Make a sprite darker

[Nice Guy]

Hello. I'm making a tile-based 2D game using SFML2. At the moment I'm working on a light system similar to the one found in Diablo, in which the (tiled) area gets darker the further it is from the player. Is there a way to reduce the light of a sprite? I tried to find information about this but didn't succeed. Something to do with shaders maybe?

I also have another question: how could I make a sprite black n white?

Thank you 

[Laurent]

Is there a way to reduce the light of a sprite?

Set its color to gray.

sf::Uint8 light = ...; // 255 = initial brightness, 0 = black
sprite.setColor(sf::Color(light, light, light));

I also have another question: how could I make a sprite black n white?

There's no built-in function for that, you must apply a black-and-white algorithm manually to all the pixels of the texture. Or do it in a fragment shader, if you want to apply this effect at runtime.

[Nice Guy]

Perfect! Thank you so much! 

[masskiller]

Check the HSL color standard in the wiki, it's a code sample I wrote that has a very complete explanation on how to do crazy things with colors.

Here's the link: https://github.com/SFML/SFML/wiki/Source%3A-HSL-Color