C++ sf::Time类代码示例

void Monster::update(const sf::Time & elapsed)
{
    c_LastAggroTime += elapsed;
    if(elapsed.asSeconds() < c_LostAggroTime && c_LastAggroTime.asSeconds() > c_LostAggroTime)
        c_LastAggroTime = sf::seconds(c_LostAggroTime);

    c_LastAtkTime += elapsed;
    if(elapsed.asSeconds() < c_DelayAtkTime && c_LastAtkTime.asSeconds() > c_DelayAtkTime)
        c_LastAtkTime = sf::seconds(c_DelayAtkTime);

    Living::update(elapsed);
}

NDistribution<sf::Time> uniform(sf::Time min, sf::Time max)
{
    assert(min <= max);

    const float floatMin = min.asSeconds();
    const float floatMax = max.asSeconds();

    return [=] () -> sf::Time
    {
        return sf::seconds(NMath::random(floatMin, floatMax));
    };
}

void cBkGrid::update(sf::Time dt)
{    
    mAccumulator += dt;
    if ( mAccumulator >= mTimer )
    {
        mAccumulator = sf::Time::Zero;
        adjustColor();
    }
    
    // Horizontal lines' velocity
    sf::Vector2f    dVhori { 0.0, mVelocity.y };
    dVhori *= dt.asSeconds();
    for (auto i = 0; i < gGridSize.y * 2; ++i)
    {
        mPoints[i].position += dVhori;
        
        if (mPoints[i].position.y < 0)
        {
            mPoints[i].position.y += mSize;
        }
        if (mPoints[i].position.y > mSize)
        {
            mPoints[i].position.y -= mSize;
        }
    }
    
    // Vertical lines' velocity
    sf::Vector2f    dVvert { mVelocity.x, 0.0 };
    dVvert *= dt.asSeconds();
    for (auto i = mFirstVline; i < gGridPointCount; ++i)
    {
        mPoints[i].position += dVvert;
        
        if (mPoints[i].position.x < 0)
        {
            mPoints[i].position.x += mSize;
        }
        if (mPoints[i].position.x > mSize)
        {
            mPoints[i].position.x -= mSize;
        }
    }
    
    // Now rotate
    mRot += mSpin * dt.asSeconds();
    if ( mRot < -360 ) mRot += 360;
    if ( mRot > 360 ) mRot -= 360;
    setRotation(mRot);
    
    // Adjust position
    setPosition(mHalfSize / 2.0, mHalfSize / 2.0);
}

void Entity::updateCurrent(sf::Time dt)
{
	if (hasFriction)
	{
		mVelocity.x *= FRICTION;
		mVelocity.y *= FRICTION;
	}
	if (hasGravity)
	{
		mVelocity.y += GRAVITY * dt.asSeconds();
	}
	move(mVelocity * dt.asSeconds());
}

void Player::update(const sf::Time& dt) {
	handleInput(dt);

	if (getPosition().x < 0) {
		move(m_speed * dt.asSeconds(), 0.0f);
	} else if (getPosition().x + getGlobalBounds().width > m_windowSize.x) {
		move(-m_speed * dt.asSeconds(), 0.0f);
	}

	m_spaceKey = sf::Keyboard::isKeyPressed(sf::Keyboard::Space);

	Entity::update(dt);
}

void SpeedupPullCamera::update(const sf::Time& frameTime)
{
	if (g_inputController->isKeyActive(Key::Up))
	{
		m_cameraTop -= CAMERA_SPEED_PER_S * frameTime.asSeconds();
		m_cameraCenter.y = m_cameraTop + (m_cameraWindowHeight / 2.f);
	}
	if (g_inputController->isKeyActive(Key::Down))
	{
		m_cameraTop += CAMERA_SPEED_PER_S * frameTime.asSeconds();
		m_cameraCenter.y = m_cameraTop + (m_cameraWindowHeight / 2.f);
	}
}

SoundManager::FadedMusic::FadedMusic(
    VFileMusic& music, float target, sf::Time fadeDuration):
    target(target),
    music(&music),
    increment(0)
{
    if (fadeDuration.asMicroseconds()) {
        music.setVolume(100 - target);
        increment = (target - music.getVolume()) / fadeDuration.asSeconds();
    } else {
        music.setVolume(target);
    }
}

void ParticleSystem::update(const sf::Time &dt) {
	if (emitRate > 0.0f) {
		emitWithRate(dt.asSeconds());
	}

	for (int i = 0; i < m_particles->countAlive; ++i) {
		m_particles->acc[i] = { 0.0f, 0.0f };
	}

	for (auto & updater : m_updaters) {
		updater->update(m_particles, dt.asSeconds());
	}
}

