Messages

1

Graphics / How to optimize multiple draws

« on: May 21, 2021, 05:05:12 am »

Hi,
I'm working on a cellular automaton and I have to print a grid of cells with sfml.
It's working fine when cells are about less than 600, but when the grid gets bigger, the 600+ draw function calls really slow down the software. Is there any way to make it faster?

This is the problematic part of the code: the vector can contain up to 518400 elements, and with 600 it already starts to take some time to draw all.

           automatonWindow.clear()
           for(Person currentPerson : *evolutionIterator){
                //Set cell color according to it's status
                personCell.setPosition(x, y);
                automatonWindow.draw(personCell);
            }
            automatonWindow.display()
           

2

Graphics / Window in tutorial code doesn't close (+ openGL error)

« on: April 24, 2021, 02:20:51 pm »

Hi, I'm using ubuntu 20.04 on windows, and I was following the linux tutorial at this link:
https://www.sfml-dev.org/tutorials/2.5/start-linux.php
The problem is: when I try to run the code in that tutorial the window doesn't close if I try to close it unless I remove the "window.display();" function from the code. If I do so, the window is black and I can close it.
Plus, the following text appear as standard output:

Failed to enable udev monitor, joystick connections and disconnections won't be notified: -22
Warning: The created OpenGL context does not fully meet the settings that were requested
Requested: version = 1.1 ; depth bits = 0 ; stencil bits = 0 ; AA level = 0 ; core = false ; debug = false ; sRGB = false
Created: version = 0.0 ; depth bits = 0 ; stencil bits = 0 ; AA level = 0 ; core = false ; debug = false ; sRGB = false
Setting vertical sync failed
sfml-graphics requires support for OpenGL 1.1 or greater
Ensure that hardware acceleration is enabled if available

How can I solve this?