Messages

1

SFML wiki / Frame Interpolation Example

« on: December 14, 2024, 07:43:25 pm »

Hello,

I had trouble finding an SFML specific example of frame interpolation, so I made one and put it on the wiki.

https://github.com/SFML/SFML/wiki/Frame-Interpolation-Example

2

Graphics / Re: Vertex Array inconsistency across GPUs?

« on: December 14, 2024, 08:13:27 am »

Thank you very much for the explanation. So, using instead 2 triangles...

This gives new.png (rtx4060):

        BG1[0].position = BottomLeft;
        BG1[1].position = BottomRight;
        BG1[2].position = TopLeft;

        BG1[0].color = sf::Color(255,   0,   0, 255);
        BG1[1].color = sf::Color(  0,   0,   0,   0);
        BG1[2].color = sf::Color(  0,   0,   0,   0);


        BG2[0].position = TopRight;
        BG2[1].position = TopLeft;
        BG2[2].position = BottomRight;

        BG2[0].color = sf::Color(255, 255, 255, 255);
        BG2[1].color = sf::Color(  0,   0,   0,   0);
        BG2[2].color = sf::Color(  0,   0,   0,   0);

And this gives old.png (gtx960):

        BG1[0].position = TopLeft;
        BG1[1].position = BottomLeft;
        BG1[2].position = TopRight;

        BG1[0].color = sf::Color(  0,   0,   0,   0);
        BG1[1].color = sf::Color(255,   0,   0, 255);
        BG1[2].color = sf::Color(255, 255, 255, 255);


        BG2[0].position = BottomRight;
        BG2[1].position = BottomLeft;
        BG2[2].position = TopRight;

        BG2[0].color = sf::Color(  0,   0,   0,   0);
        BG2[1].color = sf::Color(255,   0,   0, 255);
        BG2[2].color = sf::Color(255, 255, 255, 255);

3

Graphics / Vertex Array inconsistency across GPUs?

« on: December 13, 2024, 07:32:34 pm »

Hi there,

I recently decided to resume work on one of my old SFML games. After I setup SFML 2.6.2 on a new laptop and ran my code, I was surprised that my backgrounds, which I drew using Vertex Arrays, looked completely different.

In the attached images, you can see screenshots of the very same program ran on two different machines: one on a win10 PC with a GTX 960, and the other on a win11 PC with an RTX 4060.

Is it normal for different GPUs to draw the same Vertex Array in such a vastly different way?

        BG.setPrimitiveType(sf::Quads);
        BG.resize(4);

        BG[0].position = sf::Vector2f(0.f, 1080.f);
        BG[1].position = sf::Vector2f(0.f, 0.f);
        BG[2].position = sf::Vector2f(1920.f, 0.f);
        BG[3].position = sf::Vector2f(1920.f, 1080.f);

        BG[0].color = sf::Color(255,0,0,255);
        BG[1].color = sf::Color(0,0,0,0);
        BG[2].color = sf::Color(255,255,255,255);
        BG[3].color = sf::Color(0,0,0,0);