Question

So I got tileset like this: Tileset

How do I load only one tile from it in SFML?

Answer 1

Load the image into a texture (either sf::Image if using SFML 1.6, or sf::Texture if using SFML 2.0), and then set the sub-rect for the sprite. Something like this (using SFML 2.0):

sf::Texture texture;
texture.loadFromFile("someTexture.png"); // just load the image into a texture

sf::IntRect subRect;
subRect.left = 100; // of course, you'll have to fill it in with the right values...
subRect.top = 175;
subRect.width = 80;
subrect.height = 90;

sf::Sprite sprite(texture, subRect);

// If you ever need to change the sub-rect, use this:
sprite.setTextureRect(someOtherSubRect);

For SFML 1.6, it’s more like this:

sf::Image image;
image.LoadFromFile("someTexture.png"); // just load the image into a texture

sf::IntRect subRect;
subRect.Left = 100; // of course, you'll have to fill it in with the right values...
subRect.Top = 175;
subRect.Right = 180;
subrect.Bottom = 265;

sf::Sprite sprite(image);
sprite.SetSubRect(subRect);

Note that you may want to disable smoothing for the image/texture, depending on how you’re using your sprites. If you don’t disable smoothing, the edges may bleed (like texture.setSmooth(false) or image.SetSmooth(false)).