Messages

1

Graphics / Making sprite go in circles

« on: October 04, 2011, 02:55:41 pm »

:lol: I used old revision with new docs. Back to cmake and compiling. Sry for wasting your time :lol:

2

Graphics / Making sprite go in circles

« on: October 04, 2011, 02:38:23 pm »

Found the problem. It isn't graphic package. Window.GetFrameTime() returns 1 or 0. Tried with Clock class, but still the same problem. Anyone know a fix for it?

3

Graphics / Making sprite go in circles

« on: October 03, 2011, 11:14:14 pm »

I used trigonometric cicrcle to make ball sprite move on a circular path. It does, only thing is that the path is always moving and changing radius. Don't know if it is a float rounding error or my computer going mad, or probably a semantic error. I'd be grateful if someone took a look at code and helped my find the error.
Sry if code isn't readable. I commented only logic parts.

Code: [Select]



#include <SFML\Graphics.hpp>
#include <cmath>

int main()
{
    sf::VideoMode VMode(800, 600, 32);
    sf::RenderWindow Window(VMode, "Test");

    sf::Texture Ball;
    if (!Ball.LoadFromFile("ball.png"))
        return 1;

    double speed = 1;//constants and start values
    long double angle = 90;
    const double rad = 57.2957795;
    double ang = 0;

    sf::Sprite ball(Ball);
    ball.SetPosition(400,300);
    ball.SetScale(0.1,0.1);




    sf::Event Event;
    while (Window.IsOpened())
    {


        while (Window.PollEvent(Event))
        {
            if (Event.Type == sf::Event::Closed)
            {
                Window.Close();
                break;
            }

        }
        if (angle > 360)//if angle exceeds 360
                angle -= 360;//reset it
            angle += speed * Window.GetFrameTime();//angle in degrees
            ang = angle/rad;//angle in radians

        ball.Move(std::sin(ang),std::cos(ang));//move on a circular path
        Window.Clear(sf::Color(255,0,0));
        Window.Draw(ball);
        Window.Display();
    }

    return 0;
}


4

Graphics / Screenshot

« on: September 23, 2011, 12:45:16 pm »

Thx for a fast reply. Just moved Window.Capture() a bit above and it worked. Thx for help.

5

Graphics / Screenshot

« on: September 23, 2011, 12:32:11 pm »

I started learning SFML from SFMLCoder, and noticed that SFML interface changed, so I switched Image with Texture. This is lesson 2, so I didn't get very far . The program worked, but I couldn't get a screenshot, so I googled, and found out, that I need an sf::Image and Window.Capture(). The program compiles, and runs, but it says that screenshot failed to save. My guess is that screenshot image is empty, but I am really new to SFML and I finished chapter 13 in Prata's book, so I am new to C++, too. I'd appreciate if someone took a look at the code and told me what to change and why. Sry if this has been asked 1000 times already.

Code: [Select]


#include <SFML/Graphics.hpp>

int main()
{

    sf::VideoMode VMode(800, 600, 32);//Create Window
    sf::RenderWindow Window(VMode, "Empty Window");

    sf::Texture Image;//Create image
    if (!Image.LoadFromFile("cake.png"))//Add a meme
        return 1;


    sf::Sprite Sprite2;//Make a sprite
    Sprite2.SetTexture(Image);//Adjust it as I want
    Sprite2.SetPosition(0.0f, 0.0f);
    Sprite2.SetScale(0.0f, 0.0f);
    Sprite2.Resize((float)VMode.Width, (float)VMode.Height);
    Sprite2.SetColor(sf::Color::Red);//Paint it with blood!!!!

    sf::Image Screenshot;//Image to store the screenshot

    while (Window.IsOpened())//If it is open
    {
        sf::Event Event;
        while (Window.PollEvent(Event))
        {
            switch (Event.Type)
            {
            case sf::Event::Closed://Check if it has been closed
                Window.Close();
                break;
            default:
                break;
            }
        }

        Window.Clear(sf::Color(0,255,127));//Color it

        Window.Draw(Sprite2);//Draw the sprite
        Window.Display();//Display the window
        Screenshot = Window.Capture();//Store screen in image

    }

    Screenshot.SaveToFile("sc.png");//Save screenshot
    return 0;
}