Trouble receiving ints in classes from packets

[KingPenguinator]

Hi

So I have this problem that has been bugging me these past few days, i've searched a fair bit, but to no avail.

When I do this:

//sockets and packets already declared

sf::Vector2i playerPos;

socket.receive(packet);
if(packet >> playerPos.x >> playerPos.y)
{
      player.setPosition(playerPos);
}

 

I'll get an overload error saying that the compiler doesn't know how to cast int to char*, I've heard somewhat that I need to make it explicit(I don't know how/where).

Any help would be appreciated, if you need more code, do say so

[Laurent]

Please show the exact error message, as well as the line of code where the compilers points to.

[KingPenguinator]

sf::Packet& operator >>(sf::Packet& packet, Personnage& player)
{
    return packet >> player.getPos().x >> player.getPos().y;
}

fighter - client\game.cpp||In function 'sf::Packet& operator>>(sf::Packet&, Personnage&)':|
fighter - client\game.cpp|20|error: no match for 'operator>>' in 'packet >> (& player)->Personnage::getPos().sf::Vector2<float>::x'|
fighter - client\game.cpp|20|note: candidates are:|
SFML-2.1\include\SFML\Network\Packet.hpp|177|note: sf::Packet& sf::Packet::operator>>(bool&)|
SFML-2.1\include\SFML\Network\Packet.hpp|177|note:   no known conversion for argument 1 from 'float' to 'bool&'|
SFML-2.1\include\SFML\Network\Packet.hpp|178|note: sf::Packet& sf::Packet::operator>>(sf::Int8&)|
SFML-2.1\include\SFML\Network\Packet.hpp|178|note:   no known conversion for argument 1 from 'float' to 'sf::Int8& {aka signed char&}'|
 

I couldn't find the original snippet that I 1st posted about, but I have the same problem with this

[KingPenguinator]

I'm not sure, but I think I solved it with this

sf::Packet& operator >>(sf::Packet& packet, Personnage& player)
{
    sf::Vector2i playerPos;
    return packet >> playerPos.x >> playerPos.y;
}
 

I don't know if that's the solution, or i'm just using a different way of extracting the packet.

[Ixrec]

Could you show us the code where you put data into the packet, and the implementation of Personnage?  Or better yet, a complete and minimal example.  This is probably just a type mismatch somewhere in your code.

[KingPenguinator]

//implementation, both player2 and player2aux are Personnages
if(packet >> player2aux)
        {
            player2.updatePlayer(player2aux); //updates player2 if player2aux's position is different
        }

//the way i'm using the overload now :
sf::Packet& operator >>(sf::Packet& packet, Personnage& player)
{
    sf::Vector2i playerPos;
    if(packet >> playerPos.x >> playerPos.y)
    {
        player.setPos(playerPos.x, playerPos.y);
    }
    return packet;
}

 

[Laurent]

You shouldn't use native types directly in packets, because their size can vary between the client and the server. Use fixed-size types instead (sf::Uint32, etc.). This problem, as well as others, are very well described in the tutorial about packets. You should read it carefully.

[KingPenguinator]

So I should use sf::Int32 for example in all of my classes instead of Int ?

If so, is it possible to cast an int to a sf::Int32 and vice versa ?

[Laurent]

So I should use sf::Int32 for example in all of my classes instead of Int ?

Use fixed-size types for everything that you put in / extract from packets.

If so, is it possible to cast an int to a sf::Int32 and vice versa ?

Yes of course, fixed-size types are just typedefs to native types. For example, sf::Uint32 is just a typedef to unsigned int.

[KingPenguinator]

hmm, could you give me an example of casting it please ?
I don't quite get what you said about typedefs.

[Nexus]

hmm, could you give me an example of casting it please ?
I don't quite get what you said about typedefs.

You seem to know neither static_cast nor typedefs... You should really learn C++ properly before trying to use SFML

[KingPenguinator]

Well the idea was to learn as I go along, I can't know ahead of time what i'm going to need to have learned before the need to have learned it comes.

[Laurent]

You know that you need to learn C++ before SFML, obviously

[KingPenguinator]

Agreed

[KingPenguinator]

Well, thx for the help.
Now i'm going to have "fun" learning about static_casts and such