/*
 * Update
 */
void Bee::update(sf::Time dt)
{
	action(dt);
	move(dt);
	if(moveState_ == MoveState::REST){
		energy_ -= getConfig()["energy"]["consumption rates"]
		["idle"].toDouble()*dt.asSeconds();
	}else if(moveState_ == MoveState::TARGET ||
			 moveState_ == MoveState::RAND){
		energy_ -= getConfig()["energy"]["consumption rates"]
		["moving"].toDouble()*dt.asSeconds();
	}	
	if(energy_ <= 0){ throw energy_; }
}

void NotificationManager::update(sf::Time dt)
{
	if(notifications.size() == 0)
		return;

	sf::Text tmpText;
	tmpText.setCharacterSize(50);
	tmpText.setFont(NotificationFont);

	auto factor = (static_cast<float>(RenderWindow.getView().getSize().y) / RenderWindow.getSize().y);

	if(notifications[0].time > 0)
		notifications[0].time -= dt.asSeconds();					//Count down notification time
	else if(notifications[0].alpha - dt.asSeconds() * 150.f > 0)
		notifications[0].alpha -= dt.asSeconds() * 150.f;			//Hide notification
	else
		notifications.erase(this->notifications.begin());			//Delete notification

	for(auto i = 0u; i < notifications.size() && i < 5; i++)
	{
		/* Apply alpha to text and notification */
		tmpText.setFillColor
		({
			notificationTextColor.r,
			notificationTextColor.g,
			notificationTextColor.b,
			static_cast<sf::Uint8>(sfm::mapValue(notifications[i].alpha, 0.f, static_cast<float>(notificationBacgroundColor.a), 0.f, static_cast<float>(notificationTextColor.a)))
		 });
		notifications[i].background.setFillColor
		({
			notificationBacgroundColor.r,
			notificationBacgroundColor.g,
			notificationBacgroundColor.b,
			static_cast<sf::Uint8>(notifications[i].alpha)
		 });

		/* Set notification's background position */
		notifications[i].background.setScale(factor, factor);
		notifications[i].background.setPosition(RenderWindow.mapPixelToCoords({static_cast<int>(RenderWindow.getSize().x - 410), static_cast<int>(10 + i * 50)}));

		/* Set text parameters */
		tmpText.setScale(factor, factor);
		tmpText.setString(notifications[i].text);
		tmpText.setPosition(RenderWindow.mapPixelToCoords({static_cast<int>(RenderWindow.getSize().x - 410 + 10), static_cast<int>(10 + i * 50 - 15)}));

		/* Draw notification */
		RenderWindow.draw(notifications[i].background);
		RenderWindow.draw(tmpText);
	}
}

void EnemyActor::update(const sf::Time& delta_t)
{
	Actor::update(delta_t);
	
	if(delta_t.asSeconds() == 0.0)
		return;
		
	if (getState() == EnemyActor::Patrol || getState() == EnemyActor::Follow)
		patrolTimer -= delta_t.asSeconds();
	if (getState() == EnemyActor::Patrol && patrolTimer <= 0.0) {
		setNeedSeek(true);
		patrolTimer = patrolTimerMin;
	}
}

void MonsterEntity::update(sf::Time delta) {
	timer += delta.asSeconds();
	if (timer > .5) {
		swapAppearance();
		timer = 0;
	}
	if (type == monster_flyer) {
		move(velocity * delta.asSeconds());
	} else if (type == monster_crawler) {
		velocity.y += (gravity.y * delta.asSeconds());
		velocity.x -= (gravity.y * delta.asSeconds());
		move(velocity * delta.asSeconds());
	}
}

void Car::update(const sf::Time & _time) {
    
    // keep location as last valid
    if (!this->mDriftedOffTrack) {
        this->mCurrentPassedDistance += length(this->mCurrentLocation - this->mLastLocation);
        this->mLastLocation = this->mCurrentLocation;
        
       // std::cout << "Passed Distance: " << this->mCurrentPassedDistance << std::endl;
    }
    
    // compute cars offset to the track segment and adjust it
    sf::Vector2f proj = project(this->mCurrentLocation, this->mTrack[this->mSegmentStart], this->mTrack[this->mSegmentEnd]);
    sf::Vector2f positionAdjust = proj - this->mCurrentLocation;
   
