inReach_bottom);
}
Vector4 SteeringBehavior::offsetPursuit(Handle &p_leader, Vector4 &offset) {
MovingObject* leader = dynamic_cast<MovingObject*>(theWorld.get(p_leader));
if (leader == nullptr) {
// Leader does not exist anymore
off(BehaviorType::offset_pursuit);
return Vector4(0, 0, 0);
}
// calculate the offset's position in world space
Vector4 WorldOffsetPos = leader->getPosition() + offset;
Vector4 ToOffset = WorldOffsetPos - owner->getPosition();
// The lookahead time is propotional to the distance between the leader
// and the pursuer; and is inversely proportional to the sum of both
// agent's velocities
float LookAheadTime = ToOffset.length() / (owner->getMaxSpeed() + leader->getSpeed());
// Arrive at the predicted future position of the offset
return arrive(WorldOffsetPos + leader->getVelocity() * LookAheadTime, fast);
}
void CollisionHandler::HandleCollisionsWithMapEdges(MovingObject& _obj)
{
if (_obj.GetPosition().x < 0)
{
_obj.UpdateAfterCollisionWithMapEdge(CollisionDirection::LEFT, _obj.GetPosition().x);
}
float gapRightEdge = _obj.GetPosition().x - (m_levelSize.x - _obj.GetCoordinates().width);
if (gapRightEdge > 0)
{
_obj.UpdateAfterCollisionWithMapEdge(CollisionDirection::RIGHT, gapRightEdge);
}
if (_obj.GetPosition().y > m_levelSize.y)
_obj.Kill();
}
//TODO: fix shoot direciton and, if possible amount of objects created
void NPC::ShootMissile()
{
if (!m_flags[eAttacking])
{
//TODO: this isn't properly cleaned up. Also need to add it to Level's object lists
//All in all we need a better way to create projectiles
MovingObject* missile = new MovingObject(m_graphicContext, *m_resourceManager, m_position.x, m_position.y, "Missile");
missile->ConnectSlots(*m_drawSignal, *m_updateSignal);
missile->SetEnvList(m_environment);
missile->SetDirection(m_direction);
if (missile->GetDirection() == eLeft) {
missile->SetSpeed(eXSpeed, -missile->GetSpeed(eXSpeed));
}
StartAttack();
missile->StartMoving(m_direction);
m_timeSinceLastAttack = CL_System::get_time();
}
}
void NPC::ShootArrow()
{
if (!m_flags[eAttacking])
{
//TODO: this isn't properly cleaned up.
MovingObject* arrow = new MovingObject(m_graphicContext, *m_resourceManager, m_position.x, m_position.y, "Arrow");
arrow->ConnectSlots(*m_drawSignal, *m_updateSignal);
arrow->SetEnvList(m_environment);
double launchAngle = Utility::CalculateTrajectory(arrow->GetPosition(), m_target->GetPosition(), arrow->GetSpeed(eCompositeSpeed), true);
arrow->SetSpeed(eXSpeed, arrow->GetSpeed(eCompositeSpeed) * sin(launchAngle));
arrow->SetSpeed(eYSpeed, arrow->GetSpeed(eCompositeSpeed) * cos(launchAngle));
StartAttack();
arrow->StartMoving(m_direction);
}
}
// Handles collisions between the object and all the DisplayableObjects in m_listForegroundItems and with the map edges: detection and reaction.
void GameEngine::HandleCollisions(MovingObject& _obj)
{
if (m_listForegroundItems.size() <= 1)
return;
CollisionDirection tmpDirection = NO_COL;
if (_obj.CanCollide())
{
// What happens if there is a collision so _obj is moved and there is another one and _obj is moved again ? The first collision would need to be handled again
for (std::map<unsigned int, DisplayableObject*>::iterator it = m_listForegroundItems.begin(); it != m_listForegroundItems.end(); ++it)
{
tmpDirection = m_collisionHandler->DetectCollisionWithObj(_obj, *(it->second));
if (tmpDirection != NO_COL)
{
m_collisionHandler->ReactToCollisionsWithObj(_obj, *(m_listForegroundItems[it->first]), tmpDirection);
}
}
}
m_collisionHandler->HandleCollisionsWithMapEdges(_obj);
}
Vector4 SteeringBehavior::pursuit(Handle &p_evader_handle){
IHasHandle* tmp;
MovingObject* evader;
Vector4 toEvader;
float relativeHeading, look_ahead_time;
tmp = theWorld.get(p_evader_handle);
if (evader = dynamic_cast<MovingObject*>(tmp)){
toEvader = evader->getPosition() - owner->getPosition();
relativeHeading = evader->getHeading().dot(owner->getHeading());
if (toEvader.dot(owner->getHeading()) > 0 && relativeHeading < -0.95){
return this->seek(evader->getPosition());
}
look_ahead_time = toEvader.length() / (owner->getMaxSpeed() + evader->getSpeed());
return seek(evader->getPosition() + evader->getVelocity() * look_ahead_time);
}
else {
