How to draw a single pixel?

[nbd]

Is there a simple way to draw a single pixel with SFML API? Something like SetPixel() in Windows GDI API?

There is a four-year old thread on this forum where addition of such a function were considered useful:

http://en.sfml-dev.org/forums/index.php?topic=1008.msg6426#msg6426

[Rhimlock]

You could use a VertexArray of Points.

[eXpl0it3r]

What exactly are you trying to achieve?

Yes, you can use a vertex array of points.
Otherwise you could use a rectangle shape with size 1x1 or a sprite.

Depending on what you want to do, you might want to look into shaders.

And if you want to edit pixels, you could think about using an sf::Image or your own vector of sf::Uint8.

[Jesper Juhl]

You could use a 1x1 pixel sprite, a 1x1 RectangleShape, a line with two vertices at the same position (I would guess) and maybe a shader could be used but I'm not sure.

[nbd]

What exactly are you trying to achieve?

Yes, you can use a vertex array of points.
Otherwise you could use a rectangle shape with size 1x1 or a sprite.

Depending on what you want to do, you might want to look into shaders.

And if you want to edit pixels, you could think about using an sf::Image or your own vector of sf::Uint8.

I want to draw a circle sector (arc). Is there a convenient way to do it with SFML without drawing individual pixels? In other thread for this task a Thor library was recommended:

http://en.sfml-dev.org/forums/index.php?topic=5609.msg36676#msg36676

[Jesper Juhl]

One way to do it would be to draw a (say white) sf::CircleShape on a black background. Then draw a black sf::ConvexShape on top of it to erase the part of the circle you don't want. If you don't want the circle to be solid, but just a "ring", then draw a smaller black sf::CircleShape with the same center as the first on top as well. End result should be what you want I believe.

[eXpl0it3r]

Seems like the Pie shape got removed from Thor in version 2.x and using 1.1 is not really an option imho.

If the arc should be 1/4 or 1/2 of the full circle you could also draw it to a render texture that has only the size of 1/4 or 1/2. Otherwise drawing points or small lines with a vertex array might work well enough.

[nbd]

Thanks for the responses. I'll try to use a vertex array.