    // apply drag friction
    if (this->mVelocity > 0.0f) {
       // this->mForce -= abs(Car::FRICTION_FORCE * (this->mVelocity) * (this->mDriftedOffTrack ? Car::DRAG_FRICTION_OFF_TRACK : Car::DRAG_FRICTION_ON_TRACK));
        this->mForce -= abs(Car::FRICTION_FORCE * (this->mVelocity));
        this->mForce -= abs(this->mIsAccelerating ? 0.0f : Car::BREAK_FRICTION * this->mVelocity);
        this->mForce -= abs(!this->mDriftedOffTrack ? 0.0f : Car::DRAG_FRICTION_OFF_TRACK * this->mVelocity);
        
        this->mIsAccelerating = false;
    }
    
    // compute acceleration A = F / M
    float acceleration = this->mForce / Car::DEFAULT_MASS;
    
    // compute velocity
    this->mVelocity += acceleration * _time.asSeconds();
    this->mVelocity = fmax(fmin(this->mVelocity, Car::MAX_VELOCITY), 0.0f);
    //std::cout << "Velocity: " << this->mVelocity << std::endl;
        
    // compute new position
    this->mCurrentLocation += this->mCurrentDirection * (this->mVelocity * _time.asSeconds());
    this->mCurrentLocation += positionAdjust;
    
    this->keepOnTrack();
    this->updateGhosts();
    
    // compute rotation
    float angle = heading(this->mCurrentDirection);
    
    this->mCarDrawable.setRotation(RAD_TO_DEG(angle));
    this->mCarDrawable.setPosition(this->mCurrentLocation);
    
    // debug stuff
    this->mLocationPoint.setPosition(this->mCurrentLocation);
    this->mDirectionShape.setPosition(this->mCurrentLocation);
}

void GameStateGame::Update(const sf::Time& time)
{
    SharedContext* context = m_stateMgr->GetContext();
    EntityBase   * player  = context->entityManager->Find("Player");
    if (!player)
    {
        std::cout << "Respawning player..." << std::endl;
        context->entityManager->Add(EntityType::Player, "Player");
        player = context->entityManager->Find("Player");
        player->SetPosition(m_gameMap->GetPlayerStart());
        std::cout << "Player respawned..." << std::endl;
    }
    else
    {
        m_view.setCenter(player->GetPosition());
        context->window->GetRenderWindow()->setView(m_view);
    }

    sf::FloatRect viewSpace = context->window->GetViewSpace();

    if (viewSpace.left <= 0)
    {
        m_view.setCenter(viewSpace.width / 2.0f, m_view.getCenter().y);
        context->window->GetRenderWindow()->setView(m_view);
    }
    else if (viewSpace.left + viewSpace.width > (m_gameMap->GetMapSize().x) * TILE_SIZE)
    {
        m_view.setCenter(((m_gameMap->GetMapSize().x) * TILE_SIZE) - (viewSpace.width / 2.0f),
                         m_view.getCenter().y);
        context->window->GetRenderWindow()->setView(m_view);
    }

    if (viewSpace.top <= 0)
    {
        m_view.setCenter(m_view.getCenter().x, viewSpace.height / 2.0f);
        context->window->GetRenderWindow()->setView(m_view);
    }
    else if (viewSpace.top + viewSpace.height >
             (m_gameMap->GetMapSize().y) * TILE_SIZE)
    {
        m_view.setCenter(m_view.getCenter().x,
                         ((m_gameMap->GetMapSize().y) *
                          TILE_SIZE) - (viewSpace.height / 2.0f));
        context->window->GetRenderWindow()->setView(m_view);
    }

    m_gameMap->Update(time.asSeconds());
    m_stateMgr->GetContext()->entityManager->Update(time.asSeconds());
}

void Link::update(sf::Time dt)
{
    if (sEngineRef().inputManager().keyboard().isKeyDown(imp_playerLeft->toBinding().Key))
        move(-64*dt.asSeconds(), 0);
    if (sEngineRef().inputManager().keyboard().isKeyDown(imp_playerRight->toBinding().Key))
        move(+64*dt.asSeconds(), 0);
    if (sEngineRef().inputManager().keyboard().isKeyDown(imp_playerUp->toBinding().Key))
        move(0, -64*dt.asSeconds());
    if (sEngineRef().inputManager().keyboard().isKeyDown(imp_playerDown->toBinding().Key))
        move(0, +64*dt.asSeconds());

    Player::update(dt);
    m_currentSprite->setPosition(m_pos);
    m_currentSprite->update(dt);
}