Messages

1

Graphics / Re: segfault displaying dynamic array rectangle

« on: July 10, 2024, 03:55:10 pm »

it works! thanks so much

2

Graphics / [SOLVED] segfault displaying dynamic array rectangle

« on: July 10, 2024, 01:46:51 pm »

Hi all,
probably a silly mistake on my behalf but i cant figure out for the life of me why this program can successfully display the dimensions of the rectangle but cant actually draw it without a seg-fault. (i know the window will disappear instantly)

i know i can use other data-types but i would preferably like to allocate arrays myself.

any help would be greatly appreciated.





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

sf::RenderWindow window(sf::VideoMode(1920, 1080), "window", sf::Style::Fullscreen);


int main(){
    sf::RectangleShape** recarr = (sf::RectangleShape **)malloc(sizeof(sf::RectangleShape *));
    recarr[0] = (sf::RectangleShape *)malloc(sizeof(sf::RectangleShape));
    recarr[0][0] = sf::RectangleShape(sf::Vector2f(30, 100));
    window.clear();
    std::cout << "width of block: " << recarr[0][0].getSize().x << " bytes: " << sizeof(sf::RectangleShape) << std::endl; //this works
    window.draw(recarr[0][0]); //this doesn't
    window.display(); //this works
}


returns:

width of block: 30 bytes: 344
[1]    40165 segmentation fault  ./t

window.draw(sf::RectangleShape(sf::Vector2f( 100, 30)));

(also just doing window.draw(sf::RectangleShape(sf::Vector2f( 100, 30))) works if that changes anything)

i appreciate it