Messages

1

General / How to draw to specific area of the window?

« on: March 15, 2021, 04:52:26 pm »

I want to draw to very specific area of the window (starting from (250, 20) to right lower corner of the window, window also can be resized). I know I have to use viewport on a window sized view, but how to calculate its FloatRect? Viewport will be set to the black rectangle area and view will be moved by mouse so I can see whole loaded texture when it is bigger than window. I aiming for something like TileSet Editor from Godot engine.

2

General / How to always draw texture in its original resolution?

« on: March 15, 2021, 12:47:10 am »

I want to draw texture always in its original resolution independent of resizing the window etc. Is it possible?

3

General / Re: How to draw grid using VertexArray?

« on: March 12, 2021, 02:27:59 am »

Yes, I know. I actually did it like this:

sf::Vertex line[2];
                for (int i = m_ViewDefaultCenter.y - m_MapHeight * m_TileSize; i <= m_ViewDefaultCenter.y + m_MapHeight * m_TileSize; i += m_TileSize)
                {
                        line[0] = sf::Vector2f(m_ViewDefaultCenter.x - m_MapWidth * m_TileSize, i);
                        line[1] = sf::Vector2f(m_ViewDefaultCenter.x + m_MapWidth * m_TileSize, i);
                        m_Window.draw(line, 2, sf::Lines);
                }

                for (int i = m_ViewDefaultCenter.x - m_MapWidth * m_TileSize; i <= m_ViewDefaultCenter.x + m_MapWidth * m_TileSize; i += m_TileSize)
                {
                        line[0] = sf::Vector2f(i, m_ViewDefaultCenter.y - m_MapHeight * m_TileSize);
                        line[1] = sf::Vector2f(i, m_ViewDefaultCenter.y + m_MapHeight * m_TileSize);
                        m_Window.draw(line, 2, sf::Lines);
                }

I thought there is a better, more optimized way because of this post: https://en.sfml-dev.org/forums/index.php?topic=22021.0

4

General / How to draw grid using VertexArray?

« on: March 12, 2021, 12:39:36 am »

 I realized that I must use VertexArray to draw grid overlay in my level editor but I can't get it right. Can I do it by using one VertexArray (if yes how?) or do I need to use more VertexArrays (perhaps std::vector)?