Messages

1

Graphics / Incorrect displaying VertexArray

« on: November 30, 2018, 04:05:29 am »

I wanted to display points 16x16 on window with changed view, but my settings not work as I expected.
First line of points are not draw on window, until i changed {0, 0, 16, 16} to {0, -1, 16, 16} why is that work that way?

sf::RenderWindow window(sf::VideoMode(800, 600), "Window");

    sf::VertexArray points(sf::Points, 256);

    for(size_t i = 0u; i < 16; ++i)
    {
        for(size_t j = 0u; j < 16; ++j)
        {
            if(i == 0 || j == 0 || i == 15 || j == 15)
                points[i * 16 + j] = {{static_cast<float>(j), static_cast<float>(i)}, sf::Color(0u, 255u, 0u)};
            else
                points[i * 16 + j] = {{static_cast<float>(j), static_cast<float>(i)}, sf::Color(255u, 0u, 0u)};
        }
    }

    sf::View view;
    view.reset({0, 0, 16, 16});
    // view.reset({0, -1, 16, 16});
    view.setViewport({0.25f, 0.25f, 0.5f, 0.5f});

    window.setView(view);
 

The whole code in attachment.