hello,

I'm trying to implement a version of Achtung die Kurve,

i'd like to store every line in std::unordered set

so if there's a collision i could tell a player its lost

every player is a line that add each point to the end.

its not working because i couldn't succeeded doing hash and equal function of vertices.

latest sfml, visual studio 2017

`#pragma once`

#include <SFML/Graphics.hpp>

#include <unordered_set>

#include <functional>

size_t hash(const sf::Vertex& vertex) {

std::size_t seed = 0;

seed ^= std::hash<unsigned int>()((unsigned int)vertex.position.x) + 0x9e3779b9 + (seed << 6) + (seed >> 2);

seed ^= std::hash<unsigned int>()((unsigned int)vertex.position.y) + 0x9e3779b9 + (seed << 6) + (seed >> 2);

return seed;

};

bool equal(sf::Vertex const& lhs, sf::Vertex const& rhs)

{

return lhs.position.x == rhs.position.y && lhs.position.y == rhs.position.y;

};

class VertexSet : public sf::Drawable

{

public:

VertexSet();

private:

using equal_type = bool (*)(const sf::Vertex&, const sf::Vertex&);

using hash_type = std::size_t(*)(const sf::Vertex&);

std::unordered_set<sf::Vertex, hash_type, equal_type> m_vertices = std::unordered_set<sf::Vertex, hash_type, equal_type>(0, hash, equal);

sf::PrimitiveType m_primitiveType;

};

its not working actually,

error represents:

`Severity Code Description Project File Line Suppression State`

Error LNK2005 "bool __cdecl equal(class sf::Vertex const &,class sf::Vertex const &)" (?equal@@YA_NAEBVVertex@sf@@0@Z)

I want to have a set of points that i can draw the things,

fast insertion and find

please advice,

thank you