Topics

1

General / Determining if player is on air/ground

« on: January 13, 2016, 04:06:17 pm »

I've implemented some gravity and collision in my 2d side-scroller/platformer game, but i needed to know if the player is currently grounded or mid-air. I really can't think of anything, especially because I can't define a fixed minimum height (because of the tilemap i've implemented can have some weird combinations and i would like to avoid imposing limits to the level design).

Anyone has an interesting insight on this?

Maybe I'm just looking at it from the wrong perspective...

2

Graphics / Culling problem

« on: December 13, 2015, 06:08:00 pm »

Hello, I've been trying to implement a culling algorithm in my game, but instead of only calling draw() when the tiles are in view, it draws everything untill the camera starts moving (side-scroller camera). After that, it just stops drawing everything.

Here's my best attempt so far:

        sf::View cam = target.getView();
    sf::FloatRect screenRect(sf::Vector2f(
                cam.getCenter().x - (cam.getSize().x/2.f),
                cam.getCenter().y - (cam.getSize().y/2.f)),
                cam.getSize());

        for (int i = 0; i < m_map.size(); i++)
        {
                for (int j = 0; j < m_map[i].size(); j++)
                {
                        if (m_map[i][j].x != -1 && m_map[i][j].y != -1 && screenRect.intersects(sf::FloatRect(m_map[i][j].x * 32, m_map[i][j].y * 32, 32, 32)))
                        {
                                m_tilesprite.setPosition(j * tileSize, i * tileSize);
                                m_tilesprite.setTextureRect(sf::IntRect(m_map[i][j].x * tileSize, m_map[i][j].y * tileSize, tileSize, tileSize));
                                target.draw(m_tilesprite);
                        }
                }
        }

m_map is a 2d vector of sf::Vector2i that contains coordinates for tiles in the current level.

What am I doing wrong?