anonymous_namespace{model.cpp} Namespace Reference

Variables
auto	index_map

Variable Documentation

index_map

auto anonymous_namespace{model.cpp}::index_map

Initial value:

= []() {
    using Vertex = nngn::Vertex;
    constexpr auto map_hash = [](const Vertex &v) {
 
 
        constexpr auto hash = [](nngn::vec3 x) {
            constexpr auto comb = [](std::size_t seed, std::size_t h) {
                h += 0x9e3779b9 + (seed << 6) + (seed >> 2);
                return seed ^ h;
            };
            constexpr std::hash<float> h = {};
            std::size_t seed = 0;
            seed = comb(seed, h(x.x));
            seed = comb(seed, h(x.y));
            seed = comb(seed, h(x.z));
            return seed;
        };
        return ((hash(v.pos) ^ (hash(v.norm) << 1)) >> 1)
            ^ (hash(v.color) << 1);
    };
    constexpr auto map_cmp = [](
        const Vertex &lhs, const Vertex &rhs
    ) {
        return std::tie(lhs.pos, lhs.norm, lhs.color)
            == std::tie(rhs.pos, rhs.norm, rhs.color);
    };
    using T = std::unordered_map<
        Vertex, u32, , >;
    return T(16, map_hash, map_cmp);
}