Topics

1

Graphics / Cannot call draw() from constant RenderTarget object.

« on: April 14, 2020, 05:49:02 pm »

Hi,
I made a function that is supposed to draw a text on a RenderTarget. But I an error message saying that "No instance of overloaded function could be found.". Here is my function:

void DrawStringInBox(const sf::RenderTarget &xindox, const std::string& String, const sf::Font& font) {
        sf::Text text(String, font);
        xindox.draw(text);
}

But, it works fine when I remove the const before the RenderTarget:

void DrawStringInBox(sf::RenderTarget &xindox, const std::string& String, const sf::Font& font) {
        sf::Text text(String, font);
        xindox.draw(text);
}

Why? Isn't draw() a const function? And if it isn't, why wouldn't it be?

2

Network / Cannot read from Packet.

« on: April 02, 2020, 07:06:09 pm »

Hi,

While reading the tutorial about packets, I tried to do my own project to test it. So, I made a peer-to-peer connection between two computers (it works! ^^), and I sent a packet from one to the other... The problem is when I try to read from the packet: the >> operator always returns false.
Here is the code:

On the sender's side:

#include <sfml/network.hpp>

sf::UdpSocket UdpS;

namespace Contact
{
         sf::IpAddress Ip;
        unsigned short Port;
};

int main() {
        UdpS.setBlocking(false);

        //Establishes P2P connection,
       //and finds the other contact's IP and port.
       //Also binds UdpS.
      //Returns true here.
        if (!Connect()) {
                std::cout << "Connection error." << std::endl;
                return 1;
        }
        std::cout << "Connected." << std::endl;

        sf::Uint16 u = 5;
        sf::Packet pack; pack << u;
        if (UdpS.send(pack, Contact::Ip, Contact::Port) != sf::Socket::Done) {
                std::cout << "Failure." << std::endl;
        }
        std::cout << "Sent" << std::endl; //Sent is printed, thus the packet is sent correctly.
}

And on the recipient's side:

#include <sfml/network.hpp>

sf::UdpSocket UdpS;

namespace Contact
{
         sf::IpAddress Ip;
        unsigned short Port;
};

int main() {
        UdpS.setBlocking(false);
        //Establishes P2P connection,
       //and finds the other contact's IP and port.
       //Also binds UdpS.
      //Returns true here.
        if (!Connect()) {
                std::cout << "Connection error." << std::endl;
                return 1;
        }
        std::cout << "Connected.   " << std::endl;

        UdpS.setBlocking(true);
        sf::Packet pack;
        if (UdpS.receive(pack, Contact::Ip, Contact::Port) != sf::Socket::Done) { return 1; }
       
        sf::Uint16 i;
        if (!(pack >> i)) { std::cout << "Reading failed." << std::endl; return 1; } //Reading failed is printed.
       
}

3

General / Cmake does not yield a x86 compatible Visual Studio solution.

« on: March 30, 2020, 12:54:49 pm »

 Hi,

I was trying to compile a static version of SFML with CMake for Visual Studio 2019, I think I followed the tutorial (https://www.sfml-dev.org/tutorials/2.5/compile-with-cmake.php) correctly. The problem is that once I open the CMake generated solution to finally build SFML, I see that I cannot switch the solution configuration to x86, thus preventing me to build SFML in 32-bits.

Here are all the steps I did to compile SFML with CMake:

Firstly, I downloaded the SFML source code,
then, I opened CMake, chose the SFML file as source code and a build folder to put built files into.
Then, I clicked on configure, chose Visual studio 16 2019 as generator, and clicked on finish.
Once the configuring done, I unchecked BUILD_SHARED_LIBS, checked SFML_USE_STATIC_STD_LIBS, clicked on configure, then generate. Once everything is done, I clicked on the Open_Project button which opens the generated Visual Studio solution.

And there is the issue: I cannot switch the project's configuration to something else than x64...

What did I do wrong?