off(BehaviorType::pursuit);
}
return Vector4(0, 0, 0);
}
void
AngryStone::active_update(float elapsed_time) {
BadGuy::active_update(elapsed_time);
if (frozen) {
return;
}
switch (state) {
case IDLE: {
MovingObject* player = get_nearest_player();
if(player) {
MovingObject* badguy = this;
const Vector playerPos = player->get_pos();
const Vector badguyPos = badguy->get_pos();
float dx = (playerPos.x - badguyPos.x);
float dy = (playerPos.y - badguyPos.y);
float playerHeight = player->get_bbox().get_height();
float badguyHeight = badguy->get_bbox().get_height();
float playerWidth = player->get_bbox().get_width();
float badguyWidth = badguy->get_bbox().get_width();
if ((dx > -playerWidth) && (dx < badguyWidth)) {
if (dy > 0) {
attackDirection.x = 0;
attackDirection.y = 1;
} else {
attackDirection.x = 0;
attackDirection.y = -1;
}
if ((attackDirection.x != oldWallDirection.x) || (attackDirection.y != oldWallDirection.y)) {
sprite->set_action("charging");
timer.start(CHARGE_TIME);
state = CHARGING;
}
} else if ((dy > -playerHeight) && (dy < badguyHeight)) {
if (dx > 0) {
attackDirection.x = 1;
attackDirection.y = 0;
} else {
attackDirection.x = -1;
attackDirection.y = 0;
}
if ((attackDirection.x != oldWallDirection.x) || (attackDirection.y != oldWallDirection.y)) {
sprite->set_action("charging");
timer.start(CHARGE_TIME);
state = CHARGING;
}
}
}
} break;
case CHARGING: {
if (timer.check()) {
sprite->set_action("attacking");
timer.start(ATTACK_TIME);
state = ATTACKING;
physic.enable_gravity(false);
physic.set_velocity_x(CHARGE_SPEED * attackDirection.x);
physic.set_velocity_y(CHARGE_SPEED * attackDirection.y);
oldWallDirection.x = 0;
oldWallDirection.y = 0;
}
} break;
case ATTACKING: {
if (timer.check()) {
timer.start(RECOVER_TIME);
state = RECOVERING;
sprite->set_action("idle");
physic.enable_gravity(true);
physic.set_velocity_x(0);
physic.set_velocity_y(0);
}
} break;
case RECOVERING: {
if (timer.check()) {
state = IDLE;
sprite->set_action("idle");
physic.enable_gravity(true);
physic.set_velocity_x(0);
physic.set_velocity_y(0);
}
} break;
}
}
void
Explosion::explode()
{
if (state != STATE_WAITING)
return;
state = STATE_EXPLODING;
set_action(hurt ? "default" : "pop", 1);
sprite->set_animation_loops(1); //TODO: this is necessary because set_action will not set "loops" when "action" is the default action
sprite->set_angle(graphicsRandom.randf(0, 360)); // a random rotation on the sprite to make explosions appear more random
SoundManager::current()->play(hurt ? "sounds/explosion.wav" : "sounds/firecracker.ogg", get_pos());
#if 0
// spawn some particles
// TODO: provide convenience function in MovingSprite or MovingObject?
for (int i = 0; i < 100; i++) {
Vector ppos = bbox.get_middle();
float angle = graphicsRandom.randf(-M_PI_2, M_PI_2);
float velocity = graphicsRandom.randf(450, 900);
float vx = sin(angle)*velocity;
float vy = -cos(angle)*velocity;
Vector pspeed = Vector(vx, vy);
Vector paccel = Vector(0, 1000);
Sector::current()->add_object(new SpriteParticle("images/objects/particles/explosion.sprite", "default", ppos, ANCHOR_MIDDLE, pspeed, paccel, LAYER_OBJECTS-1));
}
#endif
if (push) {
Vector center = get_bbox ().get_middle ();
std::vector<MovingObject*> near_objects = Sector::current()->get_nearby_objects (center, 10.0 * 32.0);
for (size_t i = 0; i < near_objects.size (); i++) {
MovingObject *obj = near_objects[i];
Vector obj_vector = obj->get_bbox ().get_middle ();
Vector direction = obj_vector - center;
float distance = direction.norm ();
/* If the distance is very small, for example because "obj" is the badguy
* causing the explosion, skip this object. */
if (distance <= 1.0)
continue;
/* The force decreases with the distance squared. In the distance of one
* tile (32 pixels) you will have a speed increase of 150 pixels/s. */
float force = 150.0 * 32.0*32.0 / (distance * distance);
if (force > 200.0)
force = 200.0;
Vector add_speed = direction.unit () * force;
Player *player = dynamic_cast<Player *> (obj);
if (player) {
player->add_velocity (add_speed);
}
WalkingBadguy *badguy = dynamic_cast<WalkingBadguy *> (obj);
if (badguy) {
badguy->add_velocity (add_speed);
}
} /* for (i = 0 ... near_objects) */
} /* if (push) */
}