Messages

1

Graphics / Re: sf::Image::setPixel Crashing the application

« on: November 13, 2015, 05:17:05 pm »

Thanks! this

image.setPixel(600, 600, sf::Color::White);

was the thing crashing, just changing the <= to < has done it.

and...

texture.update(image);

it will change the texture because its on the main loop, so it will be called every frame...
but is there's any alternatives to this function?

2

Graphics / Re: sf::Image::setPixel Crashing the application

« on: November 13, 2015, 05:06:31 pm »

If its not <= its going to loop forever, i just want it to draw a line inside the boundaries of the window (600 pixels high)

3

Graphics / sf::Image::setPixel Crashing the application

« on: November 13, 2015, 04:56:52 pm »

(first of all, sorry for my bad english, its not my native language)

Hi!

I'm using SFML v2.3, Mingw32 v4.7.1 (Code::Blocks default) and Windows 10.

I'm trying to make an application to test the sf::Image class and render single pixels, but everytime i try to do a simple loop using sf::Image::setPixel it crashes...

#include <SFML/Graphics.hpp>
#include <iostream>

int loopCount = 0;

const int Largura = 800;
const int Altura = 600;

int main()
{
    //Setup Window
    sf::RenderWindow window(sf::VideoMode(Largura, Altura), "yay");
    window.setVerticalSyncEnabled(true);

    // create an empty 800x600 texture
    sf::Texture texture;
    if (!texture.create(800, 600))
    {
        std::cout << "Fail to create the texture";
    }

    // create an black image
    sf::Image image;
    image.create(800, 600, sf::Color::Black);

    // Set the texture to be the image and create the Sprite to render
    texture.update(image);
    sf::Sprite sprite;
    sprite.setTexture(texture);

    //the loop that is crashing the program
    //it should create a diagonal line of white pixels
    for(int i=0; i<=600; i++){
    image.setPixel(i, i, sf::Color::White);
    }

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

        //The actual Rendering
        window.clear();
        texture.update(image);
        window.draw(sprite);
        window.display();
    }

    return 0;

}
 

What am i doing wrong? I am not suposed to manipulate pixels like that?