Afterimages while fast scrolling screen

[underww]

While scrolling the game screen, it isn't clear because of afterimages.

It is not a serious problem but, I want to fix this.

I guess this problem related with double buffering.

I'm already using vertical sync, but it doesn't help to fix this problem.

I'm using sf::View to scroll the screen.

Here's some sample code.

// view.move(0.f, 1.f); // this works well
// view.move(0.f, 2.f); // this works well too
view.move(0.f, 3.f); // the problem happens here

window.clear();
window.setView(view);
window.draw();
window.display();
 

Thanks

[eXpl0it3r]

Can you explain further what you mean with "afterimages", i.e. can you post a screenshot?

Do you have an Intel graphics card? If not what's your GPU and which OS do you use?

[underww]

Sorry for my lack of explanation.

I have a Geforce graphics card (GTX 650 Ti Boost) and use Windows 8.1 x64.

And I use SFML 2.1 stable version and latest build.

It is a bit hard to explain. It's similar to screen tearing and flickering issues.

While scrolling the screen quickly, images are a blur.

And I found that it looks because of the image before clear the window.

So I think it is a problem related with double buffering.

It can't be captured in a screenshot, but when it happens I can see.

[Nexus]

Do you strictly adhere to the clear-draw-display cycle, in exactly this order and with no exceptions?

Might it just be that your framerate is too low, so that the eye doesn't observe the movement/scrolling as smooth? What if you enable VSync?

[underww]

Yes, I use VSync and framerate is 60.
I can say it is not about clear-draw-display cycle problem.

It doesn't happen with low speed scrolling.
Like an example code, 1.0f ~ 2.0f move per frame is very clear.

[wintertime]

Are you maybe just observing the inherent property of a monitor in that it is adapting pixel colors slowly to the requested value? Maybe try a better monitor?

[underww]

Ok, Thanks for replying everyone.
I thought it can be handled with triple buffering or other techniques.
But as you said, it may the problem with hardware such as a monitor.
I will test it on other systems later.

[Raincode]

Just saying, in case this is how you did it, I remember reading using Vsync and setting a limited framerate via SFML isn't a good idea...

Kind Regards

[eXpl0it3r]

You might want to create a minimal example that reproduces the artifacts, so we could see if it's the code and if not test it on our ends.

[BaneTrapper]

I had issues my self similar to theese my gpu was set to force some stuff like motion blur etc...
Thus giving me unclear screen when moving view fast.