Messages

1

General / fps spikes

« on: May 08, 2014, 02:13:29 am »

hello guys, Im not sure if I post this thread in correct category but I hope I do.

basically, my movement isn't smooth. I believe this happens because of huge fps spikes



...and here comes the code(which is very simple)
http://pastebin.com/qCkbWj0t

some more informations:
- i5
- gt330m
- ssd ocz drive
- windows 8.1
- visual studio express 2013
- sfml 2.1 built by me using cmake
- no difference between static or dynamic libs or release/debug

2

General / Re: diagonal movement = little shaking

« on: January 23, 2014, 06:37:04 am »

hello again.

I should have said this before but I have class Engine which has "update" method.

I have changed few things and now it looks like this:

void CEngine::run()
{
        while (window->isOpen())
        {
                handleEvents()
                update(m_deltatime.getElapsedTime());
                m_deltatime.restart();
                render();
        }
}

void CEngine::update(sf::Time deltatime)
{
        m_player->update(deltatime.asSeconds());
}

Player "update" method:

void CPlayer::update(float deltatime)
{
        if (sf::Keyboard::isKeyPressed(sf::Keyboard::Up))
        {
                m_sprite.setTextureRect(sf::IntRect(42, 0, 42, 42));
                m_vel.y = -169;
        }

        if (sf::Keyboard::isKeyPressed(sf::Keyboard::Down))
        {
                m_sprite.setTextureRect(sf::IntRect(0, 0, 42, 42));
                m_vel.y = 169;
        }

        if (sf::Keyboard::isKeyPressed(sf::Keyboard::Left))
        {
                m_sprite.setTextureRect(sf::IntRect(84, 0, 42, 42));
                m_vel.x = -169;

        }

        if (sf::Keyboard::isKeyPressed(sf::Keyboard::Right))
        {
                m_sprite.setTextureRect(sf::IntRect(126, 0, 42, 42));
                m_vel.x = 169;
        }


        if ((m_vel.x != 0) && (m_vel.y != 0)) m_vel /= sqrt(2.f);
        m_sprite.move(m_vel.x*deltatime, m_vel.y*deltatime);

        if (m_vel.x != 0) m_vel.x = 0;
        if (m_vel.y != 0) m_vel.y = 0;


}

Slight difference, maybe I have to live with that

3

General / diagonal movement = little shaking

« on: January 23, 2014, 04:30:20 am »

hello everyone!
I have a problem with my movement system.

        if (sf::Keyboard::isKeyPressed(sf::Keyboard::Up))
        {
                m_sprite.setTextureRect(sf::IntRect(42, 0, 42, 42));
                m_vel.y = -4;
        }

        if (sf::Keyboard::isKeyPressed(sf::Keyboard::Down))
        {
                m_sprite.setTextureRect(sf::IntRect(0, 0, 42, 42));
                m_vel.y = 4;
        }

        if (sf::Keyboard::isKeyPressed(sf::Keyboard::Left))
        {
                m_sprite.setTextureRect(sf::IntRect(84, 0, 42, 42));
                m_vel.x = -4;

        }

        if (sf::Keyboard::isKeyPressed(sf::Keyboard::Right))
        {
                m_sprite.setTextureRect(sf::IntRect(126, 0, 42, 42));
                m_vel.x = 4;
        }


        if ((m_vel.x != 0) && (m_vel.y != 0)) m_vel /= sqrt(2.f);
        m_sprite.move(m_vel.x, m_vel.y);

        if (m_vel.x != 0) m_vel.x = 0;
        if (m_vel.y != 0) m_vel.y = 0;
        }

My movement is very smooth when I move in straight lines but in other cases my character starts shaking.
I believe this line

if ((m_vel.x != 0) && (m_vel.y != 0)) m_vel /= sqrt(2.f);

is responsible for this issue. However I can't just delete it but I also want to get rid of this little shaking. Any ideas how can I do that?