Messages

1

Graphics / Re: Strange behavior when I draw a chequered design

« on: April 24, 2014, 03:41:53 pm »

Thanks!
Now it work just fine!

2

Graphics / Re: Strange behavior when I draw a chequered design

« on: April 24, 2014, 02:02:01 pm »

So how can I resize the "video mode"?

3

Graphics / Re: Strange behavior when I draw a chequered design

« on: April 24, 2014, 01:17:02 pm »

No, I don´t. Should I handle it?
I got always the correct size of the window by the target argument given in the draw function so I thought I don´t have to handle it.

4

Graphics / Re: Strange behavior when I draw a chequered design

« on: April 24, 2014, 01:11:57 pm »

What do you do, when you resize your window?

I dragged the corner of the window. Nothing else.

5

Graphics / Re: Strange behavior when I draw a chequered design

« on: April 24, 2014, 12:02:18 pm »

I already solved the "wiggly" part. But when I resize the window there´s an another problem:
If I make it bigger, the board is "cutted". So you can´t see the whole board.
If I make it smaller, there´s a big border arround the board.

I use Code::Blocks 13.12 with MinGW and a self-compiled SFML library. May is this responsible for the problem?

6

Graphics / Re: Strange behavior when I draw a chequered design

« on: April 23, 2014, 09:31:46 pm »

Unfortenaly it isn´t.
Ironically my code works if I the window is given since the beiginning. Even if it´s not a square.
But as soon as I resize the window it looks as shown on the images.

But here´s a minimal and complete example that produces the problem:

#include <SFML/Graphics.hpp>

int main()
{
    sf::Color boxes[64];
    bool white = true;

    for (int n = 0; n < 64; n++)
    {
        white = (n % 8) == 0 ? white : !white;
        boxes[n] = white ? sf::Color::White : sf::Color::Black;
    }

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

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

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

        //Relevant Code:
        sf::Vector2u wsize = window.getSize();

        int length = (wsize.x < wsize.y) ? (wsize.x - (wsize.x % 8)) / 8 : (wsize.y - (wsize.y % 8)) / 8;
        int offsetx = (wsize.x - (length * 8)) / 2;
        int posy = (wsize.y - (length * 8)) / 2;
        int posx = offsetx;

        int n = 0;
        while (n < 64)
        {
            sf::RectangleShape box(sf::Vector2f(length, length));
            box.setFillColor(boxes[n]);
            box.setPosition(posx, posy);
            window.draw(box);

            n++;

            if (n % 8 == 0)
            {
                posx = offsetx;
                posy += length;
            }
            else
            {
                posx += length;
            }

        }
        //Relevant Code End

        window.display();
    }
}
 

7

Graphics / Re: Strange behavior when I draw a chequered design

« on: April 23, 2014, 12:54:26 pm »

At first I had a for loop but the first square on the board is kind of special.
If I calculate the position first it didn´t worked. So i had to calculate it after the drawing the first square.
But also I had to increment n before I calculate the new position. I would to have use flags if I had used a for loop. So I think this while loop is a little bit convenient than a for loop with flags.

What do you mean with minimal and complete example?

So here´re some screenshots:
Big Window:


Tiny window:


EDIT:
I found the problem with the wiggly first row:
I forgot to add the offset to posx in each new row.

I updated the code in the first post.

8

Graphics / Strange behavior when I draw a chequered design

« on: April 22, 2014, 11:11:40 pm »

Hello,

At the moment I´m programming a chess game with sfml. But when I tried to draw a chessboard I got strange results. If the window was not a square the chessboard was wiggly.
I can´t figure out where I made the mistake and I´m searching for it for hours.
I hope you guys will find it.

And sorry for my bad english.

So heres my Code:

void Chessboard::draw(sf::RenderTarget& target, sf::RenderStates states) const
{
    sf::Vector2u wsize = target.getSize();

    //Size
    int length = (wsize.x < wsize.y) ? (wsize.x - (wsize.x % 8)) / 8 : (wsize.y - (wsize.y % 8)) / 8;

    //Offset
    int xoffset = (wsize.x - (length * 8)) / 2;
    int posx = xoffset;
    int posy = (wsize.y - (length * 8)) / 2;

    //Draw boxes
    int n = 0;
    while (n < 64)
    {

        sf::RectangleShape box(sf::Vector2f(length, length));
        box.setFillColor(boxes[n]); //sf::Color boxes[64]
        box.setPosition(posx, posy);

        //Draw box
        target.draw(box, states);

        n++;

        if (n % 8 == 0)
        {
            posx = xoffset;
            posy += length;
        }
        else
        {
            posx += length;
        }
    }
}