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1

Graphics / Vertex Array giving coluor to texture

« on: May 18, 2016, 04:39:27 am »

Hello ,

I know that you can add colour to the vertex but if i want to use a texture atlas . Is it possible to only change colour of it . Lets say i want to add green colour to brick instead of changing the texture itself in photoshop

Regards Ashley

2

Graphics / using vertexArray drops fps massively

« on: April 03, 2015, 01:37:40 pm »

Hello, ı was looking for a way to draw tile in game dynamically(edit or change at run time). I though of is i use vertexarray it can be done. Well it does the job excellently but fps drops very quick.
Commended vertex code (release ) = 2000+-
UnCommended vertex code (release) = 21+-1

There is massive difference in fps

int main()
{
        sf::RenderWindow window(sf::VideoMode(800, 800), "SFML works!");
        sf::CircleShape shape(100.f);
        shape.setFillColor(sf::Color::Green);
        sf::VertexArray quad(sf::Quads, 4);
       
        while (window.isOpen())
        {
                window.clear();
                sf::Event event;
                int size{ 20 };

                while (window.pollEvent(event))
                {
                        if (event.type == sf::Event::Closed)
                                window.close();
                }
                for (int x = 0; x < 40; x++)
                {
                        for (int y = 0; y < 40; y++)
                        {
                                quad[0].position = sf::Vector2f(x, y);
                                quad[1].position = sf::Vector2f(x*size, y);
                                quad[2].position = sf::Vector2f(x*size, y*size);
                                quad[3].position = sf::Vector2f(x, y*size);
                                window.draw(quad);
                        }
                }
               
                window.display();
        }

        return 0;
}

The code is pretty much the one from tutorial with the vertex just added. I know the for loops in combine call 40*40 time but i didnt expect it to fall this quick. Is there a alternative way to do it ?