Welcome, Guest. Please login or register. Did you miss your activation email?

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Dr. Cassoulet

Pages: [1]
1
Window / Re: [Solved] Strange behavior with sf::View
« on: July 02, 2016, 06:01:46 pm »
Indeed that was really dumb, thank you a lot.  :)

2
Window / [Solved] Strange behavior with sf::View
« on: July 02, 2016, 02:55:44 pm »
Hi everyone !

I work on a little GUI system for fun with SFML and I met a strange behavior with sf::View. I’ve made a simple version of the problem. The goal of this example is to draw 3 rectangles, each one within the other with a viewport.

If i call my function draw like that
draw(window, window.getView());
the last rectangle is not well positioned.
http://imgur.com/91UU5Js

But if I call it like that it works and this confused me a lot…
sf::View myView = window.getView();
draw(window, myView);
http://imgur.com/4kVlLNb

I compared the two views with the Visual Studio debbuger but they are identical.
http://imgur.com/tLVldD1
(even if the hexadecimal number at the beginning of the matrix is different, the content is however identical)

This is the code of the example.

#include <SFML/Graphics.hpp>

void draw(sf::RenderWindow &window, const sf::View &viewWindow)
{
        sf::View viewParent = window.getView();
        //------------------------------------

        //---draw rec1---

        sf::RectangleShape rec1(sf::Vector2f(500, 500));
        rec1.setFillColor(sf::Color::Red);
        rec1.setPosition(360, 110);
        window.draw(rec1);

        sf::View viewRec1(sf::FloatRect(0, 0, rec1.getSize().x, rec1.getSize().y));//create a view with the same size and position as rec1
        viewRec1.setViewport(sf::FloatRect(
                rec1.getPosition().x / viewWindow.getSize().x,
                rec1.getPosition().y / viewWindow.getSize().y,
                rec1.getSize().x / viewWindow.getSize().x,
                rec1.getSize().y / viewWindow.getSize().y
        ));
        window.setView(viewRec1);


        //---draw rec2 inside rec1---

        sf::RectangleShape rec2(sf::Vector2f(300, 300));
        rec2.setFillColor(sf::Color::Green);
        rec2.setPosition(rec1.getSize().x/2 - rec2.getSize().x/2, rec1.getSize().y / 2 - rec2.getSize().y / 2);
        window.draw(rec2);

        sf::View viewRec2(sf::FloatRect(0, 0, rec2.getSize().x, rec2.getSize().y));//create a view with the same size and position as rec2 "inside" the rec1's view
        viewRec2.setViewport(sf::FloatRect(
                window.getView().getViewport().left + (rec2.getPosition().x / viewWindow.getSize().x),
                window.getView().getViewport().top + (rec2.getPosition().y / viewWindow.getSize().y),
                rec2.getSize().x / viewWindow.getSize().x,
                rec2.getSize().y / viewWindow.getSize().y
        ));
        window.setView(viewRec2);


        //---draw rec3 inside rec2

        sf::RectangleShape rec3(sf::Vector2f(100, 100));
        rec3.setFillColor(sf::Color::Blue);
        rec3.setPosition(rec2.getSize().x / 2 - rec3.getSize().x / 2, rec2.getSize().y / 2 - rec3.getSize().y / 2);
        window.draw(rec3);

        //------------------------------------
        window.setView(viewParent);
}


int main()
{
        sf::RenderWindow window(sf::VideoMode(1220, 720), "Test bug view SFML");

        sf::Event event;

        while (window.isOpen())
        {

                while (window.pollEvent(event))
                {
                        if (event.type == sf::Event::Closed)
                        {
                                window.close();
                        }

                        else if (event.type == sf::Event::Resized)
                        {
                                window.setView(sf::View(sf::FloatRect(0, 0, event.size.width, event.size.height)));
                        }
                }

                window.clear(sf::Color::White);

                //Don't work, the last rectangle is not center
                //------------------
                //draw(window, window.getView());
                //------------------
               
                //but this work ?!
                //------------------
                sf::View myView = window.getView();
                draw(window, myView);
                //-----------------

                window.display();
        }

        return 0;
}

I’m sure I made a dumb mistake somewhere but I fail to find it. Any ideas ?

Thanks in advance

Pages: [1]
anything