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Help => Graphics => Topic started by: CrowbarJones on March 22, 2023, 07:30:29 am

Title: A question about scrolling the view in SFML Graphics
Post by: CrowbarJones on March 22, 2023, 07:30:29 am

According to the tutorials, to use a view we must call a setView function before drawing. The problem is that I have a big game map which is much bigger than the window; I use the view to display a part of the map on the window, but I want to show a different part of the map when the player scrolls the mouse wheel. So I need to change the view, but to do that, I need to call setView again and draw everything again. Everything here is a very very big map, so the window display them with completely delay and no smooth. Is there any other (and more useful) way to change the view?
Thanks!

Title: Re: A question about scrolling the view in SFML Graphics
Post by: eXpl0it3r on March 22, 2023, 05:22:03 pm

If you want to display the same content twice, you have to ... draw the same content twice. :D

You can use a RenderTexture to "cache" the output, so instead of drawing the whole scene twice, you'd just have to draw a sprite twice.
If your rendering becomes too slow, you may also consider applying your own culling for the parts that are currently not visible on the screen.