SFML 2.0 Drawing random colored shape

[Vladislav]

Hi all! I' m trying to realize drawing random colored shape with SFML 2.0. But i have a problem - shape is not dispalyed.
Code:

//array of colors for random selecting
const sf::Color colorArray[5]={sf::Color::Cyan, sf::Color::Blue, sf::Color::Green, sf::Color::Red, sf::Color::Yellow };
srand(time(NULL));
RenderWindow window(VideoMode(Rows*10, Cols*10), "Blocks");
RectangleShape block(Vector2f(10, 10));
block.setFillColor(colorArray[rand()%5]);
block.setPosition(0, 0);
window.draw(block);

I have a black screen only. What i am doing wrong?
Thanks.

[eXpl0it3r]

What i am doing wrong?

Not reading the official tutorials.
It's quite obvious that the given code is incomplete in many parts.

[Vladislav]

Hmm... Probably i am wrong, but i don't see the incomplete parts. Can you show me it, please?

[BurrickSlayer]

Make sure you have a window.display() in your loop.

[Vladislav]

Make sure you have a window.display() in your loop.

Yes, i have.

[Jebbs]

Please look at this tutorial: http://www.sfml-dev.org/tutorials/2.1/graphics-draw.php

In the first bit of code shows the correct way to open and use a Render Window. Take a look at it, and then you should easily be able to see ways that you can rewrite your code.

[Vladislav]

My main():

int main()
{
        srand(time(NULL));
        RenderWindow window(VideoMode(Rows*16, Cols*16), "Blocks");
        RectangleShape block(Vector2f(16, 16));
        block.setFillColor(colorArray[rand()%5]);
        while (window.isOpen())
    {
        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
                window.close();
        }

       window.clear();
           block.setPosition(0, 0);
           window.draw(block);
       window.display();
    }
    system("pause");
    return 0;

}

In my first post of this topic i gave only key actions (without loop and events). This is full code of main();

[Stauricus]

i don't see anything wrong so far...

colorArray is an array that you predefined with some sf::Colors, right?
try changing its line to

 block.setFillColor(sf::Color::White);

and let's see if it works.

[Vladislav]

i don't see anything wrong so far...

colorArray is an array that you predefined with some sf::Colors, right?
try changing its line to

 block.setFillColor(sf::Color::White);

and let's see if it works.

I've tried it before, and i learned that if i use sf::Color (nor from colorArray), it works.

[Stauricus]

are you sure it's not displaying? i tried it, and its working for me.
try this, with the std::cout output we'll know if rand() is working as it should.

using namespace sf;
int main()
{
    const sf::Color colorArray[5]={sf::Color::Cyan, sf::Color::Blue, sf::Color::Green, sf::Color::Red, sf::Color::Yellow };
    srand(time(NULL));
    RenderWindow window(VideoMode(200, 200), "Blocks");
    RectangleShape block(Vector2f(16, 16));
    std::cout << rand()%5;
    block.setFillColor(colorArray[rand()%5]);
    while (window.isOpen())
    {
        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
                window.close();
        }

       window.clear();
       block.setPosition(0, 0);
       window.draw(block);
       window.display();
    }
    return 0;
}

[Vladislav]

rand() works.

[Stauricus]

geez, i have no idea. let's try taking off "const sf::" from here:

Color colorArray[5]={sf::Color::Cyan, sf::Color::Blue, sf::Color::Green, sf::Color::Red, sf::Color::Yellow };

if does not work, try changing:

block.setFillColor(colorArray[2]);

and see if it works.

if everything fails, i'd suggest you to update to SFML 2.1

[Vladislav]

Shit, it doesn't work :-( I will try to update my SFML.

[Vladislav]

I have SFML 2.1 now. But it still not working.

[Stauricus]

what?
then, i really have no idea. does this works?

#include <iostream>
#include <string>
int main(){
  std::string test[5]={"zero", "one", "two", "three", "four"};
  std::cout << test[2];
  return 0;
}

if don't, then it may be something on your compiler. if it does, then we'll need help from someone more experienced.